UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-Q

           |X| QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                  For the quarterly period ended June 30, 2004

          |_| TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                        Commission File Number: 0-220-20

                                    CASTELLE
             (Exact name of Registrant as specified in its charter)

           California                                     77-0164056
(State or other jurisdiction of                (IRS Employer Identification No.)
 incorporation or organization)

              855 Jarvis Drive, Suite 100, Morgan Hill, California
                 95037 (Address of principal executive offices,
                               including zip code)

                                 (408) 852-8000
              (Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the Registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. Yes |X| No __

The number of shares of Common Stock outstanding as of July 28, 2004 was
3,600,703.

Indicate by check mark whether the  registrant  is an  accelerated  filer
(as defined in Rule 12b-2 of the Exchange Act).   Yes __ No  |X|






                                    CASTELLE
                                    FORM 10-Q
                                TABLE OF CONTENTS

                                                                            PAGE
PART I.    FINANCIAL INFORMATION

     Item 1.    Unaudited Condensed Consolidated Financial Statements:

                Condensed Consolidated Balance Sheets                         2

                Condensed Consolidated Statements of Operations               3

                Condensed Consolidated Statements of Cash Flows               4

                Notes to Condensed Consolidated Financial Statements          5

     SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS                              13

     Item 2.    Management's Discussion and Analysis of Financial Condition
                and Results of Operations                                    14

     Item 3Quantitative and Qualitative Disclosures About Market Risk        28

     Item 4Controls and Procedures                                           28

PART II.   OTHER INFORMATION

     Item 1.    Legal Proceedings                                            29

     Item 2.    Changes in Securities and Use of Proceeds                    29

     Item 3.    Defaults Upon Senior Securities                              29

     Item 4.    Submission of Matters to a Vote of Security Holders          29

     Item 5.    Other Information                                            29

     Item 6.    Exhibits and Reports on Form 8-K                             29

                Signatures                                                   31

                Exhibit 10.1 - Amended Commercial Tenant Lease Agreement dated
                June 1, 2004 between Registrant and Kyung S. Lee and
                Ieesun Kim Lee                                              E- 1

                Exhibit 10.2 - Loan and Security Agreement with Silicon Valley
                Bank                                                        E- 3

                Exhibit 31.1 - Certification pursuant to 18 U.S.C. Section 1350,
                as adopted pursuant to Section 302 of the Sarbanes-Oxley Act
                of 2002                                                     E-37

                Exhibit 31.2 - Certification pursuant to 18 U.S.C. Section 1350,
                as adopted pursuant to Section 302 of the Sarbanes-Oxley Act
                of 2002                                                     E-38

                Exhibit 32.1 - Certificate pursuant to 18 U.S.C. Section 1350,
                as adopted pursuant to Section 906 of the Sarbanes-Oxley Act
                of 2002                                                     E-39

                Exhibit 32.2 - Certificate pursuant to 18 U.S.C. Section 1350,
                as adopted pursuant to Section 906 of the Sarbanes-Oxley Act
                of 2002                                                     E-40





                                       1




                         PART I - FINANCIAL INFORMATION

ITEM 1.    CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

                                    CASTELLE
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                   (unaudited)
                                 (in thousands)

                                                                       June 30, 2004         December 31, 2003

                                                                  ----------------------   --------------------
                                                                                             
Assets:
   Current assets:
     Cash and cash equivalents                                             $   4,842               $  4,614
     Accounts receivable, net of allowance for doubtful accounts
        of $37 and $39, respectively                                             975                    873
     Inventories                                                               1,465                  1,177
     Prepaid expenses and other current assets                                   256                    134
     Deferred taxes                                                              307                    380
                                                                  ----------------------   --------------------
        Total current assets                                                   7,845                  7,178
   Property and equipment, net                                                   287                    376
   Other non-current assets                                                      103                    103
   Deferred taxes, non-current                                                    --                    146
                                                                  ----------------------   --------------------
        Total assets                                                        $  8,235               $  7,803
                                                                  ======================   ====================

Liabilities and Shareholders' Equity:
   Current liabilities:
     Long-term debt, current portion                                        $     14                $    16
     Accounts payable                                                            418                    314
     Accrued liabilities                                                       1,519                  1,759
     Deferred revenue                                                            996                    909
                                                                  ----------------------   --------------------
        Total current liabilities                                              2,947                  2,998
         Long term debt, net of current portion                                   22                     29
                                                                  ----------------------   --------------------
        Total liabilities                                                      2,969                  3,027
                                                                  ----------------------   --------------------

   Shareholders' equity:
     Common stock, no par value:
        Authorized:  25,000 shares
        Issued and outstanding: 3,600 and 3,425, respectively                 27,430                 27,258
     Accumulated deficit                                                     (22,164)               (22,482)
                                                                  ----------------------   --------------------
        Total shareholders' equity                                             5,266                  4,776
                                                                  ----------------------   --------------------
        Total liabilities and shareholders' equity                          $  8,235               $  7,803
                                                                  ======================   ====================


          See accompanying notes to consolidated financial statements.








                                       2




                                    CASTELLE
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                    (in thousands, except per share amounts)
                                   (unaudited)

                                                           Three months ended                   Six months ended
                                                     ................................    ...............................
                                                       June 30, 2004    June 30, 2003    June 30, 2004    June 30, 2003
                                                     ----------------  --------------   ---------------  ---------------

                                                                                                 
   Net sales:
      Products                                            $ 2,090         $ 2,050           $ 4,102          $ 4,151
      Services                                                627             461             1,173              860
                                                     ----------------  --------------   ---------------  ---------------
         Total net sales                                    2,717           2,511             5,275            5,011

   Cost of sales                                              592             573             1,231            1,270
                                                     ----------------  --------------   ---------------  ---------------
         Gross profit                                       2,125           1,938             4,044            3,741
                                                     ----------------  --------------   ---------------  ---------------

   Operating expenses:
       Research and development                               428             429               842              784
       Sales and marketing                                    892             760             1,686            1,495
       General and administrative                             508             509               973              966
                                                     ----------------  --------------   ---------------  ---------------
          Total operating expenses                          1,828           1,698            3,501             3,245

                                                     ----------------  --------------   ---------------  ---------------
   Income from operations                                     297             240               543              496

       Interest income, net                                    5                4                 8                8
       Other expense, net                                    (10)             (14)              (14)             (29)
                                                     ----------------  --------------   ---------------  ---------------
   Income before provision for income taxes                   292             230               537              475
       Provision for income taxes                             121               2               219                4
                                                     ----------------  --------------   ---------------  ---------------
   Net income                                              $  171         $   228           $   318          $   471
                                                     ================  ==============   ===============  ===============




   Income per share:
                                                                                                  
      Net income per common share - basic                  $ 0.05           $ 0.07           $  0.09          $ 0.15
      Net income per common share - diluted                $ 0.04           $ 0.06           $  0.07          $ 0.12
      Shares used in per share calculation - basic          3,573            3,200             3,536           3,223
      Shares used in per share calculation - diluted        4,428            4,138             4,439           4,010

See accompanying notes to unaudited condensed consolidated financial statements.



                                       3





                                    CASTELLE
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)
                                   (unaudited)


                                                                             Six months ended
                                                                   ......................................
                                                                     June 30, 2004        June 30, 2003
                                                                   -----------------   ------------------
                                                                                       
Cash flows from operating activities:
   Net income                                                            $   318             $   471
   Adjustments to reconcile net income to net cash provided by
      operating activities:
     Loss on disposal of fixed assets                                          1                  --
     Depreciation and amortization                                           103                 109
     Provision for doubtful accounts and sales returns                        (3)               (158)
     Provision for excess and obsolete inventory                            (210)                (67)
     Deferred taxes                                                          219                  --
     Changes in assets and liabilities:
      Accounts receivable                                                    (99)               (163)
      Inventories                                                            (78)                305
      Prepaid expenses and other current assets                             (122)               (174)
      Accounts payable                                                       104                (163)
      Accrued liabilities                                                   (240)                121
         Deferred revenue                                                     87                  --
                                                                   -----------------   ------------------
         Net cash provided by operating activities                            80                 281

Cash flows from investing activities:
   Purchase of property and equipment                                        (15)                (99)
                                                                   -----------------   ------------------
        Net cash used in investing activities                                (15)                (99)
                                                                   -----------------   ------------------

Cash flows from financing activities:
   Repayment of long-term debt                                                (9)                (10)
   Repurchase of common stock                                                   -                (48)
   Proceeds from issuances of common stock,
                                                                             172                  79
                                                                   -----------------   ------------------
        Net cash provided by financing activities                            163                  21
                                                                   -----------------   ------------------

Net increase in cash and cash equivalents                                    228                 203

Cash and cash equivalents at beginning of period                           4,614               3,460
                                                                   -----------------   ------------------
Cash and cash equivalents at end of period                               $ 4,842             $ 3,663
                                                                   =================   ==================



See accompanying notes to unaudited condensed consolidated financial statements.




                                       4




                                    CASTELLE
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (unaudited)

1.       Basis of Presentation:

     The accompanying unaudited condensed consolidated financial statements
     include the accounts of Castelle and its wholly-owned subsidiary in the
     United Kingdom. These financial statements have been prepared in accordance
     with accounting principles generally accepted in the United States of
     America. All intercompany balances and transactions have been eliminated.
     In our opinion, all adjustments (consisting only of normal recurring
     adjustments) considered necessary for a fair presentation of our financial
     position, results of operations and cash flows at the dates and for the
     periods indicated have been included. Because all of the disclosures
     required by accounting principles generally accepted in the United States
     of America are not included in the accompanying condensed consolidated
     financial statements and related notes, they should be read in conjunction
     with the audited consolidated financial statements and related notes
     included in the Company's Form 10-K for the year ended December 31, 2003.
     The condensed balance sheet data as of December 31, 2003 was derived from
     our audited financial statements and does not include all of the
     disclosures required by accounting principles generally accepted in the
     United States of America. The results of operations for the periods
     presented are not necessarily indicative of results that we expect for any
     future period, or for the entire year.

     The preparation of financial statements in conformity with generally
     accepted accounting principles requires us to make estimates and
     assumptions that affect the reported amounts of assets and liabilities and
     disclosure of contingent assets and liabilities at the date of the
     financial statements, and the reported amounts of revenues and expenses
     during the reporting period. Actual results could differ from those
     estimates.

     We believe that our existing cash balances and anticipated cash flows from
     operations will be sufficient to meet our anticipated capital requirements
     for the next 12 months. If we have a need for additional capital resources,
     we may be required to sell additional equity or debt securities, secure
     additional lines of credit or obtain other third party financing. The
     timing and amount of such capital requirements cannot be determined at this
     time and will depend on a number of factors, including demand for our
     existing and new products, if any, and changes in technology in the
     networking industry. There can be no assurance that such additional
     financing will be available on satisfactory terms when needed, if at all.
     Failure to raise such additional financing, if needed, may result in us not
     being able to achieve our long-term business objectives. To the extent that
     additional capital is raised through the sale of additional equity or
     convertible debt securities, the issuance of such securities would result
     in additional dilution to our shareholders.

     In addition, because we are dependent on a small number of distributors for
     a significant portion of the sales of our products, the loss of any of our
     major distributors or their inability to satisfy their payment obligations
     to us could have a significant adverse effect on our business, operating
     results and financial condition. In the first six months of 2004 and 2003,
     Ingram Micro and Tech Data, our two largest distributors, collectively
     represented approximately 47% and 48% of our net sales, respectively.

     We do not currently have any material long-term supply contracts with any
     of our manufacturing subcontractors or component suppliers. We purchase
     finished products and


                                       5


     components on a purchase order basis. We own all
     engineering, sourcing documentation, functional test equipment and tooling
     used in manufacturing our products and believe that we could shift product
     assembly to alternate suppliers if necessary. Certain key components of our
     products, including a modem chip set from Conexant, microprocessors from
     Motorola, integrated circuits from Intel and Kendin, are currently
     available from single sources. Other components of our products are
     currently available from only a limited number of sources. In addition,
     certain manufacturers have announced the end-of-life of certain standard
     off-the-shelf components which are being used by us in the manufacture of
     our FaxPress Products. However, we have purchased what we believe to be at
     least two years worth of supplies of these end-of-life components in an
     effort to assure an uninterrupted supply of FaxPress Products to our
     customers for the next two years, while we decide whether to re-engineer
     our Products with the manufacturers' suggested replacement parts, or
     develop new replacement products.

     Certain reclassifications have been made to the prior period's financial
     statements to conform to the current period presentation.

2.       Revenue Recognition:

     We recognize revenue based on the provisions of Staff Accounting Bulletin
     No. 104 "Revenue Recognition" and Statement  of  Financial  Accounting
     Standards  ("SFAS")  No. 48  "Revenue  Recognition  When Right of Return
     Exists."

     Product revenue is recognized upon shipment if a signed contract or
     purchase order exists, the fee is fixed or determinable, collection of the
     resulting receivable is probable and product returns are reasonably
     estimable. Shipment generally occurs and title and risk of loss is
     transferred when the product is delivered to a common carrier.

     We enter into agreements with some of our distributors that permit limited
     stock rotation rights. These stock rotation rights allow the distributor to
     return products for credit but require the purchase of additional products
     of equal value. Customers who purchase products directly from us also have
     limited return rights, which expire 30 days from product shipment. Revenues
     subject to stock rotation or other return rights are reduced by our
     estimates of anticipated exchanges and returns. We establish our returns
     allowance for distributors and direct customers based on historic return
     rates.

     Pursuant to our agreements with distributors, we also protect our
     distributors' exposure related to the impact of price reductions. Price
     adjustments are recorded at the time price reductions are communicated to
     our distributors.

     Revenue for transactions that include multiple elements such as hardware
     and post-contract customer support is allocated to each element based on
     its relative fair value and recognized for each element when the revenue
     recognition criteria have been met for such element. Fair value is
     generally determined based on the price charged when the element is sold
     separately.

     We recognize revenue from support or maintenance contracts, including
     extended warranty and support programs, ratably over the period of the
     contract.

     The following table sets forth net sales derived from products and services
     for the six months ended June 30, 2004 and for each of the three years in
     the period ended December 31, 2003.



                                       6







                                       Three months                   Twelve months ended
                                         ended
                                      -------------- -------------------------------------------------------
                                         June 30,        December 31,        December 31,     December 31,
                                           2004             2003                 2002             2001
                                      -------------- ------------------ ----------------- ------------------
                                                                                        
    Net Sales:
         Products                           $ 4,102            $ 8,337           $ 8,617            $ 8,327
         Services                             1,173              1,877             1,142              1,027
                                      -------------- ------------------ ----------------- ------------------
             Total net sales                $ 5,275            $10,214           $ 9,759            $ 9,354
                                      ============== ================== ================= ==================



     We are unable to provide the cost of sales separately for products and
     services as our internal financial reporting systems did not track this
     information in the reported periods.

3.       Net Income Per Share:

     Basic net income per share is computed by dividing net income by the
     weighted average number of common shares outstanding for such period.
     Diluted net income per share reflects the potential dilution from the
     exercise or conversion of other securities into common stock that were
     outstanding during the period. Diluted net income per share excludes shares
     that are potentially dilutive if their effect is antidilutive. Dilutive
     potential shares consist of incremental common shares issuable upon
     exercise of stock options.

     Basic and diluted net income per share is calculated as follows for the
     second quarter and first six months of 2004 and 2003 (in thousands, except
     per share amounts):



                                                            (in thousands, except per share amounts)
                                                    .......................................................
                                                                         (Unaudited)
                                                    .......................................................
                                                       Three months ended           Six months ended
                                                    .......................... ............................
                                                      June 30,     June 30,    June 30, 2004 June 30, 2003
                                                        2004         2003
                                                    -------------------------- ----------------------------
                                                                                       
  Basic:
     Weighted average common shares outstanding           3,573        3,200         3,536          3,222
                                                    =========================== ============= ==============
     Net income                                          $  171       $  228        $  318        $  471
                                                    =========================== ============= ==============
     Net income per common share - basic                 $ 0.05       $ 0.07        $ 0.09        $ 0.15
                                                    =========================== ============= ==============

  Diluted:
     Weighted average common shares outstanding           3,573        3,200         3,536         3,223
     Common equivalent shares from stock options            855          938           903           787
                                                    --------------------------- ------------- --------------
     Shares used in per share calculation - diluted       4,428        4,138         4,439         4,010
                                                    =========================== ============= ==============
     Net income                                          $  171       $  228        $  318        $  471
                                                    =========================== ============= ==============
     Net income per common share - diluted               $ 0.04       $ 0.06        $ 0.07        $ 0.12
                                                    =========================== ============= ==============


     The calculation of diluted shares outstanding for the three and six months
     ended June 30, 2004 excludes 25,205 shares of common stock issuable upon
     exercise of outstanding stock options, as their effect was antidilutive in
     the period. The calculation of diluted shares outstanding for the three and
     six months ended June 30, 2003 excludes 170,000 shares of common stock
     issuable upon exercise of outstanding stock options as their effect was
     antidilutive in the period.


                                       7





4.       Stock-Based Compensation

     We account for our stock-based compensation plans using the intrinsic value
     method prescribed in Accounting Principles Board Opinion No. 25,
     "Accounting for Stock Issued to Employees." Compensation cost for stock
     options, if any, is measured by the excess of the quoted market price of
     our stock at the date of grant over the amount an employee must pay to
     acquire the stock. SFAS No. 123, "Accounting for Stock-Based Compensation,"
     established accounting and disclosure requirements using a fair-value based
     method of accounting for stock-based employee compensation plans.

     Had compensation costs been determined consistent with SFAS No. 123, our
     net income, net of income taxes, would have been changed to the amounts
     indicated below (unaudited, in thousands, except per share data):



                                                     Three months ended            Six months ended
                                                ............................. ...........................
                                                June 30, 2004 June 30, 2003     June 30,   June 30, 2003
                                                                                  2004
                                                ----------------------------- ---------------------------

                                                                                 
 Net Income - as reported                         $ 171          $ 228          $ 318        $ 471
 Fair value of stock-based compensation, net       (159)           (45)          (255)         (87)
     of taxes
 Net income - pro forma                              12            183             63          384
 Net income per share - basic - as reported       $ 0.05         $ 0.07        $ 0.09       $ 0.15
 Net income per share - diluted - as reported     $ 0.04         $ 0.06        $ 0.07       $ 0.12
 Net income per share - basic - pro forma         $ 0.00         $ 0.06        $ 0.02       $ 0.12
 Net income per share - diluted - pro forma       $ 0.00         $ 0.04        $ 0.01       $ 0.10



     We account for stock-based compensation arrangements with non-employees in
     accordance with Emerging Issues Task Force ("EITF") Abstract No. 96-18,
     Accounting for Equity Instruments That Are Issued to Other Than Employees
     for Acquiring, or in Conjunction with Selling, Goods or Services.
     Accordingly, unvested options and warrants held by non-employees are
     subject to revaluation at each balance sheet date based on the then current
     fair market value.

5.       Inventories:

     Inventories are stated at the lower of standard cost (which approximates
     cost on a first-in, first-out basis) or market and net of provisions for
     excess and obsolete inventory. Inventory details are as follows (unaudited,
     in thousands):



                                              June 30, 2004         December 31, 2003
                                          ----------------------- -----------------------
                                                                       
  Raw material                                       $  966                  $  610
  Work in process                                         1                       -
  Finished goods                                        498                     567
                                        -----------------------------------------------
            Total inventory                         $ 1,465                 $ 1,177
                                        ===============================================





                                       8





6.       Segment Information:

     We have determined that we operate in one segment. Revenues by geographic
     area are determined by the location of the customer and are summarized as
     follows (unaudited, in thousands):


                                                               (Unaudited)
                                            ...................................................
                                               Three months ended         Six months ended
                                            .........................  ........................
                                              June 30,    June 30,      June 30,    June 30,
                                                2004        2003          2004        2003
                                            -------------------------  ------------------------

                                                                          
United States                                   $2,305     $ 2,020       $ 4,435      $4,008
Europe                                             148         153           332         328
Pacific Rim                                        153         258           335         500
Rest of Americas, excluding United States          111          80           173         175
                                            -------------------------  ------------------------
  Total Revenues                                $2,717     $ 2,511       $ 5,275      $5,011
                                            =========================  ========================


     Customers that individually accounted for greater than 10% of net sales are
     as follows (unaudited, in thousands):



                 ...................................................................................................
                                  Quarter Ended                                    Six Months Ended
                 ................................................. .................................................
                      June 30, 2004            June 30, 2003            June 30, 2004            June 30, 2003
   Customer       Amount    Percentage      Amount   Percentage      Amount     Percentage    Amount    Percentage
   --------       ------    ----------      ------   ----------      ------     ----------    ------    ----------
                                                                                        
       A            $  562           20%      $  448          18%     $  1,439          27%    $  1,112         22%
       B            $  701           26%      $  709          28%     $  1,076          20%    $  1,314         26%



7.       Comprehensive Income:

     Comprehensive income is the change in equity from transactions and other
     events and circumstances other than those resulting from investments by
     owners and distributions to owners. There are no significant components of
     comprehensive income excluded from net income, therefore, no separate
     statement of comprehensive income has been presented.

8.       Commitments and Contingencies:

     Contingencies
     From time to time, we are involved in various legal proceedings in the
     ordinary course of business. We are not currently involved in any
     litigation, which, in our opinion, would have a material adverse effect on
     our business, operating results, cash flows or financial condition;
     however, there can be no assurance that any such proceeding will not
     escalate or otherwise become material to our business in the future.

     Lease Commitments
     The following represents combined aggregate maturities for all of our
     financing and commitments under operating and capital leases as of June 30,
     2004 (unaudited, in thousands):


                                       9








                                                              Capital Lease        Total
                                            Operating Leases   Obligations      Commitments
                                            ----------------------------------------------------
                                                                               
Six months ending December 31, 2004                   $  104            $   8           $  112
Year ending December 31, 2005                            207               18              225
Year ending December 31, 2006                            207               15              222
Year ending December 31, 2007                            207                -              207
Year ending December 31, 2008                            207                -              207
Year ending December 31, 2009                            104                -              104
                                            ----------------------------------------------------
Total Commitments                                   $  1,036          $   41          $  1,077
          Less amount representing                         -              (5)              (5)
                          interest
                                            ----------------------------------------------------
            Present value of lease                  $  1,036          $   36          $  1,072
                       obligations
                                            ====================================================



     We have extended our building lease for a term of five years commencing on
     June 1, 2004 and expiring on May 31, 2009, with one conditional three-year
     renewal option, which if exercised, would extend the lease to May 31, 2012
     commencing with rent at ninety-five percent of fair market value.

     We lease certain of our equipment under various operating and capital
     leases that expire at various dates through 2006. The lease agreements
     frequently include renewal, escalation clauses and purchase provisions, and
     require us to pay taxes, insurance and maintenance costs. As of June 30,
     2004, we had $36,000 outstanding under a loan and security agreement, which
     is subject to an interest rate of 12.8%.

     As of June 30, 2004, we had a $3.0 million collateralized revolving line of
     credit with a bank, which was to expire in March 2005, pursuant to which we
     could borrow 100% against pledges of cash at the bank's prime rate. As of
     June 30, 2004, we had not drawn on this facility. On August 2, 2004, we
     secured from the same bank a new revolving line of credit to replace the
     previous credit facility. The new revolving line of credit provides for
     borrowings of up to $4.0 million and has a one year term. Borrowings under
     this line of credit agreement are collateralized by all of our assets and
     bear interest at the bank's prime rate plus 0.50%. Under the new facility
     we are required to maintain certain minimum cash and investment balances
     with the bank and meet certain other financial covenants. As of August 2,
     2004, we have not drawn down on the line of credit and were in compliance
     with the terms of the agreement.

     Product Warranties and Guarantor Arrangements

     We offer warranties on certain products and record a liability for the
     estimated future costs associated with warranty claims, which is based upon
     historical experience and our estimate of the level of future costs.
     Warranty costs are reflected in the Statement of Operations as a Cost of
     Sales. A reconciliation of the changes in our warranty liability during the
     periods presented is as follows (in thousands):

                                       10




                                                                    (Unaudited)
                                                ....................................................
                                                   Three months ended          Six months ended
                                                .........................   ........................
                                                  June 30,    June 30,       June 30,    June 30,
                                                    2004        2003           2004        2003
                                                -------------------------   ------------------------

                                                                                 
 Balance at beginning of period                       $ 23        $ 33           $ 24        $ 34
 Accruals for warranties issued during the               1           4              1          33
 period
 Actual warranty expense                                (2)         (6)            (3)        (36)
                                                -------------------------   ------------------------
 Balance at end of period                             $ 22        $ 31           $ 22        $ 31
                                                =========================   ========================



     As permitted under California law, and under the provisions of our articles
     of incorporation and by-laws, we are obligated to indemnify our officers
     and directors for certain events or occurrences while the officer or
     director is, or was, serving at our request in such capacity. The term of
     the indemnification period is for the officer's or director's lifetime. The
     maximum potential amount of future payments the Company could be required
     to make under these indemnification agreements is unlimited; however, we
     have a director and officer insurance policy that limits our exposure and
     enables us to recover a portion of any future amounts paid. As a result of
     our insurance policy coverage, we believe the estimated fair value of these
     indemnification agreements is minimal.


     We enter into standard indemnification agreements with our customers in the
     ordinary course of business. Pursuant to these agreements, we indemnify,
     hold harmless, and agree to reimburse the indemnified party for losses
     suffered or incurred by the indemnified party, generally our business
     partners or customers, in connection with any U.S. patent, or any copyright
     or other intellectual property infringement claim by any third party with
     respect to our products. The term of these indemnification agreements is
     generally perpetual following execution of the agreement. The maximum
     potential amount of future payments we could be required to make under
     these indemnification agreements is unlimited; however, we have never
     incurred claims or costs to defend lawsuits or settle claims related to
     these indemnification agreements.

9.       Stock Buyback:

     In the fourth quarter of 2002, our Board of Directors authorized us, from
     time to time, to repurchase at market prices, up to $2.3 million of our
     common stock and at a price not to exceed $1.20 per share, for cash in open
     market, negotiated or block transactions. The timing of such transactions
     will depend on market conditions, other corporate strategies and will be at
     the discretion of our management. No time limit was set for the completion
     of this program. At the time of the approval by the Board of Directors, we
     had approximately 4.8 million shares of common stock outstanding. During
     the fourth quarter of 2002, we repurchased from open market and negotiated
     transactions a total of approximately 1.6 million shares for approximately
     $1.8 million, at an average per share price of $1.10. During the first
     quarter of 2003, we repurchased from open market transactions a total of
     46,500 shares for $49,000, at an average per share price of $1.04. We have
     not repurchased any shares since the first quarter of 2003, but intend to
     continue to execute our buyback program as we determine necessary. The
     approximate dollar value of shares that may yet be repurchased under the
     plan was $420,000 as of June 30, 2004.



                                       11


10. Recent Accounting Pronouncements:

      In December 2003, the Financial Accounting Standards Board ("FASB") issued
     a revised FASB interpretation No. 46, "Consolidation for Variable Interest
     Entities, an interpretation of ARB No. 51" ("FIN 46R"). The FASB published
     the revision to clarify and amend some of the original provisions of FIN
     46, which was issued in January 2003, and to exempt certain entities from
     its requirements. A Variable Interest Entity ("VIE") refers to an entity
     subject to consolidation according to the provisions of the Interpretation.
     FIN 46R applies to entities whose equity investment at risk is insufficient
     to finance that entity's activities without receiving additional
     subordinated financial support provided by any parties, including equity
     holders, or where the equity investors (if any) do not have a controlling
     financial interest. FIN 46R provides that if an entity is the primary
     beneficiary of a VIE, the assets, liabilities, and results of operations of
     the VIE should be consolidated in the entity's financial statements. In
     addition, FIN 46R requires that both the primary beneficiary and all other
     enterprises with a significant variable interest in a VIE provide
     additional disclosures. The Company was required to adopt the provisions of
     FIN 46R in the Company's fiscal 2004 first quarter. The adoption of FIN 46R
     did not have a material impact on the Company's financial position or
     results of operations.









                                       12


                   SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS

This document contains forward-looking statements that involve risks and
uncertainties. Our operating results may vary significantly from quarter to
quarter due to a variety of factors, including changes in our product and
customer mix, constraints in our manufacturing and assembling operations,
shortages or increases in the prices of raw materials and components, changes in
pricing policy by us or our competitors, a slowdown in the growth of the
networking market, seasonality, timing of expenditures, and economic conditions
in the United States, Europe and Asia. Words such as "believes," "anticipates,"
"expects," "intends" and similar expressions are intended to identify
forward-looking statements, but are not the exclusive means of identifying such
statements. Unless the context otherwise requires, references in this Form 10-Q
to "we," "us," or the "Company" refer to Castelle. Readers are cautioned that
the forward-looking statements reflect management's analysis only as of the date
hereof, and we assume no obligation to update these statements. Actual events or
results may differ materially from the results discussed in the forward-looking
statements. Factors that might cause such a difference include, but are not
limited to the risks and uncertainties discussed herein, as well as other risks
set forth under the caption "Risk Factors" below and in our Annual Report on
Form 10-K for the year ended December 31, 2003.







                                       13


ITEM 2.    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
           RESULTS OF OPERATIONS

This Management's Discussion and Analysis of Financial Condition and Results of
Operations contains forward-looking statements that are subject to many risks
and uncertainties that could cause actual results to differ significantly from
expectations. For more information on forward-looking statements, refer to the
"Special Note on Forward-Looking Statements" prior to this section. The
following discussion should be read in conjunction with the unaudited Condensed
Consolidated Financial Statements and the Notes thereto included in Item 1 of
this Quarterly Report on Form 10-Q and our Form 10-K for the year ended December
31, 2003.


Critical Accounting Policies

Castelle's financial statements and accompanying notes are prepared in
accordance with generally accepted accounting principles in the United States of
America. Preparing financial statements requires management to make estimates
and assumptions that affect the reported amounts of assets, liabilities, sales
and expenses. These estimates and assumptions are affected by management's
application of accounting policies. Critical accounting policies for us include
revenue recognition; distributor programs and incentives; warranty; credit,
collection and allowances for doubtful accounts; inventories and related
allowance for obsolete and excess inventory; and income taxes, which are
discussed in more detail under the caption "Critical Accounting Policies" in our
2003 Annual Report on Form 10-K.

Consolidated Statements of Operations - As a Percentage of Net Sales



                                                  Three months ended                 Six months ended
                                          ................................  ................................
                                            June 30, 2004    June 30, 2003    June 30, 2004    June 30, 2003
                                          ----------------  --------------  ----------------  --------------

                                                                                        
 Net sales
    Products                                       77%             82%               78%             83%
    Services                                       23%             18%               22%             17%
                                          ----------------  --------------  ----------------  --------------
        Total net sales                           100%            100%              100%            100%

 Cost of sales                                     22%             23%               23%             25%
                                          ----------------  --------------  ----------------  --------------
     Gross profit                                  78%             77%               77%             75%
                                          ----------------  --------------  ----------------  --------------

 Operating expenses:
     Research and development                      15%             17%               16%             16%
     Sales and marketing                           33%             30%               32%             30%
     General and administrative                    19%             20%               19%             19%
                                          ----------------  --------------  ----------------  --------------
        Total operating expenses                   67%             67%               67%             65%
                                          ----------------  --------------  ----------------  --------------
 Income from operations                            11%            10%                10%             10%

     Interest income, net                           *               *                 *               *
     Other expense, net                             *             (1%)                *              (1%)
                                          ----------------  --------------  ----------------  --------------

 Income before provision for income taxes          11%              9%               10%              9%
     Provision for income taxes                     5%              *                 4%              *
                                          ----------------  --------------  ----------------  --------------
 Net income                                         6%              9%                6%              9%
                                          ================  ==============  ================  ==============



   *  Less than 1%


                                       14


Results of Operations

     Net Sales



                                         Three months ended                  Six months ended
                                  ................................  .................................
                                  June 30, 2004     June 30, 2003    June 30, 2004     June 30, 2003
                                -----------------  --------------   ---------------  ----------------
                                                                              
  Net sales
     Products                         $ 2,090         $ 2,050           $ 4,102           $ 4,151
     Services                             627             461             1,173               860
                                -----------------  --------------   ---------------  ----------------
        Total Net sales               $ 2,717         $ 2,511           $ 5,275           $ 5,011
                                =================  ==============   ===============  ================





                                                                 (Unaudited)
                                             ....................................................
                                                Three months ended          Six months ended
                                             .........................  .........................
                                               June 30,    June 30,      June 30,     June 30,
                                                 2004        2003          2004         2003
                                             -------------------------  -------------------------
                                                                           
Net Sales
   United States                                $ 2,305     $ 2,020       $ 4,435      $ 4,008
   Europe                                           148         153           332          328
   Pacific Rim                                      153         258           335          500
   Rest of Americas, excluding United States        111          80           173          175
                                             -------------------------  -------------------------
     Total Net Sales                            $ 2,717     $ 2,511       $ 5,275      $ 5,011
                                             =========================  =========================



              Net sales for the second quarter of 2004 increased 8% to $2.7
     million from $2.5 million in the same period in 2003. Net sales for the
     first six months of 2004 increased 5% to $5.3 million from $5.0 million for
     the same period in 2003.

              Product sales of $2.1 million for the second quarter of 2004 were
     relatively unchanged as compared to the same period in 2003. Product sales
     of $4.1 million for the six months of 2004 were also relatively unchanged
     as compared to the first six months of 2003.

              Service revenues are comprised primarily of extended warranty and
     support programs aw well as 60-days of maintenance bundled with initial
     product sales. Revenue related to these arrangements is recognized ratably
     over the period of the arrangement. Service revenues in the second quarter
     of 2004 increased 36% to $627,000 from $461,000 in the same period in 2003.
     For the first six months of 2004, service revenues increased 37% to $1.2
     million from $860,000 in the same period in 2003. The increase in service
     revenues was primarily due to increased sales of extended warranty
     contracts due to an increase in our installed customer base as well as the
     launch of our FaxPress Premier fax server products in the second half
     of 2003.

              Domestic sales in the second quarter of 2004 were $2.3 million, as
     compared to $2.0 million for the same period in 2003, representing 85% and
     81% of total net sales in the second quarter of 2004 and 2003,
     respectively. Domestic sales for the first six months of 2004 were $4.4
     million, as compared to $4.0 million for the same period of 2003, which
     represents 84% and 80% of total net sales in 2004 and 2003, respectively.
     The increase in sales was mostly attributable to sales of the new FaxPress
     Premier fax server products.

                                       15


              International sales (excluding sales to the rest of the Americas)
     for the second quarter of 2004 were $301,000 as compared to $411,000 in the
     second quarter of 2003. This represents 11% and 16% of net sales for 2004
     and 2003, respectively. International sales were $667,000 for the first six
     months of 2004, as compared to $828,000 for the same period in 2003, which
     represents 13% and 17% of total net sales for 2004 and 2003, respectively.
     The decline in sales was mostly due to lower sales of our fax server
     products.

              Sales to the rest of the Americas (excluding the United States) in
     the second quarter of 2004 were $111,000 as compared to $80,000 in the
     year-ago quarter, representing 4% and 3% of total net sales, respectively.
     The increase in sales was mostly due to sales of our fax server products.
     For the six months ended June 30, sales to the Rest of the Americas were
     173,000 and 175,000 for 2004 and 2003, respectively. This represents 3% of
     net sales for both periods.

     Cost of Sales; Gross Profit

              Gross profit was $2.1 million, or 78% of net sales, for the second
     quarter of 2004, as compared to $1.9 million, or 77% of net sales, for the
     same period in 2003. Gross profit for the first six months of 2004 and 2003
     was $4.0 million and $3.7 million, or 77% and 75% of net sales,
     respectively. Gross profit for the second quarter of 2004 included a
     benefit of $61,000, or 2% of net sales, due to adjustment of an estimated
     liability based on a settlement reached during the quarter.

              We are unable to provide the cost of sales separately for products
     and services as our internal financial reporting systems do not track this
     information in the reported periods.

     Research & Development

              Research and development expenses for the second quarter of 2004
     were $428,000, or 16% of net sales, as compared to $429,000 or 17% of net
     sales for the same period in 2003. For the first six months of 2004,
     research and development expenses were $842,000, as compared to $784,000 in
     the same period of 2003, or 16% of net sales for both periods. The increase
     of $58,000 was mostly attributable to higher compensation expenses relating
     to headcount additions.

     Sales & Marketing

              Sales and marketing expenses for the second quarter of 2004 were
     $892,000, or 33% of net sales, as compared to $760,000, or 30% of net
     sales, for the same period in 2003. Sales and marketing expenses were $1.7
     million for the first six months of 2004, and $1.5 million for the same
     period of 2003, which represents 32% and 30%, respectively, of net sales
     for the period. The increases for both the quarter and the six-month period
     of $132,000 and $191,000, respectively, were primarily due to an increase
     in compensation expense related to headcount additions.

     General & Administrative

              General and administrative expenses were $508,000 for the second
     quarter of 2004, or 19% of net sales, as compared to $509,000, or 20% of
     net sales for the second quarter of 2003. For the first six months of 2004,
     general and administrative expenses were $973,000, or 18% of net sales, as
     compared to $966,000, or 19% of net sales for the first six months of 2003.

                                       16


     Provision for Income Tax

              Prior to the fourth quarter of 2003, we had not reported
     significant income tax expenses because we had utilized available net
     operating loss (NOL) and tax credit carry-forwards. These NOLs were fully
     reserved by a valuation allowance due to uncertainty surrounding the
     likelihood of their realization. Due to our continued profitability and a
     determination that it is more likely than not that certain future tax
     benefits will be realized, a portion of the deferred tax assets were
     recognized in the fourth quarter of 2003. Beginning in 2004, for purposes
     of financial reporting, we are providing for income taxes at an effective
     tax rate of 40%. As a result, $121,000 of income tax expense has been
     provided in the second quarter of 2004 as compared to $2,000 in the second
     quarter of 2003. For the first six months of 2004, we have provided
     $219,000 for income taxes, as compared to $4,000 in 2003. However, for
     income tax purposes, we had $12.9 million of NOLs available at the end of
     December 2003 to offset future taxable income, and we do not expect to
     utilize significant amounts of cash for income tax payments until these
     NOLs have been utilized.


Liquidity and Capital Resources



                                              June 30, 2004   December 31, 2003       June 30, 2003
                                              -------------   -----------------       -------------
                                                             (dollars in thousands)
                                                                                  
Cash and cash equivalents                           $  4,842            $   4,614          $  3,663
Working capital                                     $  4,898            $   4,180          $  2,937
Working capital ratio                                    2.7                  2.4               2.1


         As of June 30, 2004, we had approximately $4.8 million of cash and cash
equivalents, an increase of $228,000 from December 31, 2003. Our operating
activities generated cash of $80,000 and $281,000 in the six month periods ended
June 30, 2004 and June 30, 2003, respectively. Cash generated in the six month
period ended June 30, 2004 was principally the result of net income in the
amount of $318,000, depreciation and amortization, deferred taxes and an
increase in accounts payable, offset in part by increases in inventories
(primarily due to our FaxPress Premier fax servers), accounts receivable,
prepaid expenses, and a decrease in accrued liabilities. Cash generated in the
six month period ended June 30, 2003 was primarily the result of net income in
the amount of $471,000, depreciation and amortization, a reduction in
inventories and an increase in accrued liabilities, offset partially by
increases in accounts receivables, and prepaid expenses, and decrease in
accounts payable.

         Our investing activities in the first six months of 2004 and 2003 were
for purchases of capital assets to replace obsolete computer equipment.

         We generated $163,000 from financing activities in the first six months
of 2004 as compared to $21,000 in the same period of 2003 primarily from
proceeds received from issuance of common stock, offset partially by repayment
of debt.

         In the fourth quarter of 2002, our Board of Directors authorized us,
from time to time, to repurchase at market prices, up to $2.3 million shares of
our common stock and at a price not to exceed $1.20 per share, for cash in open
market, negotiated or block transactions. The timing of these transactions has
depended and will depend on market conditions, other corporate strategies and
has been and will be at the discretion of our management. No time limit was set
for the completion of this program. Since the beginning of this program, we have
repurchased from open market and negotiated transactions a total of 1.7 million
shares for $1.8 million, at an average per share price of $1.10. We have not
repurchased any shares since the first quarter of 2003, but intend to continue
to execute our buyback program as we deem appropriate.

                                       17


         We have extended our lease for our corporate headquarters in Morgan
Hill, California. The modified lease on the Morgan Hill facility has a term of
five years, commencing on June 1, 2004 and expiring in May 31, 2009, with one
conditional three-year renewal option, which if exercised, would extend the
lease to May 2012 commencing with rent at 95% of fair market value. As of June
30, 2004, future minimum payments under the lease were $1.0 million.

         In December 2000, as a source of capital asset financing, we entered
into a loan and security agreement with a finance company for an amount of
$75,000. This loan bears interest at 12.8% and is repayable by December 2006. As
of June 30, 2004, the aggregate value of future minimum payments was $41,000.

         The following represents combined aggregate maturities for all our
financing and commitments as of June 30, 2004:


                                                                Payments Due by Period
                                          --------- ------------- -------------- ------------- --------------
Contractual Obligations                    Total       1 Year      2 - 3 Years   4 - 5 Years    More than 5
                                                                                                   Years
                                          --------- ------------- -------------- ------------- --------------
                                                                                           
Capital (Finance) Lease Obligations         $   41        $   18         $   23             -              -
Operating Lease Obligations                 $1,036        $  207         $  415        $  414              -
                                          --------- ------------- -------------- ------------- --------------
Total contractual cash obligations          $1,077        $  225         $  438        $  414              -
                                          ========= ============= ============== ============= ==============



        As of June 30, 2004, we had a $3.0 million collateralized revolving line
of credit with a bank which was to expire in March 2005, pursuant to which we
could borrow 100% against pledges of cash at the bank's prime rate.
 As of June 30, 2004, we had not drawn on this facility. On August 2, 2004, we
secured from the same bank a new revolving line of credit to replace the
previous credit facility. The new revolving line of credit provides for
borrowings of up to $4.0 million and has a one year term. Borrowings under this
line of credit agreement are collateralized by all of our assets and bear
interest at the bank's prime rate plus 0.50%. Under the new facility we are
required to maintain certain minimum cash and investment balances with the bank
and meet certain other financial covenants. As of August 2, 2004, we have not
drawn down on the line of credit and were in compliance with the terms of the
agreement.

         We believe that our existing cash balances and anticipated cash flows
from operations will be sufficient to meet our anticipated capital requirements
for the next 12 months. If we have a need for additional capital resources, we
may be required to sell additional equity or debt securities, secure additional
lines of credit or obtain other third party financing. The timing and amount of
such capital requirements cannot be determined at this time and will depend on a
number of factors, including demand for our existing and new products, if any,
and changes in technology in the networking industry. There can be no assurance
that such additional financing will be available on satisfactory terms when
needed, if at all. Failure to raise such additional financing, if needed, may
result in our inability to achieve our long-term business objectives. To the
extent that additional capital is raised through the sale of additional equity
or convertible debt securities, the issuance of such securities would result in
additional dilution to our shareholders.

         In addition, because we are dependent on a small number of distributors
for a significant portion of the sales of our products, the loss of any of our
major distributors or their inability to satisfy their payment obligations to us
could have a significant adverse effect on our business, operating results and
financial condition.

                                       18


         We believe that, for the periods presented, inflation has not had a
material effect on our operations.


Recent Accounting Pronouncements:


         In December 2003, the FASB issued a revised FASB interpretation No. 46,
"Consolidation for Variable Interest Entities, an interpretation of ARB No. 51"
("FIN 46R"). The FASB published the revision to clarify and amend some of the
original provisions of FIN 46, which was issued in January 2003, and to exempt
certain entities from its requirements. A Variable Interest Entity ("VIE")
refers to an entity subject to consolidation according to the provisions of the
Interpretation. FIN 46R applies to entities whose equity investment at risk is
insufficient to finance that entity's activities without receiving additional
subordinated financial support provided by any parties, including equity
holders, or where the equity investors (if any) do not have a controlling
financial interest. FIN 46R provides that if an entity is the primary
beneficiary of a VIE, the assets, liabilities, and results of operations of the
VIE should be consolidated in the entity's financial statements. In addition,
FIN 46R requires that both the primary beneficiary and all other enterprises
with a significant variable interest in a VIE provide additional disclosures.
The provisions of FIN 46R are effective for our fiscal 2004 first quarter. The
adoption of FIN 46R did not have a material impact on our financial position or
results of operations.









                                       19


                                  RISK FACTORS

         Shareholders or investors considering the purchase of shares of our
common stock should carefully consider the following risk factors, in addition
to other information in this Quarterly Report on Form 10-Q and in our Annual
Report on Form 10-K for the year ended December 31, 2003. Additional risks and
uncertainties not presently known to us or that we currently deem immaterial
also may impair our business operations

Our revenue and operating results have fluctuated in the past and are likely to
fluctuate significantly in the future, particularly on a quarterly basis.

         Our operating results may vary significantly from quarter to quarter
due to many factors, some of which are outside our control. For example, the
following conditions could all affect our results:

 O       changes in our product sales and customer mix;
 O       constraints in our manufacturing and assembling operations;
 O       shortages or increases in the prices of raw materials and components;
 O       changes in pricing policy by us or our competitors;
 O       a slowdown in the growth of the networking market;
 O       seasonality;
 O       timing of expenditures; and
 O       economic conditions in the United States, Europe and Asia.

         Our sales often reflect orders shipped in the same quarter in which
they are received. In addition, significant portions of our expenses are
relatively fixed in nature, and planned expenditures are based primarily on
sales forecasts. Therefore, if we inaccurately forecast demand for our products,
the impact on net income may be magnified by our inability to adjust spending
quickly enough to compensate for the net sales shortfall.

         Other factors contributing to fluctuations in our quarterly operating
results include:

 O       changes in the demand for our products;
 O       customer order deferrals in anticipation of new versions of our
         products;
 O       the introduction of new products and product enhancements by us or our
         competitors;
 O       the effects of filling the distribution channels following
         introductions of new products and product enhancements;
 O       potential delays in the availability of announced or anticipated
         products;
 O       the mix of product and revenue derived from the sale of extended
         warranty contracts;
 O       the commencement or conclusion of significant development contracts;
 O       changes in foreign currency exchange rates; and
 O       the timing of significant marketing and sales promotions.

         Based on the foregoing, we believe that quarterly operating results are
likely to vary significantly in the future and that period-to-period comparisons
of our results of operations are not necessarily meaningful and should not be
viewed as indications of future performance.

                                       20


We have a history of losses and a large accumulated deficit.

         We have experienced significant operating losses and, as of June 30,
2004, had an accumulated deficit of $22.2 million. Our development and marketing
of current and new products will continue to require substantial expenditures.
We incurred $591,000 of losses in 2001 attributable to a slowdown in demand for
our products due in part to industry-wide adverse economic factors. We have been
profitable since the third quarter of 2001, with total net income of $659,000 in
2002 and $1.6 million in 2003, and $318,000 for the first six months in 2004.
There can be no assurance that growth in net sales will be achieved or
profitability sustained in future years.

Substantially all of our revenue comes from the sale of fax server products, and
a decline in demand for those products would harm our business, operating
results and financial condition.

         We derive substantially all of our revenue from the sale of fax and
print server products, with fax server products accounting for 97% of total
sales in 2003 and almost all sales in the first six months of 2004. We expect
that our current products will continue to account for most of our sales in the
near future. A decline in demand for our fax server products as a result of
competition, technological change, shortages of components or other factors, or
a delay in the development and market acceptance of new features and products,
would have a material adverse effect on our business, operating results and
financial condition.

We sell our products through a limited number of distributors, and any
deterioration in our relationship with those distributors would harm our
business, operating results and financial condition.

         We sell our products primarily through a two-tier domestic and
international distribution network. Our distributors sell our products to VARs,
e-commerce vendors and other resellers. The distribution of personal computers
and networking products has been characterized by rapid change, including
consolidations due to the financial difficulties of distributors and the
emergence of alternative distribution channels. An increasing number of
companies are competing for access to these channels. Our distributors typically
represent other products that are complementary to, or compete with, our
products. Our distributors are not contractually committed to future purchases
of our products and could discontinue carrying our products at any time for any
reason. In addition, because we are dependent on a small number of distributors
for a significant portion of the sales of our products, the loss of any of our
major distributors or their inability to satisfy their payment obligations to us
could have a significant adverse effect on our business, operating results and
financial condition. We have a stock rotation policy with certain of our
distributors that allows them to return marketable inventory against offsetting
orders. If we reduce our prices, we credit certain distributors for the
difference between the purchase price of products remaining in their inventory
and our reduced price for these products. In addition, inventory levels of our
products held by distributors could become excessive due to industry conditions
or the actions of competitors, resulting in product returns and inventory
write-downs.

The market for our products is affected by rapidly changing technology and if we
fail to predict and respond to customers' changing needs, our business,
operating results and financial condition may suffer.

         The market for our products is affected by rapidly changing networking
technology, evolving industry standards and the Internet and other new
communication technologies. We believe that our future success will depend upon
our ability to enhance our existing products and to identify, develop,
manufacture and introduce new products that:

                                       21


 O      conform to or support emerging network telecommunications standards;
 O      are compatible with a growing array of computer and peripheral devices;
 O      support popular computer and network operating systems and applications;
 O      meet a wide range of evolving user needs; and
 O      achieve market acceptance.

        There can be no assurance that we will be successful in these efforts.

         We have incurred, and expect to continue to incur, substantial expenses
associated with the introduction and promotion of new products. There can be no
assurance that the expenses incurred will not exceed research and development
cost estimates or that new products will achieve market acceptance and generate
sales sufficient to offset development costs. In order to develop new products
successfully, we are dependent upon timely access to information about new
technological developments and standards. There can be no assurance that we will
have such access or will be able to develop new products successfully and
respond effectively to technological change or new product announcements by
others.

         Complex products such as those offered by us may contain undetected or
unresolved hardware defects or software errors when they are first introduced or
as new versions are released. Changes in our or our suppliers' manufacturing
processes or the inadvertent use of defective components could adversely affect
our ability to achieve acceptable manufacturing yields and product reliability.
We have in the past discovered hardware defects and software errors in certain
of our new products and enhancements after their introduction. Replacement of
discontinued components used in our products could lead to further defects and
errors. There can be no assurance that despite testing by us and by third-party
test sites, errors and defects will not be found in future releases of our
products, which would result in adverse product reviews and negatively affect
market acceptance of these products.

         The introduction of new or enhanced products requires us to manage the
transition from the older products to the new or enhanced products or versions,
both internally and for customers. We must manage new product introductions so
as to minimize disruption in customer ordering patterns, avoid excessive levels
of older product inventories and ensure that adequate supplies of new products
can be delivered to meet customer demands. We have from time to time experienced
delays in the shipment of new products. There can be no assurance that we will
successfully manage future product transitions.

Our success depends upon the continued contributions of our key management,
marketing, product development and operational personnel.

         Our success will depend, to a large extent, upon our ability to retain
and continue to attract highly skilled personnel in management, marketing,
product development and operations. Competition for employees in the computer
and electronics industries is intense, and there can be no assurance that we
will be able to attract and retain enough qualified employees. Volatility or
lack of positive performance in our stock price may also adversely affect our
ability to retain and continue to attract key employees, many of whom have been
granted stock options. Our inability to retain and attract key employees could
have a material adverse effect on our product development, business, operating
results and financial condition. We do not carry key person life insurance with
respect to any of our personnel.

                                       22


The markets for our products are highly competitive and may become more
competitive in the future.

         The network enhancement products and computer software markets are
highly competitive, and we believe that competition will intensify in the
future. The competition is characterized by rapid change and improvements in
technology along with constant pressure to reduce the prices of products. We
currently compete principally in the market for network fax servers, network
print servers and fax-on-demand software. Both direct and indirect competition
could adversely affect our business and operating results through pricing
pressure, loss of market share and other factors. In particular, we expect that,
over time, average selling prices for our print server products will continue to
decline, as the market for these products becomes increasingly competitive. Any
material reduction in the average selling prices of our products would adversely
affect gross margins. There can be no assurance we will be able to maintain the
current average selling prices of our products or the related gross margins.

         The principal competitive factors affecting the market for our products
include:

          O       product functionality;
          O       performance;
          O       quality;
          O       reliability;
          O       ease of use;
          O       quality of customer training and support;
          O       name recognition;
          O       price; and
          O       compatibility and conformance with industry standards and
                  changing operating system environments.

         Several of our existing and potential competitors have substantially
greater financial, engineering, manufacturing and marketing resources than us.
We also experience competition from a number of other software, hardware and
service companies. In addition to our current competitors, we may face
substantial competition from new entrants into the network enhancement market,
including established and emerging computer, computer peripheral, communications
and software companies. In the fax server market we compete with companies such
as Captaris Inc., Omtool, Ltd. and Esker Software. There can be no assurance
that competitors will not introduce products incorporating technology more
advanced than the technology used by us in our products. In addition, certain
competing methods of communications such as the Internet or electronic mail
could adversely affect the market for fax products. Certain of our existing and
potential competitors in the print server market are manufacturers of printers
and other peripherals, and these competitors may develop closed systems
accessible only through their own proprietary servers. There can be no assurance
that we will be able to compete successfully or that competition will not have a
material adverse effect on our business, operating results and financial
condition.

We depend on sales in foreign markets, and political or economic changes in
these markets could affect our business, operating results and financial
condition.

         Sales to customers located outside the United States accounted for
approximately 19%, 21% and 25% of our net sales in 2003, 2002 and 2001,
respectively. We sell our products in approximately 44 foreign countries through
approximately 89 distributors. Our principal Japanese distributor accounted for
approximately 38%, 27% and 40% of our international sales in 2003, 2002 and
2001, respectively, and 7%, 6% and 10% of our total net sales in 2003, 2002 and
2001, respectively. We expect that international sales will continue to
represent a significant portion of


                                       23


our  product  revenues  and  that we will be  subject  to the  normal  risks  of
international sales, such as export laws, currency fluctuations,  longer payment
cycles,   greater  difficulties  in  accounts  receivable  collections  and  the
requirement  of complying  with a wide variety of foreign laws.  There can be no
assurance  that we will not  experience  difficulties  resulting from changes in
foreign laws relating to the export of our products in the future.  In addition,
because we primarily  invoice  foreign sales in U.S.  dollars,  fluctuations  in
exchange  rates could affect demand for our products by causing prices to be out
of line  with  products  priced in the local  currency.  Additionally,  any such
difficulties would have a material adverse effect on our international sales and
a resulting  material  adverse  effect on our  business,  operating  results and
financial  condition.  We may  experience  fluctuations  in European  sales on a
quarterly  basis because  European  sales may be weaker during the third quarter
than the second  quarter due to extended  holiday  shutdowns in July and August.
There  can be no  assurance  that  we will be able  to  maintain  the  level  of
international  sales in the future. Any fluctuations in international sales will
significantly affect our operating results and financial condition.

The introduction of new products may reduce the demand for our existing products
and increase returns of existing products.

         From time to time, we may announce new products, product versions,
capabilities or technologies that have the potential to replace or shorten the
life cycles of existing products. The release of a new product or product
version may result in the write-down of products in inventory if this inventory
becomes obsolete. We have in the past experienced increased returns of a
particular product version following the announcement of a planned release of a
new version of that product. There can be no assurance that product returns will
not exceed our allowance for these returns in the future and will not have a
material adverse effect on our business, operating results and financial
condition.

If we fail to obtain components of our products from third-party suppliers and
subcontractors, our business could suffer.

         Our products require components procured from third-party suppliers.
Some of these components are available only from a single source or from limited
sources. In addition, we subcontract a substantial portion of our manufacturing
to third parties, and there can be no assurance that these subcontractors will
be able to support our manufacturing requirements. We purchase components on a
purchase order basis, and generally have no long-term contracts for these
components. If we are unable to obtain a sufficient supply of high-quality
components from our current sources, we could experience delays or reductions in
product shipments. From time to time, component manufacturers announce the end
of life of certain of their products and may or may not have replacement
products. If we are unable to secure enough inventories of the end-of-life
components or their replacements, we might not be able to deliver our products
to our customers and could adversely affect our revenue and net income.
Furthermore, a significant increase in the price of one or more of these
components or our inability to lower component or sub-assembly prices in
response to competitive price reductions could adversely affect our gross
margin.

We depend on proprietary technology, and inability to develop and protect this
technology or license it from third parties could adversely affect our business,
operating results and financial condition.

         Our success depends to a certain extent upon our technological
expertise and proprietary software technology. We rely upon a combination of
contractual rights and copyright, trademark and trade secret laws to establish
and protect our technologies. Despite the precautions taken by us, it may be

                                       24


possible for unauthorized third parties to copy our products or to reverse
engineer or obtain and use information that we regard as proprietary. In
addition, the laws of some foreign countries either do not protect our
proprietary rights or offer only limited protection. Given the rapid evolution
of technology and uncertainties in intellectual property law in the United
States and internationally, there can be no assurance that our current or future
products will not be subject to third-party claims of infringement. Any
litigation to determine the validity of any third-party claims could result in
significant expense and divert the efforts our technical and management
personnel, whether or not any litigation is determined in favor of us. In the
event of an adverse result in litigation, we could be required to expend
significant resources to develop non-infringing technology or to obtain licenses
to the technology that is the subject of the litigation. There can be no
assurance that we would be successful in this development or that any such
licenses would be available on commercially reasonable terms. We also rely on
technology licensed from third parties. There can be no assurance that these
licenses will continue to be available upon reasonable terms, if at all. Any
impairment or termination of our relationship with third-party licensors could
have a material adverse effect on our business, operating results and financial
condition. There can be no assurance that our precautions will be adequate to
deter misappropriation or infringement of our proprietary technologies.

         We have received, and may receive in the future, communications
asserting that our products infringe the proprietary rights of third parties or
seeking indemnification against the alleged infringement. There can be no
assurance that third parties will not assert infringement claims against us with
respect to current or future products or that any assertion may not require us
to enter into royalty arrangements or result in costly litigation. Any claims,
with or without merit, can be time consuming and expensive to defend. There can
be no assurance that any intellectual property litigation will not have a
material adverse effect on our business, operating results and financial
condition.

Our common stock is listed on the Nasdaq SmallCap Market, and we have had
difficulty satisfying the listing criteria to avoid the delisting of our common
stock.

         Our common stock has been listed on the Nasdaq SmallCap Market since
April 1999. In order to maintain our listing on the Nasdaq SmallCap Market, we
must maintain total assets, capital and public float at specified levels, and
our common stock generally must maintain a minimum bid price of $1.00 per share.
If we fail to maintain the standards necessary to be quoted on the Nasdaq
SmallCap Market, our common stock could become subject to delisting. There can
be no assurance that we will be able to maintain the $1.00 minimum bid price per
share of our common stock and thus maintain our listing on the Nasdaq SmallCap
Market. We have traded below $1.00 as recently as December 2002.

         If our common stock is delisted, trading in our common stock could be
conducted on the OTC Bulletin Board or in the over-the-counter market in what is
commonly referred to as the "pink sheets." If this occurs, a shareholder will
find it more difficult to dispose of our common stock or to obtain accurate
quotations as to the price of our common stock. Lack of any active trading
market would have an adverse effect on a shareholder's ability to liquidate an
investment in our common stock easily and quickly at a reasonable price. It
might also contribute to volatility in the market price of our common stock and
could adversely affect our ability to raise additional equity or debt financing
on acceptable terms or at all. Failure to obtain desired financing on acceptable
terms could adversely affect our business, financial condition and results of
operations.

                                       25


Our stock price has been volatile, and is likely to continue to be volatile in
the future.

         The price of our common stock has fluctuated widely in the past. Sales
of substantial amounts of our common stock, or the perception that sales could
occur, could adversely affect prevailing market prices for our common stock. Our
management believes past fluctuations may have been caused by the factors
identified above, and that these factors may continue to affect the market price
of our common stock. Additionally, stock markets have experienced extreme price
volatility in recent years. This volatility has had a substantial effect on the
market price of the common stock of us and other high technology companies,
often for reasons unrelated to operating performance. We anticipate that prices
for our common stock may continue to be volatile. Future stock price volatility
may result in the initiation of securities litigation against us, which may
divert substantial management and financial resources and have an adverse effect
on our business, operating results and financial condition.

We may require additional capital in the future, and may be unable to obtain
this capital at all or on commercially reasonable terms.

         The development and marketing of products requires significant amounts
of capital. If we need additional capital resources, we may be required to sell
additional equity or debt securities, secure additional lines of credit or
obtain other third party financing. The timing and amount of such capital
requirements cannot be determined at this time and will depend on a number of
factors, including demand for our existing and new products and changes in
technology in the networking industry. There can be no assurance that additional
financing will be available on satisfactory terms when needed, if at all.
Failure to raise such additional financing, if needed, may result in our
inability to achieve our long-term business objectives. The issuance of equity
or convertible debt securities to raise additional capital would result in
additional dilution to our shareholders.

Government regulation could increase our costs of doing business and adversely
affect our gross margin.

         Certain aspects of the networking industry in which we compete are
regulated both in the United States and in foreign countries. Imposition of
public carrier tariffs, taxation of telecommunications services and the
necessity of incurring substantial costs and expenditure of managerial resources
to obtain regulatory approvals, or the inability to obtain regulatory approvals
within a reasonable period of time, could have a material, adverse effect on our
business, operating results and financial condition. This is particularly true
in foreign countries where telecommunications standards differ from those in the
United States. Our products must comply with a variety of equipment, interface
and installation standards promulgated by communications regulatory authorities
in different countries. Changes in government policies, regulations and
interface standards could require the redesign of products and result in product
shipment delays which could have a material, adverse impact on our business,
operating results and financial condition.

Recent FASB Exposure Draft on Share-Based Payments may have a significant effect
on our Results of Operations, if adopted.


         During March 2004, the FASB issued a proposed Statement, "Share-Based
Payment, and amendment of FASB Statements No. 123 and 95". The proposed
Statement addresses the accounting for share-based payment transactions in which
a company receives employee services in exchange for equity instruments of the
company that are based on the fair values of the company's equity instruments or
that may be settled by the issuance of such equity instruments. The proposed
statement eliminates the treatment for share-based transactions using APB

                                       26


Opinion No. 25, "Accounting for Stock Issued to Employees," and generally would
require that such transactions be accounted for using a fair-value-based method
and recognized as expenses in our statement of income. The proposed standard
would require the modified prospective method be used, which would require that
the fair value of new awards granted from the beginning of the year of adoption
plus unvested awards at the date of adoption be expensed over the vesting term.
In addition, the proposed statement encourages companies to use the "binomial"
approach to value stock options, as opposed to the Black-Scholes option pricing
model that is currently being used for the fair value of our options.

         The effective date the proposed standard is recommending is for fiscal
years beginning after December 15, 2004. Should the proposed statement be
finalized, it will have a significant impact on our consolidated statement of
operations as we will be required to expense the fair value of our stock options
rather than disclosing the impact on our consolidated net income within our
footnotes (See Note 4 of the notes to the condensed consolidated financial
statements).

The costs of compliance with recent developments in corporate governance
regulation may affect our business, operating results and financial condition in
ways that presently cannot be predicted.

         Beginning with the enactment of the Sarbanes-Oxley Act of 2002, a
significant number of new corporate governance requirements have been adopted or
proposed through legislation and regulation by the Securities and Exchange
Commission and Nasdaq National Stock Market. We may not be successful in
complying with these requirements at all times in the future. Additionally, we
expect these developments to increase our legal compliance and accounting costs,
and to make some activities more difficult, such as stockholder approval of new
stock option plans. We expect these developments to make it more difficult and
more expensive for us to obtain director and officer liability insurance, and we
may be required to accept reduced coverage or incur substantially higher costs
to obtain coverage. These developments could make it more difficult for us to
attract and retain qualified members of our Board of Directors, or qualified
executive officers. We are presently evaluating and monitoring regulatory
developments and cannot estimate the timing or magnitude of additional costs we
may incur as a result, or the effect that these increased costs may have on our
operating results.

Recent terrorist activity in the United States and the military action to
counter terrorism could adversely impact our business.

         Terrorist acts or acts of war (wherever located around the world) could
significantly impact our revenue, costs and expenses, and financial condition.
The terrorist attacks that took place in the United States on September 11, 2001
have created many economic and political uncertainties, some of which may
materially harm our business, operating results and financial condition. The
long-term effects on our business of the September 11, 2001 attacks and the
ensuing war on terror are unknown. The potential for future terrorist attacks,
the national and international responses to terrorist attacks or perceived
threats to national security, and other actual or potential conflicts, acts of
war or hostility, including the United States' activities in Iraq, have created
many economic and political uncertainties that could adversely affect our
business, operating results and financial condition in ways that cannot
presently be predicted.

Provisions in our charter documents might deter a company from acquiring us,
which could inhibit your ability to receive an acquisition premium for your
shares.

         Our Board of Directors has authority to issue shares of preferred stock
and to fix the rights, including voting rights, of these shares without any
further vote or action by the shareholders. The rights of the holders of our
common stock will be subject to, and may be adversely affected by, the


                                       27


rights of the holders of any  preferred  stock that may be issued in the future.
The  issuance of preferred  stock,  while  providing  desirable  flexibility  in
connection with possible  acquisitions and other corporate purposes,  could have
the effect of making it more  difficult  for a third party to acquire a majority
of our outstanding  voting stock,  thereby  delaying,  deferring or preventing a
change in control.  Furthermore,  such  preferred  stock may have other  rights,
including  economic  rights,  senior to the common stock,  and as a result,  the
issuance thereof could have a material adverse effect on the market.

Voting control by officers, directors and affiliates may delay, defer or prevent
a change of control.

         At July 28, 2004, our officers and directors and their affiliates
beneficially owned approximately 26% of the outstanding shares of common stock.
Accordingly, together they had the ability to significantly influence the
election of our directors and other corporate actions requiring shareholder
approval. Such concentration of ownership may have the effect of delaying,
deferring or preventing a change in control.

ITEM 3.     QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

         We had no holdings of derivative financial or commodity instruments at
June 30, 2004. However, we are exposed to financial market risks, including
changes in interest rates and foreign currency exchange rates. While much of our
revenue is transacted in U.S. dollars, some revenues and capital spending are
transacted in Pounds Sterling. These amounts are not currently material to our
financial statements. Therefore, we believe that foreign currency exchange rates
should not materially affect our overall financial position, results of
operations or cash flows. The fair value of our money market accounts or related
income would not be significantly impacted by increases or decreases in interest
rates due mainly to the highly liquid nature of this investment. However, sharp
declines in interest rates could seriously harm interest earnings.


ITEM 4.  CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

         Regulations under the Securities Exchange Act of 1934 require public
companies, including our company, to maintain "disclosure controls and
procedures," which are defined to mean a company's controls and other procedures
that are designed to ensure that information required to be disclosed in the
reports that it files or submits under the Securities Exchange Act of 1934 is
recorded, processed, summarized, and reported, within the time periods specified
in the Securities and Exchange Commission's rules and forms. Our Chief Executive
Officer and our Chief Financial Officer, based on their evaluation of our
disclosure controls and procedures as of the end of the period covered by this
report, concluded that our disclosure controls and procedures were effective for
this purpose.

         Regulations under the Securities Exchange Act of 1934 require public
companies, including our company, to evaluate any change in our "internal
control over financial reporting," which is defined as a process to provide
reasonable assurance regarding the reliability of financial reporting and
preparation of financial statements for external purposes in accordance with
accounting principles generally accepted in the United States. In connection
with their evaluation of our disclosure controls and procedures as of the end of
the period covered by this report, our Chief Executive Officer and Chief
Financial Officer did not identify any change in our internal control over
financial reporting during the three-month period ended June 30, 2004 that
materially affected, or is reasonably likely to materially affect, our internal
control over financial reporting.





                                       28


                           PART II - OTHER INFORMATION


ITEM 1.    LEGAL PROCEEDINGS

           None.


ITEM 2.    CHANGES IN SECURITIES AND USE OF PROCEEDS

           None.


ITEM 3.    DEFAULTS UPON SENIOR SECURITIES

           None.


ITEM 4.    SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

           None.


ITEM 5.    OTHER INFORMATION

           None.


ITEM 6.     EXHIBITS AND REPORTS ON FORM 8-K

            (a) Exhibits:

                  Additional Exhibit

                  In accordance with SEC Release No. 33-8212, Exhibits 32.1 and
                  32.2 are to be treated as "accompanying" this report rather
                  than "filed" as part of the report.

                  10.1     Amended commercial lease agreement dated June 1, 2004
                           by and between Registrant and Kyung S. Lee and
                           Ieesun Kim Lee.

                  10.2     Loan and Security Agreement with Silicon Valley Bank.

                  31.1     Certification pursuant to 18 U.S.C. Section 1350, as
                           adopted pursuant to Section 302 of the Sarbanes-Oxley
                           Act of 2002, executed by Scott C. McDonald, Chief
                           Executive Officer and President of Castelle.

                  31.2     Certification pursuant to 18 U.S.C. Section 1350, as
                           adopted pursuant to Section 302 of the Sarbanes-Oxley
                           Act of 2002, executed by Paul Cheng, Chief Financial
                           Officer of Castelle.

                  32.1     Certification pursuant to 18 U.S.C. Section 1350, as
                           adopted pursuant to Section 906 of the Sarbanes-Oxley
                           Act of 2002, executed by Scott C. McDonald, Chief
                           Executive Officer and President of Castelle.

                  32.2     Certification pursuant to 18 U.S.C. Section 1350, as
                           adopted pursuant to Section 906 of the Sarbanes-Oxley
                           Act of 2002, executed by Paul Cheng, Chief Financial
                           Officer of Castelle.

                                       29


            (b) Reports on Form 8-K

                  Castelle filed a Form 8-K on April 22, 2004. Furnished under
                  Item 7, "Financial Statements and Exhibits", Castelle filed a
                  press release regarding its financial results for the quarter
                  ended March 31, 2004.








                                       30


                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


CASTELLE

By:   /s/ Scott C. McDonald                                Date: August 11, 2004
      Scott C. McDonald
      Chief Executive Officer and President
      (Principal Executive Officer)

By:   /s/ Paul Cheng                                       Date: August 11, 2004
      Paul Cheng
      Vice President of Finance and Administration
      Chief Financial Officer
      (Principal Financial Officer and Principal Accounting Officer)





                                       31