================================================================================


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             ----------------------



                                   F O R M 6-K

                      Pursuant to Section 13a-16 or 15d-16
                     of the Securities Exchange Act of 1934


                           For the month of April 2001



                                 RADVISION LTD.
                              (Name of Registrant)




                 24 Raoul Wallenberg St., Tel Aviv 69719 Israel
                     (Address of Principal Executive Office)


     Indicate  by check mark  whether the  registrant  files or will file annual
reports under cover of Form 20-F or Form 40-F.

                        Form 20-F X        Form 40-F __


     Indicate by check mark whether the registrant by furnishing the information
contained  in this  Form is  also  thereby  furnishing  the  information  to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

                        Yes __             No  X


================================================================================











                                 RADVISION LTD.





6-K Items

1.   RADVision  Ltd.  Press Release  dated April 18, 2001 re RADVISION  Appoints
     Telecommunications  Industry  Veteran as Chief Executive  Officer and Board
     Director.

2.   RADVision  Ltd.  Press Release dated April 18, 2001 re RADVISION  Announces
     First Quarter 2001 Results.




                                                                          ITEM 1







  Corporate Contacts:                            Investor Contacts:
  David Seligman                                 Jody Burfening/Sanjay Hurry
  Chief Financial Officer                        Lippert/Heilshorn & Associates
  RADVISION, Ltd.                                Tel: 212.838.3777
  Tel: 972.3.645.5446                            jbs@lhai.com
  cfo@radvision.com

  Sandra Fathi
  Dir. Corporate Communications
  RADVISION, Inc.
  Tel: 201.529.4300 x301
  Mobile: 201.406.6150
  sfathi@radvision.com




            RADVISION APPOINTS TELECOMMUNICATIONS INDUSTRY VETERAN AS
                   CHIEF EXECUTIVE OFFICER AND BOARD DIRECTOR

   - New U.S.-Based CEO, Gadi Tamari Brings Extensive Operating and Managerial
                            Experience to RADVISION -


     Tel Aviv,  Israel,  April 18, 2001 - RADVISION  Ltd.  (Nasdaq:  RVSN),  the
leading provider of award-winning, industry-standard products and technology for
real-time voice and video communication over IP (V2oIP (TM)), has appointed Gadi
Tamari chief executive  officer and to the board of directors,  effective today.
Tamari  replaces  Ami  Amir who  will  remain  with  RADVISION  on the  board of
directors and as active member of the executive committee.  With the appointment
of Tamari to the board of directors, the number of board seats increases to ten.
Tamari will be based at the Company's U.S.  headquarters  located in Mahwah, New
Jersey.

     Amir,  retiring  chief  executive  officer  of  RADVISION,   said,  "As  an
entrepreneur  who has led  RADVISION  for the past nine  years  from  inception,
through its start-up phase and initial public offering,  I concluded that it was
time to bring in a  professional  manager  with  solid  operational  experience,
proven skills at managing growing  companies







and with an in-depth understanding of the IP communications market. In addition,
Gadi has experience cultivating  relationships with service providers,  which is
an important growth  opportunity for RADVISION.  Gadi offers all these strengths
plus extensive  international  experience with technology  companies,  including
successful Israeli companies both in the Israel and the US. In handing the baton
to Gadi, I have the utmost  confidence  in his ability to lead  RADVISION to the
next stage of the company's growth."

     Tamari  commented,  "RADVISION's  market  leader  reputation  as the  V2oIP
experts had a major  influence on my decision to join the  company.  As a former
customer from my days at Excel  Switching  Corp., I am well  acquainted with the
company. I look forward to working closely with the existing  management team to
execute on  RADVISION's  near term  business  strategy and in helping  guide the
company in broadening its product  offering,  and diversifying and expanding its
distribution channels."

     Tamari joins RADVISION  following a 30-year career in sales and operations,
having spent the past 15 years in senior  management  positions with a number of
telecommunications  companies.  Most recently,  he was with Lucent  Technologies
where he has served as vice president,  international  operations of the OpenNet
Softswitch  organization.  Prior to that,  Tamari was chief operating officer of
Excel Switching  Corporation  responsible for international  sales,  operations,
marketing and customer  support.  Under his  leadership,  revenues grew from $60
million in 1996 to $200 million in 1999.  Tamari was a member of the  management
team  that  took  Excel  Switching   public  and  sold  the  company  to  Lucent
Technologies in 1999 for $1.7 billion.  His experience  working with world class
companies  includes   successful   telecommunications   and  Israeli  technology
companies.  Tamari holds a bachelor's  degree in  mechanical  engineering  and a
master's degree in industrial engineering from the Technion, Israel Institute of
Technology and attended Harvard University's Advanced Management Program.








     RADVISION  also  announced  that Zohar Zisapel  replaces  Yehuda Zisapel as
chairman of the board of directors, effective today. Zohar Zisapel has served as
a director of  RADVISION  since 1992 and was  chairman of the board of directors
until  August  1999.  Yehuda  Zisapel  will  remain  as a member of the board of
directors.


About RADVISION

RADVISION is a leading  provider of products and technology for real-time voice,
video, and data communications over packet networks;  this includes the Internet
and other Internet Protocol (IP) based networks.  Recognized  universally as the
experts in real-time  Voice and Video over IP  (V(2)oIP),  RADVISION  offers the
broadest and most complete set of enabling  technology  and  networking  systems
needed to enable  enterprises  and service  providers to migrate their voice and
video  communications  from  traditional  telephone  networks  to new  converged
networks. Today, hundreds of thousands of end-users around the world communicate
over  next-generation  networks,  using IP-centric  products and solutions built
around RADVISION products and technology.  RADVISION's  multi-protocol  software
toolkits  for  IP  communications   include:   SIP,  MEGACO,  MGCP,  and  H.323;
RADVISION's V(2)oIP networking products include: gateways, conferencing bridges,
and gatekeeper applications. For more information,  please visit our website at:
www.radvision.com.

This press release contains forward-looking statements that are subject to risks
and uncertainties.  Factors that could cause actual results to differ materially
from these  forward-looking  statements include, but are not limited to, general
business conditions in the industry,  changes in demand for products, the timing
and amount or  cancellation of orders and other risks detailed from time to time
in RADVISION's  filings with the Securities and Exchange  Commission,  including
RADVISION's Form F-1 registration statement.

All trademarks recognized

                                       ###





                                                                          ITEM 2




  Corporate Contacts:                           Investor Contacts:
  David Seligman                                Jody Burfening/Sanjay Hurry
  Chief Financial Officer                       Lippert/Heilshorn & Associates
  RADVISION, Ltd.                               Tel: 212.838.3777
  Tel: 972.3.645.5446                           jbs@lhai.com
  cfo@radvision.com

  Sandra Fathi
  Dir. Corporate Communications
  RADVISION, Inc.
  Tel: 201.529.4300 x301
  Mobile: 201.406.6150
  sfathi@radvision.com



                 RADVISION ANNOUNCES FIRST QUARTER 2001 RESULTS

                  - EPS of $0.09 on Revenues of $14.9 Million -

     Tel Aviv,  Israel,  April 18, 2001 -- RADVISION Ltd.  (NASDAQ:  RVSN),  the
leading provider of award-winning, industry-standard products and technology for
real-time voice and video  communication  over IP  (V2oIP(TM)),  today announced
results for the first quarter ended March 31, 2001.

     Revenues for the first quarter  reached $14.9  million,  compared with $7.8
million  for the same period in 2000,  representing  a 90%  increase.  Operating
income for the quarter was  $404,000,  compared  with a loss of $636,000 for the
same period last year. Net income for the quarter was $1.8 million, or $0.09 per
diluted share,  compared with a net loss of $521,000, or $0.04 cents per diluted
share, for the first quarter of 2000.

     "Our  performance  this  quarter  reflects  a slow down in U.S.  enterprise
spending  for our  networking  products,  offset by  continued  growth  from our
enabling technologies business," said Ami Amir, retiring chief executive officer
of  RADVISION.  "Our  non-U.S.-based  networking  business  remains  strong,  as
enterprises and service  providers  continue to deploy  enhanced  communications
services  such as voice  and video  conferencing  to meet the  demands  of their
customers  and increase the  productivity  of their  organizations.  We are also
seeing ongoing demand for our enabling  technologies,  and at the same time, are
starting to see the benefits of our strategy to leverage our H.323 customer base
for








additional sales of other protocols. This quarter, for instance, a number of
our H.323 customers also purchased SIP."

     Continued Mr. Amir,  "Over the past several  weeks,  we have taken steps to
bring the Company's  cost  structure in line with expected  revenues by reducing
overall  expenses and  implementing a 10% workforce  reduction on April 2nd. Our
goal is to maintain positive earnings for fiscal 2001.

     "Going  forward,   we  are  concentrating  our  resources  on  sales-driven
activities  such as expanding our  distribution  presence  outside of the United
States and introducing new products that expand our addressable market.

     "We continue to see  opportunities  for increased  sales of our  networking
products in Europe and Asia  Pacific and are  positioning  ourselves  to further
penetrate these relatively  untapped markets. We recently opened a new office in
London,  as a base for  establishing  new partnerships  throughout  Europe,  and
expanded  our  office  in  Beijing  to sell  our  networking  products  into the
fast-growing  Chinese market. We are also establishing closer relationships with
existing  partners  and  seeking  new  partners  as  we  further  diversify  our
networking  products  customer  base. At the same time,  we will also  introduce
enhancements to our existing product offering and new IP-centric products,  such
as voice-bridging, to remain ahead of our competitors."

     Continued  Mr.  Amir,  "We intend to maintain  our  leadership  position in
enabling   technologies   through   continuous   technology   introductions  and
improvements for all key IP communication  protocols.  During the second quarter
we will introduce next generation  H.323  technology for robust,  carrier-class,
high availability VoIP solutions."

     The Company  reiterated its financial guidance for the second quarter to be
in the range of $11.5 to $12.5 million,  with a fully diluted earnings per share
of $0.01 to $0.02.

     "The steps we have taken this  quarter give us  confidence  that we will be
able to sustain our market  leadership  during this economic  downturn and build
for the future,"  concluded  Mr. Amir.  "With cash and cash  equivalents  of $94
million and no debt,  we have the  financial  strength to execute on new product
and market development,  while at the same time, solidifying our position as the
recognized experts in V2oIP."








About RADVISION

RADVISION is a leading  provider of products and technology for real-time voice,
video, and data communications over packet networks;  this includes the Internet
and other Internet Protocol (IP) based networks.  Recognized  universally as the
experts in real-time  Voice and Video over IP  (V(2)oIP),  RADVISION  offers the
broadest and most complete set of enabling  technology  and  networking  systems
needed to enable  enterprises  and service  providers to migrate their voice and
video  communications  from  traditional  telephone  networks  to new  converged
networks. Today, hundreds of thousands of end-users around the world communicate
over  next-generation  networks,  using IP-centric  products and solutions built
around RADVISION products and technology.  RADVISION's  multi-protocol  software
toolkits  for  IP  communications   include:   SIP,  MEGACO,  MGCP,  and  H.323;
RADVISION's V(2)oIP networking products include: gateways, conferencing bridges,
and gatekeeper applications. For more information,  please visit our website at:
www.radvision.com.

This press release contains forward-looking statements that are subject to risks
and uncertainties.  Factors that could cause actual results to differ materially
from these  forward-looking  statements include, but are not limited to, general
business conditions in the industry,  changes in demand for products, the timing
and amount or  cancellation of orders and other risks detailed from time to time
in RADVISION's  filings with the Securities and Exchange  Commission,  including
RADVISION's Form F-1 registration statement.

All trademarks recognized

                              - tables to follow -






                                 RADVISION LTD.
                        Consolidated Statements of Income
                           (U.S. Dollars in thousands)

                                                         Three Months Ended
                                                             March 31
                                                            (Unaudited)
                                                       2001              2000
                                                       ----              ----

Sales                                                $14,895           $7,827
Cost of Sales                                          3,725            1,944

                                                     -------           ------
Gross Profit                                          11,170            5,883

Research and Development, Net                          4,757            2,294
Marketing and Selling, Net                             4,840            3,610
General and Administration                             1,169              615

                                                     -------           ------
Operating Income (Loss)                                  404             (636)

Financial Income, net                                  1,403              115

Net Income/(Loss)                                     $1,807            ($521)
                                                     -------           ------

Earnings per Share                                     $0.09           ($0.04)
                                                       =====           ======

Weighted Average Number of Shares
Outstanding During the Period - Basic             19,196,316       14,626,504

Diluted Earnings per Share                             $0.09           ($0.04)
                                                       =====           ======

Weighted Average Number of Shares
Outstanding During the Period - Diluted           20,750,146       14,626,504



                                   -- more --






                                 RADVISION LTD.
                           Consolidated Balance Sheet
                           (U.S. Dollars in thousands)

                                             March 31,              December 31,
                                               2001                     2000
                                            (Unaudited)              (Audited)
Assets
Cash and Liquid Investments                   $ 93,711                $ 97,064
Receivables - Trade                              7,294                   7,025
Receivables - Other                              1,128                   1,051
Inventories                                      3,352                   4,956
                                              --------                --------
Current Assets including
Long Term Liquid Investments                   105,485                 110,096

Severance Pay Fund                               1,082                   1,055
                                              --------                --------

Equipment
Cost                                             8,784                   8,353
Less Accumulated Depreciation                    3,500                   3,153
                                              --------                --------
                                                 5,284                   5,200

Total Assets                                   111,851                 116,351
                                              --------                --------

                                              ========                ========


Liabilities and Equity
Short Term Debt                                  $  38                   $  46
Payable - Trade & Related Parties                2,012                   3,716
Other Payables & Accrued Expenses               12,344                  16,777
                                              --------                --------
Current Liabilities                             14,394                  20,539

Accrued Severance Pay                            1,649                   1,448
                                              --------                --------

Bank Loans                                          12                      19
                                              --------                --------

Shareholder's Equity
Share Capital                                      168                     165
Capital Surplus                                103,402                 103,849
Deferred compensation                             (554)                   (641)
Accumulated deficit                             (7,220)                 (9,028)
                                              --------                --------
                                                95,796                  94,345

Total Liabilities                              111,851                 116,351
                                              --------                --------

                                       ###









                                   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.



                                                  RADVISION LTD.
                                                 ----------------
                                                   (Registrant)



                                                   By   /s/David Seligman
                                                        -----------------

                                                       David Seligman
                                                       Chief Financial Officer


Dated: April 18, 2001