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                       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 March 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


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                                 RADVISION LTD.





6-K Items

1.   RADVision Ltd. Press Release dated March 26, 2001 re Zi Corporation  Adopts
     RADVISION V2OIP(TM) Technology for IP Phone Solution.







                                                                          ITEM 1



Contact:

David Seligman            Sandra Fathi
CFO                       Dir. Corp. Communications
RADVISION                 RADVISION
Tel: +972.3.645.5446      Tel: 201.529.4300 x 301
cfo@radvision.com         sfathi@radvision.com


Jody Burfening/Sanjay Hurry              David Hunt
Investor Relations                       Vice President, Finance
Lippert/Heilshorn & Associates, Inc.     Zi Corporation
Tel: 212.838.3777                        Tel: 403 231 4580
jbs@lhai.com                             investor@zicorp.com



            Zi Corporation Adopts RADVISION V2OIP(TM) Technology for
                                IP Phone Solution

   RADVISION'S H.323 ENABLING TECHNOLOGY USED TO DEVELOP INTELLIGENT INTERFACE
                     FOR ZI CORPORATION'S IP PHONE SOLUTION


Mahwah, New Jersey, and Calgary, AB, March 26, 2001 -- RADVISION (NASDAQ: RVSN),
the leading provider of award-winning, industry-standard products and technology
for  real-time  voice  and  video  over  IP  (V2oIPTM),  and Zi  Corporation,  a
technology  company focused on developing and delivering  intelligent  interface
solutions and services to the wireless and consumer electronics  sectors,  today
announced  the  adoption  of  RADVISION's  H.323  enabling   technology  for  Zi
Corporation's IP phone solution.

"As a leader  in the  development  of Voice  over IP  solutions  for the  global
market, Zi Corporation is pleased to adopt RADVISION's H.323 enabling technology
for our IP phone  solutions," said Thomson Lee, Zi Services general manager,  Zi
Corporation.  "With the help of RADVISION's  technology,  we are able to quickly
bring to market a robust solution that meets industry standards."

Zi Corporation
will use RADVISION's  H.323 Toolkit to develop an intelligent user interface for
their IP phone solution.  Zi Corporation's IP phone supports  standard  features
such as call forward,  call  transfer,  call hold,  call waiting and  conference
calling.  Additional attributes include LCD display,  programmable function keys
with  LEDs,  Microsoft(R)  NetMeeting  interoperability,   and  network  enabled
upgrades.

"RADVISION's protocol toolkits were developed to help companies bring
innovative  and  effective  new  products  and  services  to  market in a timely
manner,"  said Dr.  Michelle  Blank,  vice  president of galactic  marketing for
RADVISION.  "Zi  Corporation's IP phone is an excellent  example of the kinds of
IP-centric  products that  RADVISION's  enabling  technology  has helped to make
possible."

About H.323 Toolkit

RADVISION's  H.323 core  protocol  enables the creation of  real-time  voice and
video calls over IP networks.  The H.323 Protocol Toolkit consists of H.225 RAS,
RTP/RTCP and Q.931 Call Signaling.  RADVISION also offers  optional  modules for
H.235 Security features as well as H.450 Supplemental Services for a more robust
solution.  Designed to be platform  independent,  the RADVISION  H.323  protocol
toolkit is  available  for numerous  operating  systems  including  various UNIX
versions,  real-time  OSs for embedded  systems,  as well as Windows,  including
Windows NT and Win CE.

                                    --more--






About Zi Corporation

Zi Corporation (NASDAQ:  ZICA) (TSE: ZIC) is a market-driven  technology company
focused  on  developing  and  delivering  intelligent  interface  solutions  and
services for  wireless and consumer  electronics  sectors.  The  company's  core
technology  product,  eZiText(TM)  connects people to short  messaging,  e-mail,
e-commerce,  Web  browsing  and  similar  applications  in  almost  any  written
language.  The company's  service division provides  market-leading  engineering
design in Bluetooth,  VoIP and man-machine interface.  Zi supports its strategic
partners from offices in Calgary,  Beijing, Hong Kong, San Francisco,  Shenzhen,
Stockholm and Tokyo.  Learn more about Zi  Corporation's  intelligent  interface
solutions at www.zicorp.com

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  (V2oIP),  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 V2oIP 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.


                                       ###

V2oIP,  and OnLAN are  trademarks  and viaIP is a service mark of RADVISION Ltd.
All  other  trade  names  and  trademarks  appearing  herein  are owned by their
respective holders.












                                   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: March 30, 2001