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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 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


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                                 RADVISION LTD.





6-K Items

1.   RADVision  Ltd.  Press  Release  dated  April 25,  2001 re IP blue  Selects
     RADVISION  Software  for  Development  of VT-ALL  Suite of  Next-Generation
     Telephony Products.




                                                                          ITEM 1





      IP blue Selects RADVISION Software for Development of VT-ALL Suite of
                       Next-Generation Telephony Products

IP BLUE'S VT-ALL (VIRTUAL TERMINAL - APPLICATION LINK & LAUNCH) IS DEVELOPED ON
          RADVISION'S MARKET-LEADING IP COMMUNICATIONS PROTOCOL TOOLKIT

New York,  NY & Mahwah,  NJ,  April 25,  2001 -- IP blue,  a leading  technology
integrator and Cisco IP Telephony  Specialization  Partner  (NASDAQ:  CSCO), and
RADVISION    (NASDAQ:    RVSN),   the   leading   provider   of   award-winning,
industry-standard  products and technology for real-time voice and video over IP
(V2oIPTM),  today  announced  that IP  blue is  deploying  its  VT-ALL  (Virtual
Terminal - Application Link & Launch)  multi-line  soft-phone using  RADVISION's
H.323 enabling software.

"IP blue selected RADVISION's  technology for its ease of development,  industry
acceptance and robust functionality in the H.323 environment. RADVISION's family
of IP  communication  protocols  offers  a  necessary  migration  path  for  the
additional flexibility required in the fast-paced, evolving VoIP world. IP blue,
reviewed and compared the current  industry  development  `players' and made its
selection  based on RADVISION's  clearly  defined focus in  maintaining  current
standards, while planning and addressing future industry direction. The decision
to develop with RADVISION was further  simplified  after  reviewing their market
acceptance and broad spectrum and how closely it mirrors the  directional  plans
we have for the future of VT-ALL", said Terence White, President and CEO.

"Today,  hundreds of thousands of end-users  around the world are  communicating
over  next-generation  networks,  using IP-centric  products and solutions built
around RADVISION's IP communication  protocols," said Dr. Michelle Blank, senior
vice president of galactic marketing for RADVISION. "As the market leader in the
development of software toolkits for real-time IP communications, RADVISION will
continue to offer our customers like IP blue innovative  implementations  of all
the key underlying  protocols needed for real-time voice and video communication
over IP, which today include H.323, SIP, MEGACO and MGCP."

                                    --more--






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.

About IP blue

IP blue,  an  application  developer in the VoIP  marketplace,  has targeted the
financial  industry as its first industry  vertical.  The  development of VT-ALL
allows IP blue to reach a new and emerging segment of the Financial Marketplace,
"the 24-hour  trader".  VT-ALL is an "edge"  product that  provides  much of the
features and functions found in broker/trader's  day-to-day working environment.
Features  include  all the basic  telephone  functions  found in today's  modern
digital  telephone  system,  plus the added  features  of the  industry-specific
Dealer  Board  or  Turret.  These  features  include:  voice  recording,  global
intercom,  broadcast and hoot `n holler.  Other  "linked"  applications  include
VT-ALERT, a messaging component for alerting persons or groups of various market
events in real-time,  by multiple delivery methods  (wire-line or wireless),  to
multiple devices (phone - cell, wire-line, PDA, email, fax, etc.). VT-ALL can be
used in conjunction with Cisco's collaborative software applications, as well as
their IP TV and IP Contact Center suite of products.

These  mission-critical  functions  will now be offered to the financial user at
remote locations,  such as branch office-home  office,  hotel or vacation house.
For   more    information,    please    visit   the    company's    website   at
http://www.ipblue.com.

                                       ###

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.

Contact:

   Jack Galligan                            Sandra Fathi
   Corporate Marketing                      Dir. Corporate Communications
   IP blue                                  RADVISION
   Tel: 212.485-1210                        Tel: 201.529.4300 x 301
   jackgalligan@ipblue.com                  sfathi@radvision.com











                                   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 26, 2001