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 March 31, 2005

          |_| 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 April 30, 2005 was
3,849,319.

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



                                       1




                                    CASTELLE
                                Table of Contents
                                                                                                               PAGE

                                                                                                              
  PART I - FINANCIAL INFORMATION..................................................................................3

     ITEM 1.   CONDENSED CONSOLIDATED FINANCIAL STATEMENTS........................................................3

               CONDENSED CONSOLIDATED BALANCE SHEETS..............................................................3

               CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS......................................................4

               CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS....................................................5

               NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS...............................................6

     SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS..................................................................13

     ITEM 2.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.............14

     ITEM 3.   QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK.........................................27

     ITEM 4.  CONTROLS AND PROCEDURES............................................................................27

  PART II - OTHER INFORMATION....................................................................................29

     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.....................................................................................................30

  CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002.......................................E-1

  CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002.......................................E-2

  CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 
  2002..........................................................................................................E-3

  CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 
  2002..........................................................................................................E-4




                                       2



PART I - FINANCIAL INFORMATION

ITEM 1.    CONDENSED CONSOLIDATED FINANCIAL STATEMENTS



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

                                                                      March 31, 2005         December 31, 2004
                                                                        (unaudited)

                                                                  ----------------------   --------------------
                                                                                                  
Assets:
   Current assets:
     Cash and cash equivalents                                             $   5,914               $  5,599
     Accounts receivable, net of allowance for doubtful accounts
        of $27 and $30, respectively                                             831                    857
     Inventories                                                               1,672                  1,785
     Prepaid expenses and other current assets                                   184                    130
     Deferred taxes                                                              231                    231
                                                                  ----------------------   --------------------
        Total current assets                                                   8,832                  8,602
   Property and equipment, net                                                   208                    203
   Other non-current assets                                                       47                     50
   Deferred taxes, non-current                                                 1,292                  1,292
                                                                  ----------------------   --------------------
        Total assets                                                       $  10,379              $  10,147
                                                                  ======================   ====================

Liabilities and Shareholders' Equity:
   Current liabilities:
     Long-term debt, current portion                                       $      15              $      15
     Accounts payable                                                            209                    511
     Accrued liabilities                                                       1,430                  1,073
     Deferred revenue                                                          1,256                  1,253
                                                                  ----------------------   --------------------
        Total current liabilities                                              2,910                  2,852
         Long term debt, net of current portion                                   10                     14
                                                                  ----------------------   --------------------
        Total liabilities                                                      2,920                  2,866
                                                                  ----------------------   --------------------

   Shareholders' equity:
     Common stock, no par value:
        Authorized:  25,000 shares
        Issued and outstanding: 3,841 and 3,799, respectively                 27,711                 27,668
     Accumulated deficit:                                                    (20,252)               (20,387)
                                                                  ----------------------   --------------------
        Total shareholders' equity                                             7,459                  7,281
                                                                  ----------------------   --------------------
        Total liabilities and shareholders' equity                         $  10,379              $  10,147
                                                                  ======================   ====================


     See accompanying notes to condensed consolidated financial statements.


                                       3






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


                                                                Three months ended
                                                       ......................................
                                                         March 31, 2005      March 31, 2004
                                                       -----------------   ------------------
                                                                                
Sales:
   Products                                                  $ 1,893              $ 2,012
   Services                                                      701                  527
                                                       -----------------   ------------------
       Total net sales                                         2,594                2,539

Cost of sales:
   Products                                                      542                  639
   Services                                                      270                  198
                                                       -----------------   ------------------
       Total cost of sales                                       812                  837

                                                       -----------------   ------------------
    Gross profit                                               1,782                1,702
                                                       -----------------   ------------------

Operating expenses:
    Research and development                                     439                  414
    Sales and marketing                                          598                  595
    General and administrative                                   635                  465
                                                       -----------------   ------------------
       Total operating expenses                                1,672                1,474
                                                       -----------------   ------------------
Income from operations:                                          110                  228

    Interest income, net                                          25                    3
    Other expense, net                                            -                    (4)
                                                       -----------------   ------------------
Income before provision for income taxes                         135                  227
    Provision for income taxes                                     -                   98
                                                       -----------------   ------------------
Net income                                                    $  135              $   129
                                                       =================   ==================

Earnings per share:
   Net income per common share - basic                        $ 0.04              $  0.04
   Net income per common share - diluted                      $ 0.03              $  0.03

   Shares used in per share calculation - basic                3,820                3,499
   Shares used in per share calculation - diluted              4,465                4,450


     See accompanying notes to condensed consolidated financial statements.



                                       4




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


                                                                               Three months ended
                                                                     ......................................
                                                                       March 31, 2005      March 31, 2004
                                                                     -----------------   ------------------
                                                                                              
Cash flows from operating activities:
     Net income                                                             $  135              $   129
     Adjustment to reconcile net income to net cash provided by
      (used in) operating activities:
       Depreciation and amortization                                            47                   52
       Provision for doubtful accounts                                          (3)                 (15)
       Provision for excess and obsolete inventory                            (191)                (143)
       Allowance for sales returns and stock rotation                          (93)                  33
       Loss on disposal of fixed assets                                          -                    1
       Changes in assets and liabilities:
        Accounts receivable                                                    122                 (397)
        Inventories                                                            304                  103
        Deferred taxes                                                           -                   98
        Prepaid expenses and other current assets                              (51)                (109)
        Accounts payable                                                      (302)                 (28)
        Accrued liabilities                                                    357                 (148)
        Deferred revenue                                                         3                   67
                                                                     -----------------   ------------------
          Net cash provided by (used in) operating activities                  328                 (357)
                                                                     -----------------   ------------------

  Cash flows from investing activities:
     Acquisition of equipment                                                  (52)                  (6)
                                                                     -----------------   ------------------
             Net cash used in investing activities                             (52)                  (6)
                                                                     -----------------   ------------------

  Cash flows from financing activities:
     Repayment of long-term debt                                                (4)                  (6)
     Proceeds from exercise of options                                          43                  123
                                                                     -----------------   ------------------
          Net cash provided by financing activities                             39                  117


  Net increase (decrease) in cash and cash equivalents                         315                 (246)

  Cash and cash equivalents at beginning of period                           5,599                4,614
                                                                     -----------------   ------------------
  Cash and cash equivalents at end of period                               $ 5,914              $ 4,368
                                                                     =================   ==================


     See accompanying notes to condensed consolidated financial statements.



                                       5



                                    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, 2004.
     The condensed consolidated balance sheet data as of December 31, 2004 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 three months of 2005 and
     2004, our two largest distributors, collectively represented approximately
     45% and 49% 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 components on a purchase order basis. We own all
     engineering, sourcing documentation, functional test equipment and tooling
     used in the manufacturing of our products and believe that we could shift

                                       6


     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 guarantee 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. We believe that most of these
     end-of-life components will be utilized in the following two years,
     resulting in insignificant amounts of excessive inventory, or none at all.
     We believe that Castelle's liquidity continues to be strong despite these
     purchases, as our cash reserves have increased during the periods when the
     parts were purchased.

     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," AICPA Statement of Position No. 97-2 ("SOP
     97-2") "Software Revenue Recognition," as amended by SOP 98-9,
     "Modification of SOP 97-2, Software Revenue Recognition, with Respect to
     Certain Transactions," and Statement of Financial Accounting Standards
     ("SFAS") No. 48 "Revenue Recognition When Right of Return Exits."

     The Company uses the residual method to recognize revenue when an agreement
     includes one or more elements to be delivered at a future date. If there is
     an undelivered element under the arrangement, the Company defers revenue
     based on vendor-specific objective evidence of the fair value of the
     undelivered element, as determined by the price charged when the element is
     sold separately. If vendor-specific objective evidence of fair value does
     not exist for all undelivered elements, the Company defers all revenue
     until sufficient evidence exists or all elements have been delivered.

     Product revenue is recognized when all of the following criteria are met:
     persuasive evidence of an arrangement exists; delivery has occurred; the
     fee is fixed and determinable; collection is probable; and returns can be
     reasonably estimated. If an acceptance period or other contingency exists,
     revenue is recognized upon satisfaction of the contingency, customer
     acceptance or expiration of the acceptance period. Shipment generally
     occurs and title and risk of loss is transferred when the product is
     delivered to a common carrier.

     We evaluate product sales through our distribution channels and the related
     reserve requirement to establish an estimate for our sales returns reserve
     by reviewing detailed point-of-sales and on-hand inventory reports provided
     to us by our channel partners. Based on a combination of historical return
     experience, the sales activities to end-user customers by our channel
     partners and the level of inventories on hand at the channel partners, we
     determine our returns reserve at the end of each financial period, and
     increases or reduce the reserve balance accordingly.

     We provide standard support to our customers for an initial period of sixty
     days, which includes advance swap of the defective hardware and software,
     bug fixes, software upgrades and technical support. In addition to standard
     support, we also offer our customers the option to purchase extended
     support at the time of product purchase or anytime thereafter. Extended
     support covers hardware and software for a period of one year. We have
     established vendor-specific objective evidence with respect to the fair
     value of the standard support contracts based on standalone sales and
     renewals of our one-year extended support contracts. The fair value of our

                                       7


     sixty day support contracts included with product sales is determined by
     pro-rating the related one-year extended support contracts. We recognize
     revenue from extended support contracts ratably over the period of the
     contract based on contract service dates.

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
     first quarters of 2005 and 2004 (Unaudited, in thousands, except per share
     amounts):



                                                                               Three Months Ended
                                                                        March 31, 2005      March 31, 2004
                                                                  ----------------------------------------
                                                                                            
       Basic:

          Weighted average common shares outstanding                           3,820              3,499
                                                                  ========================================
          Net income                                                          $  135            $   129
                                                                  ========================================
          Net income per common share - basic                                 $ 0.04            $  0.04
                                                                  ========================================

       Diluted:
          Weighted average common shares outstanding                           3,820              3,499
          Common equivalent shares from stock options                            645                951
                                                                  ----------------------------------------
          Shares used in per share calculation - diluted                       4,465              4,450
                                                                  ========================================
          Net income                                                          $ 135              $  129
                                                                  ========================================
          Net income per common share - diluted                               $ 0.03             $ 0.03
                                                                  ========================================


     The calculation of diluted shares outstanding for the three months ended
     March 31, 2005 excludes 123,000 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
     months ended March 31, 2004 excludes 10,000 shares of common stock issuable
     upon exercise of outstanding stock options as their effect was antidilutive
     in the period.

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.

                                       8


     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
                                                                    March 31, 2005      March 31, 2004

                                                                                              
        Net income - as reported                                            $   135            $    129
        Fair value of stock-based compensation                                  (75)                (96)
                                                                   ------------------ -------------------
        Net income - pro forma                                              $    60            $     33
                                                                   ================== ===================

        Net income per share - basic - as reported                          $  0.04            $   0.04
        Net income per share - diluted - as reported                        $  0.03            $   0.03
        Net income per share - basic - pro forma                            $  0.02            $   0.01
        Net income per share - diluted - pro forma                          $  0.01            $   0.01


     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. Inventory details are as
     follows (unaudited, in thousands):


                                              March 31, 2005        December 31, 2004
                                          ----------------------- -----------------------
                                                                          
  Raw material                                $       1,108                $  1,202
  Work in process                                       122                     118
  Finished goods                                        442                     465
                                        ------------------------- ----------------------
            Total inventory                   $       1,672                $  1,785
                                        ========================= ======================


     After the announcement by our component suppliers that new components are
     available to replace certain of their end-of-life components currently used
     in our FaxPress products, we purchased approximately two years worth of
     these end-of-life components in an effort to guarantee a smooth supply of
     our FaxPress Products to our customers. As of March 31, 2005, we have
     approximately $634,000 worth of end-of-life components as compared to
     $675,000 at the end of December 31, 2004. We believe that most of these
     end-of-life components will be utilized in the following two years,
     resulting in insignificant amounts of excessive inventory, or none at all.

     Inventories are reduced for excess and obsolete inventories. These
     write-downs are based on management's review of inventories on hand on a
     quarterly basis, compared to management's assumptions about future demand,
     market conditions and anticipated timing of the release of product upgrades
     or next generation products. If actual market conditions for future demand
     are less favorable than those projected by us or if product upgrades or
     next generation products are released earlier than anticipated, additional
     inventory write-downs may be required. Obsolete products removed from gross
     inventory are physically scrapped.

                                       9


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):


                                                        Three Months Ended
                                            -------------------------------------------
                                                  March 31, 2005        March 31, 2004
                                            -------------------------------------------

                                                                          
  United States                                       $  2,089             $  2,150
  Europe                                                   149                  128
  Pacific Rim                                              286                  198
  Rest of Americas, excluding United States                 70                   63
                                            -------------------------------------------
       Total Revenue                                  $  2,594             $  2,539
                                            ===========================================


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



                                                   March 31, 2005                    March 31, 2004
                   Customer                  Amount           Percentage         Amount         Percentage
       --------------------------------- ----------------  ----------------- ---------------- ---------------
                                                                                           
                      A                          $  455          17%                 $  877            35%
                      B                          $  702          27%                 $  375            15%
                      C                          $  264          10%                  *               *

 * This customer accounted for less than 10% in 2004.

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 March
     31, 2005 (unaudited, in thousands):

                                       10






                                                                           Capital Lease            Total
                                                       Operating Leases      Obligations      Commitments
                                                       ----------------------------------------------------
                                                                                             
           Nine months ending December 31, 2005                  $  156       $       15           $  171
           Year ending December 31, 2006                            207               10              217
           Year ending December 31, 2007                            207                -              207
           Year ending December 31, 2008                            207                -              207
           Year ending December 31, 2009                             86                -               86
                                                       ----------------------------------------------------
                          Total Commitments                      $  863       $       25           $  888
                                                       ====================================================


     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 March 31,
     2005, we had $25,000 outstanding under a loan and security agreement, which
     is subject to an interest rate of 12.8%.

     In September, 2004, we entered into a $4.0 million collateralized revolving
     line of credit with a bank, which is to expire in August 2005. The
     revolving line of credit provides for borrowings of up to $4.0 million.
     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 March 31, 2005, 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 is as
     follows (unaudited, in thousands):




                                                                        March 31, 2005    March 31,
                                                                                            2004
                                                                                            
              Warranty accrual at beginning of quarter                          $   13         $   24
              Accruals for warranties issued during the quarter                      5              -
              Settlements made in kind during the quarter                            -             (1)
                                                                        -------------------------------
              Warranty accrual at end of quarter                                $   18         $   23
                                                                        ===============================


     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

                                       11


     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 insignificant.


     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.   Recent Accounting Pronouncements:

     In December 2004, the FASB issued SFAS No. 123R, "Share-Based Payment," a
     revision of SFAS No. 123, "Accounting for Stock-Based Compensation" and
     superseding APB Opinion No. 25, "Accounting for Stock Issued to Employees."
     SFAS No. 123R requires the Company to expense grants made under the
     Company's stock option program. That cost will be recognized over the
     vesting period of the plans. SFAS No. 123R is effective for fiscal years
     beginning after June 15, 2005. The Company is evaluating the alternatives
     allowed under the standard, which the Company is required to adopt
     effective for its first quarter of fiscal 2006.

     In December 2004, the FASB issued Staff Position SFAS No. 109-1,
     Application of FASB Statement No. 109, Accounting for Income Taxes (FSP No.
     109-1) to the Tax Deduction on Qualified Production Activities Provided by
     the American Jobs Creation Act of 2004 which was signed into law by the
     President of the United States on October 22, 2004. Companies that qualify
     for the recent tax law's deduction for domestic production activities must
     account for it as a special deduction under SFAS No. 109 and reduce their
     tax expense in the period or periods the amounts are deductible, according
     to FSP No. 109-1, effective for the Company in its fiscal year 2005. The
     FASB's guidance is not expected to have a material impact to the Company's
     financial results.


                                       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, 2004.





                                       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, 2004.

Critical Accounting Policies

Castelle's financial statements and accompanying notes are prepared in
accordance with accounting principles generally accepted 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
2004 Annual Report on Form 10-K.

Consolidated Statements of Operations - As a Percentage of Net Sales



                                                     THREE MONTHS ENDED
                                           ......................................
                                             March 31, 2005      March 31, 2004
                                           ------------------  ------------------
                                                                   
Sales:
   Products                                           73%                 79%
   Services                                           27%                 21%
                                           ------------------  ------------------
    Net sales                                        100%                100%

 Cost of sales:
   Products                                           21%                 25%
   Services                                           10%                  8%
                                           ------------------  ------------------
    Cost of sales                                     31%                 33%

                                           ------------------  ------------------
        Gross profit                                  69%                 67%
                                           ------------------  ------------------

 Operating expenses:
     Research and development                         17%                 16%
     Sales and marketing                              23%                 23%
     General and administrative                       25%                 18%
                                           ------------------  ------------------
        Total operating expense                       65%                 58%
 Income from operations                                4%                  9%
     Interest income, net                              1%                  *
     Other income/(expense), net                       -%                  *
                                           ------------------  ------------------
 Income before provision for income taxes              5%                  9%
     Provision for income taxes                        -%                  4%
                                           ------------------  ------------------
 Net income                                            5%                  5%
                                           ==================  ==================


        *  Less than 1%

                                       14


Results of Operations

     Net Sales



                                      Three months ended
                                   (unaudited, in thousands)
                         ..........................................
                            March 31, 2005         March 31, 2004
                         --------------------   -------------------
                                                      
  Sales:
  Products                        $ 1,893               $ 2,012
  Services                            701                   527
                         --------------------   -------------------
        Total net sales           $ 2,594               $ 2,539
                         ====================   ===================


              Net sales were $2.6 million for the first quarter of 2005, as
     compared to $2.5 million for the first quarter of 2004. Products sales of
     $1.9 million in the first quarter of 2005 were lower than product sales in
     the same period in 2004 by $119,000 mainly due to lower sales of our
     FaxPress fax server products to our domestic partners and the divestiture
     of our legacy products. This was offset by higher sales of services of
     $701,000, an increase of $174,000 from the first quarter of 2004 primarily
     due to an increase in our installed customer base.



                                                           Three Months Ended
                                               -------------------------------------------
                                                  March 31, 2005        March 31, 2004
                                               -------------------------------------------
                                                                         
  Sales:
  United States                                     $    2,089            $   2,150
  Europe                                                   149                  128
  Pacific Rim                                              286                  198
  Rest of Americas, excluding United States                 70                   63
                                            -------------------------------------------
        Total sales                                 $    2,594            $   2,539
                                            ===========================================


              United States sales in the first quarter of 2005 were $2.1
     million, as compared to $2.2 million for the same period in 2004,
     representing 81% and 85%, respectively, of total net sales. The decrease in
     sales is mostly attributable to lower sales of our FaxPress products,
     offset partially by higher service revenues.

              International sales (excluding sales to the rest of the Americas)
     were $435,000, or 17% of total net sales, and $326,000, or 13% of total net
     sales, for the first quarter of 2005 and 2004, respectively. The increase
     in sales is mostly due to higher sales of our FaxPress Premier products.

              Sales to the rest of the Americas in the first quarter of 2005,
     excluding the United States, were $70,000 which is comparable to $63,000 in
     the year-ago quarter, representing 3% and 2% of total net sales,
     respectively.


                                       15






     Cost of Sales; Gross Profit



                                    Three months ended
                                 (unaudited, in thousands)
                            ......................................
                              March 31, 2005      March 31, 2004
                            -----------------   ------------------
                                                    
 Cost of sales:
    Products                      $   542              $   639
    Services                          270                  198
                            -----------------   ------------------
        Total cost of sales           812                  837

     Gross profit                 $ 1,782              $ 1,702
     Gross profit %                   69%                  67%


              Gross profit was $1.8 million and $1.7 million for the first
     quarters of 2005 and 2004, representing 69% and 67% of net sales,
     respectively. Gross profit for products was $1.4 million for both the first
     quarters of 2005 and 2004, and represented 71% and 68% of net sales,
     respectively. The higher gross margin percentage in the first quarter of
     2005 was mostly attributable to favorable mix from the sales of our fax
     server products with higher gross profit contribution. Gross profit from
     sale of services was $431,000 and $329,000 for the first quarters of 2005
     and 2004, and representing 61% and 62%, respectively. The higher gross
     profit was due to higher sales.

     Research & Development

              Research and product development expenses were $439,000, or 17% of
     net sales for the first quarter of 2005, as compared to $414,000, or 16% of
     net sales for the same period in 2004. The increase of $25,000 is due to
     the use of consultants to enhance the current product features. The use of
     consultants is expected to continue until the short-term projects are
     completed.

     Sales & Marketing

              Sales and marketing expenses were $598,000, or 23% of net sales
     for the first quarter of 2005, and is comparable to $595,000, or 24% of net
     sales in 2004.

     General & Administrative

              General and administrative expenses were $635,000 in the first
     quarter of 2005, as compared to $465,000 in the first quarter of 2004.
     General and administrative expenses represented 25% and 18% of net sales
     for the respective periods. The increase of $170,000 is primarily due to
     increases in accounting and legal fees related to the restatement of the
     Company's historical financial statements included in the Company's
     December 31, 2004 Annual Report on Form 10-K and Castelle's response to a
     series of comment letters issued by the Division of Corporate Finance of
     the Securities and Exchange Commission during the first quarter of fiscal
     2005. These restatements are discussed in detail in the Company's December
     31, 2004 Form 10K. Castelle completed the restatement of its historical
     financial statements in April 2005, and incurred additional accounting and
     legal expenses, which will be included in second quarter results. General
     and administrative expenses are also expected to increase in fiscal 2005 as
     the Company begins to prepare for Sarbanes-Oxley internal control
     compliance.

                                       16

     Provision for Income Tax

              We account for income taxes in accordance with the liability
     method. Under the liability method, deferred assets and liabilities are
     recognized based upon anticipated future tax consequences attributable to
     differences between financial statement carrying amounts of assets and
     liabilities and their respective tax bases. The provision for income taxes
     is comprised of the current tax liability and the change in deferred tax
     assets and liabilities. We establish a valuation allowance to the extent
     that all or some portion of the deferred tax assets will not be recoverable
     against future taxable income.

              Significant management judgment is required in determining the
     provision for income taxes, and in particular, any valuation allowance
     recorded against our deferred tax assets. During 2004 and 2003, we recorded
     tax benefits of $1,067,000 and $537,000, respectively. This portion of the
     valuation allowance was reversed because we determined that it was more
     likely than not that certain future tax benefits will be realized as a
     result of projected future income. Due to our limited history of generating
     taxable income, we recorded a tax provision at an effective rate of
     approximately 40% during the first three quarters of fiscal 2004. Based in
     large part on our projected future taxable income we did not record income
     tax provision in the first quarter of 2005. We will record a tax provision
     in future periods when all available non-operating losses and tax credit
     carryforwards are fully utilized or the remaining deferred tax assets are
     deemed to be unrealizable.

              At December 31, 2004, we had net operating loss carryforwards of
     approximately $12,955,000 and $2,296,000 available to offset future federal
     and California taxable income, respectively. These loss carryforwards will
     expire in varying amounts beginning in 2005 through 2021. In addition, at
     December 31, 2004, we had federal and California Research and Development
     credit and alternative minimum tax credit carryforwards of approximately
     $1,152,000 and $728,000, respectively. The federal Research and Development
     credits expire in varying amounts beginning in 2007. The California
     Research and Development credits carry-forward indefinitely.


Liquidity and Capital Resources


                                                March 31, 2005     December 31, 2004
                                                 (unaudited)
                                                      (dollars in thousands)
                                                                        
Cash and cash equivalents                           $  5,914            $   5,599
Working capital                                     $  5,922            $   5,750
Working capital ratio                                    3.0                  3.0



         Since our initial public offering of common stock in December 1995, our
principal source of funding has been cash from our operations, with some funding
from capital equipment lease lines. As of March 31, 2005, we had $5.9 million of
cash and cash equivalents, an increase of $315,000 from December 31, 2004. The
increase in cash and cash equivalents was primarily attributable to cash
provided by operating activities of $328,000 and $43,000 in proceeds from the
exercise of employee stock options, off-set by the purchase of $52,000 of
equipment.

         Our operating activities generated cash of $328,000 in the first
quarter of 2005 primarily due to our net income and reduction of inventories as
our usage of some of the end-of-life parts and other components purchased last
year more than offset purchases during the first quarter. Cash used in operating
activities in the first quarter of 2004 was mostly attributable to the increase
in accounts receivable of $379,000 due to slower collections from customers. Net
cash provided by financing activities was $39,000 and $117,000 in the first
quarters of 2005 and 2004, respectively, primarily from proceeds from issuance
of common stock.

                                       17


         In the fourth quarter of 2002, our Board of Directors authorized us,
from time to time, to repurchase at market prices, up to $2.25 million of our
common stock for cash in open market, negotiated or block transactions. The
timing of such 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. As of
March 31, 2005, we had repurchased from open market and negotiated transactions
a total of 1.67 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.
However, we may continue to execute our buyback program as we deem necessary.

         In September, 2004, we entered into a $4.0 million collateralized
revolving line of credit with a bank, which is to expire in August 2005. The
revolving line of credit provides for borrowings of up to $4.0 million.
 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 March
31, 2005, we have not drawn down on the line of credit and were in compliance
with the terms of the agreement.

         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 March 31, 2005,
we had $25,000 outstanding under a loan and security agreement, which is subject
to an interest rate of 12.8%.

         We lease our headquarters in Morgan Hill, California. 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. As of March 31, 2005, future minimum
payments under the lease were $863,000.

         The following represents combined aggregate maturities for all our
financing and commitments as of March 31, 2005 (unaudited, in thousands):



                                                                Payments Due by Period
                                          --------------------------------------------------------------------
   Contractual Obligations                 Total       1 Year      2 - 3 Years   4 - 5 Years    More than 5
                                                                                                   Years
                                          --------- ------------- -------------- ------------- ---------------
                                                                                          
   Capital (Finance) Lease Obligations       $  25         $  15          $  10             -               -
   Operating Lease Obligations               $ 863         $ 156          $ 414         $ 207           $  86
                                          --------- ------------- -------------- ------------- ---------------
   Total contractual cash obligations        $ 888         $ 171          $ 424         $ 207           $  86
                                          ========= ============= ============== ============= ===============



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

                                       18



Recent Accounting Pronouncements:

         In December 2004, the FASB issued SFAS No. 123R, "Share-Based Payment,"
a revision of SFAS No. 123, "Accounting for Stock-Based Compensation" and
superseding APB Opinion No. 25, "Accounting for Stock Issued to Employees." SFAS
No. 123R requires the Company to expense grants made under the Company's stock
option program. That cost will be recognized over the vesting period of the
plans. SFAS No. 123R is effective for fiscal years beginning after December 15,
2005. The Company is evaluating the alternatives allowed under the standard,
which the Company is required to adopt effective in fiscal 2006.

         In December 2004, the FASB issued Staff Position SFAS No. 109-1,
Application of FASB Statement No. 109, Accounting for Income Taxes (FSP No.
109-1) to the Tax Deduction on Qualified Production Activities Provided by the
American Jobs Creation Act of 2004 which was signed into law by the President of
the United States on October 22, 2004. Companies that qualify for the recent tax
law's deduction for domestic production activities must account for it as a
special deduction under SFAS No. 109 and reduce their tax expense in the period
or periods the amounts are deductible, according to FSP No. 109-1, effective for
the Company in its fiscal year 2005. The FASB's guidance is not expected to have
a material impact to the Company's financial results.

                                  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, 2004. 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;

                                       19


 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.

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

         We have experienced significant operating losses and, as of March 31,
2005, had an accumulated deficit of $20.3 million. Our development and marketing
of current and new products will continue to require substantial expenditures.
We incurred $564,000 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. There can be no assurance that
growth in net sales will be achieved or profitability sustained in future years.

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

         In December 2004, the Financial Accounting Standards Board (FASB)
issued Statement No. 123 (revised 2004), "Share-Based Payment" (SFAS 123R). SFAS
123R addresses the accounting for transactions in which an enterprise receives
employee services in exchange for (i) equity instruments of the enterprise or
(ii) liabilities that are based on the fair value of the enterprises' equity
instruments or that may be settled by the issuance of such equity instruments.
SFAS 123R supersede APR No. 25 and will require that such transactions be
accounted for using a fair-value based method and that companies recognize an
expense for compensation cost related to share-based payment arrangements,
including stock option and employee stock purchase plans. SFAS 123R is effective
for the first annual period after June 15, 2005 and, therefore, we will be
implementing SFAS 123R on January 1, 2006.

         As permitted by Statement 123R, we currently account for share-based
payments to employees using APB 25's intrinsic value method and, as such,
generally recognize no compensation cost for employee stock options.
Accordingly, the adoption of SFAS 123R fair value method will have an impact on
our result of operations, although it will not have an impact on our overall
financial or cash position. The impact of SFAS 123R on our operation results
cannot be predicted at this time, because that will depend on levels of
share-based payments granted in the future. Should we adopt the proposed
statement, it may 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 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.

                                       20


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 100% of total
sales in 2004 and almost all sales in the first quarter of 2005. 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:

   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

                                       21


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.

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;

                                       22


   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 18%, 19% and 21% of our net sales for the years ended December 31,
2004, 2003 and 2002, respectively. We sell our products in approximately 44
foreign countries through approximately 89 distributors. Our principal Japanese
distributor accounted for approximately 39%, 38% and 27% of our international
sales in 2004, 2003 and 2002, respectively, and 7%, 7% and 6% of our total net
sales in 2004, 2003 and 2002, respectively. We expect that international sales
will continue to represent a significant portion of 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.

                                       23

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
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.

                                       24


         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.

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.

                                       25


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.

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.

                                       26


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 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 April 30, 2005, our officers and directors and their affiliates
beneficially owned approximately 24% 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
March 31, 2005. 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.

         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.

                                       27


         In a report on Form 8-K filed on March 31, 2005, we indicated that we
had completed a review of our accounting practices with respect to the
historical classification of cost of service revenues and procedures for
recognizing revenue associated with extended support contracts and determined
that our disclosure controls and procedure as of and for the year ended December
31, 2004 were not effective to ensure that information we are required to
disclose in reports that we file or submit under the Securities Exchange Act of
1934 is recorded, processed, summarized and reported within the time periods
specified in Securities and Exchange Commission rules and forms.

         Effective January 1, 2005, we have established a cost center to
separately capture the cost of service revenues as a component of cost of sales.
During the first quarter of fiscal 2005, we have also enhanced our internal
accounting system to ensure that revenue relating to extended support contracts
is recognized over the actual contract term. Our Chief Executive Officer and
Chief Financial Officer believe that our disclosure controls and procedures were
effective as of March 31, 2005.

         In designing and evaluating our disclosure controls and procedures, our
management recognized that any controls and procedures, no matter how well
designed and operated, can provide only reasonable assurance of achieving their
objectives, and our management necessarily applied its judgment in evaluating
the cost-benefit relationship of possible controls and procedures.





                                       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
                  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.

                  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
            (b)   Reports on Form 8-K
                  Castelle filed a Form 8-K on March 31, 2005. Furnished under
                  Item 4.02, "Non-Reliance on Previously Issued Financial
                  Statements or a Related Audit Report or Completed Interim
                  Review", Castelle filed an intention to restate the years
                  ended December 31, 2003 and 2002.






                                       29






                                   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: May 13, 2005
      Scott C. McDonald
      Chief Executive Officer and President
      (Principal Executive Officer)

By:   /s/ Paul Cheng                                          Date: May 13, 2005
      Paul Cheng
      Vice President of Finance and Administration
      Chief Financial Officer
      (Principal Financial Officer and Principal Accounting Officer)



                                       30