SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                             ----------------------

                                   F O R M 6-K

       REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
                   UNDER THE SECURITIES EXCHANGE ACT OF 1934

                           For the month of June 2007

                                 RADVISION LTD.
                              (Name of Registrant)


               24 Raoul Wallenberg Street, 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 if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): [ ]

                  Indicate by check mark if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): [ ]

                  Indicate by check mark whether by furnishing the information
contained in this Form, the registrant 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]

                  If "Yes" is marked, indicate below the file number assigned to
the registrant in connection with Rule 12g3-2(b): 82-___________


This Form 6-K is being incorporated by reference into the Registrant's Form S-8
Registration Statements File Nos. 333-45422, 333-53814, 333-55130, 333-66250,
333-82488, 333-104377, 333-116964, 333-127013 and 333-141654.





                                 RADVision Ltd.

6-K Items


     1.   Press release re RADVISION(R)  Releases Next Generation  SCOPIA(TM) 3G
          Video Gateway dated June 4, 2007.

     2.   Press release re RADVISION(R)  SIP Solutions  Incorporated in Advanced
          Videoconference System by HaiVision dated June 12, 2007.

     3.   Press  release  re  RADVISION(R)  Announces  General  Availability  of
          Revolutionary New Desktop Video  Conferencing  Solution dated June 18,
          2007.

     4.   Press  release  re  RADVISION(R)   Successfully  Tests  IMS  Developer
          Products and Solutions at The IMS Plugfest II  Interoperability  Event
          dated June 21, 2007.

     5.   Press  release  re  RADVISION(R)  3G  Products  Selected  by  Deutsche
          Telefon- und  Marketing-Services  GmbH (DTMS) to Provide  Mobile Video
          Communication Services dated June 25, 2007.

     6.   Press  release  re  Avistar  and  RADVISION  Announce  Patent  License
          Agreement dated June 28, 2007.






                                                                          ITEM 1







Press Release                                                  Source: RADVISION

RADVISION(R) Releases Next Generation SCOPIA(TM) 3G Video Gateway

Monday June 4, 7:00 am ET

Introducing a Unique Multi-Profile Solution for IMS and Converged Video
Communications

TEL AVIV, Israel--(BUSINESS WIRE)--RADVISION (Nasdaq: RVSN - News), a leading
provider of video network infrastructure and developer tools for unified visual
communications over IP, 3G, and emerging next-generation IMS networks, today
announced the release of Version 3.0 of its market-proven SCOPIA 3G Video
Gateway. This IMS-ready version introduces exciting new functionality with
enhanced support for multiple diverse applications over converged networks,
powerful media processing capabilities and new levels of infrastructure
optimization.

The SCOPIA 3G Video Gateway bridges 3G-324M-based mobile devices and IP-based
video terminals & media servers, messaging systems, RTSP streaming servers, IMS
terminals, network cameras and ISDN endpoints for the delivery of advanced video
and voice services.

A pioneer of gateway technology, RADVISION's SCOPIA 3G Video Gateway was
first-to-market in the emerging 3G industry. This established, market-proven
product enjoys widespread success, answering the needs for scalable,
multi-application and redundant carrier-grade performance for operators across
the globe. RADVISION's SCOPIA 3G Video Gateway is integrated and delivered to
operators by world leading telecommunication equipment manufacturers and system
integrators.

"The SCOPIA 3G Video Gateway supports simultaneous video and voice telephony,"
said Amir Fish, RADVISION 3G Gateway Product Manager. "This version adds a
unique method for simultaneous profiling of different application requirements
resulting in optimized end-user quality and infrastructure resource usage, along
with advanced transcoding capabilities based on the latest DSP technology."

The main features of this release include:

     o    Improved   SIP/IMS-support   based  on  RADVISION's  renowned  SIP/IMS
          protocol stack,  enabling  carrier grade SIP Server  high-availability
          and keep-alive mechanisms

     o    "Any-to-any"  transcoding with unique H.264 support for a high quality
          video experience - an industry first implementation

     o    Enhanced rate  matching and size  matching for superior  video quality
          and assured interoperability for deployment of converged services

     o    Industry-first  multiple  application  profiling  with an  easy-to-use
          graphic web interface for flexible optimized service delivery

     o    Enhanced  video error  resiliency  algorithms  that deliver high video
          quality, including QualiVision(TM) Image Refresh


"With the introduction of Version 3.0 of the SCOPIA 3G Video Gateway, we are
addressing the latest demands of major players in the 3G industry as they deploy
large scale live services," said Alon Barnea, General Manager of RADVISION's
Mobility & Service Provider Business Unit. "This release delivers complete "any
device, any application" solutions for IMS and converged communications. Today,
we are witness to the fact that the unique combination of robust carrier-grade
infrastructure like the SCOPIA Interactive Video Platform and 3G Video Gateway
in conjunction with interactive mobile video applications are fueling 3G usage
growth - driving revenues and enhancing subscriber satisfaction and loyalty."








About RADVISION

RADVISION (NASDAQ: RVSN - News) is the industry's leading provider of
market-proven products and technologies for unified visual communications over
IP, 3G and IMS networks. With its complete set of standards-based video
networking infrastructure and developer toolkits for voice, video, data and
wireless communications, RADVISION is driving the unified communications
evolution by combining the power of video, voice, data and wireless - for high
definition video conferencing systems, innovative converged mobile services, and
highly scalable video-enabled desktop platforms on IP, 3G and emerging
next-generation IMS networks. For more information about RADVISION, visit
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 Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Stockholders
and other readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We undertake no obligation to update publicly or revise any
forward-looking statement.

Contact:
RADVISION
Tsipi Kagan, +1-201-689-6340
Chief Financial Officer
cfo@radvision.com
or
Media Relations:
Dukas Public Relations
Kristin Conforti, +1-516-320-6839
kristin@dukaspr.com
or
Investor Relations:
Comm-Partners LLC
June Filingeri, +1-203-972-0186
junefil@optonline.net






                                                                          ITEM 2






Press Release                                                  Source: RADVISION

RADVISION(R) SIP Solutions Incorporated in Advanced Videoconference System
by HaiVision

Tuesday June 12, 7:00 am ET

TEL AVIV, Israel--(BUSINESS WIRE)--RADVISION (Nasdaq: RVSN - News), a leading
provider of video network infrastructure and developer tools for unified visual
communications over IP, 3G, and emerging next-generation IMS networks, today
announced that HaiVision Systems Inc. (Montreal, Canada), a leader in high
performance network video technology, is delivering Session Initiation Protocol
(SIP) interoperability of its hai1000 product based on the RADVISION SIP
Protocol Toolkit. This capability, incorporated into HaiVision's Invitation(TM)
feature for the hai1000 multi-stream codec for telepresence, allows high
performance network video technology to communicate with traditional video
conferencing endpoints.

"With RADVISION's support, HaiVision is introducing the first product that can
seamlessly bridge the gap between high performance telepresence systems and
traditional conferencing endpoints," explained Francois Gariepy, HaiVision's
president. "Now within a multipoint telepresence session executives can invite
external participants to contribute regardless of their conferencing platform."

"We selected RADVISION because of their cross platform expertise," continued
Gariepy. "They have extensive knowledge and experience in both the IP/telecom
and conferencing sectors."

"We are excited about HaiVision's efforts in joining together network video with
videoconferencing," stated Sagi Subocki, Product Manager with RADVISION's
Technology Business unit. "SIP is the advanced standard for interaction between
communications systems at all levels."

Visit RADVISION (Booth 4643) and HaiVision (Booth 4846) in the conferencing
pavilion at InfoComm June 19-21 in Anaheim.

About RADVISION

RADVISION (NASDAQ: RVSN - News) is the industry's leading provider of
market-proven products and technologies for unified visual communications over
IP, 3G and IMS networks. With its complete set of standards-based video
networking infrastructure and developer toolkits for voice, video, data and
wireless communications, RADVISION is driving the unified communications
evolution by combining the power of video, voice, data and wireless - for high
definition video conferencing systems, innovative converged mobile services, and
highly scalable video-enabled desktop platforms on IP, 3G and emerging
next-generation IMS networks. For more information about RADVISION, visit
www.radvision.com.

About HaiVision Systems Inc.

HaiVision Systems Inc. is a private company dedicated to improving the way
people live and work through the use of advanced network video technology.
HaiVision's interactive products are used in the foremost telepresence suites,
boardrooms, and continuous presence distance education systems worldwide. They
are used as well in the medical field supporting information and service
delivery within hospital campuses and across nations. HaiVision's streaming
products are also used extensively for video backhaul and distribution in
broadcast, near broadcast, and IPTV applications. Please have a look at the
product information, case studies, videos, and file samples available in the
file download area of our web site.





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 Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Stockholders
and other readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We undertake no obligation to update publicly or revise any
forward-looking statement.

Contact:
RADVISION
Tsipi Kagan, +1 201-689-6340
Chief Financial Officer
cfo@radvision.com
or
Dukas Public Relations
Media Relations:
Kristin Conforti, +1 516-320-6839
kristin@dukaspr.com
or
Comm-Partners LLC
Investor Relations:
June Filingeri, +1 203-972-0186
junefil@optonline.net
or
HaiVision Systems Inc.
Ceicy Tsui, 514-334-5445, ext. 251
Email: ctsui (at) haivision.com
Web: www.haivision.com







                                                                          ITEM 3





Press Release                                                  Source: RADVISION

RADVISION(R) Announces General Availability of
Revolutionary New Desktop Video Conferencing Solution

Monday June 18, 7:00 am ET

SCOPIA(TM) Desktop Extending Room System Video Conferences to Any Remote User
with a PC and an Internet Connection to be Showcased at InfoComm 07

ANAHEIM, Calif. & TEL AVIV, Israel--(BUSINESS WIRE)--RADVISION
(Nasdaq: RVSN - News), a leading provider of video network infrastructure and
developer tools for unified visual communications over IP, 3G, and emerging
next-generation IMS networks, today announced the general availability of its
SCOPIA Desktop video conferencing solution - an important extension of the
SCOPIA unified communications platform.

SCOPIA Desktop extends room system based video conferencing deployments by
allowing remote users to connect to conferences and fully participate in audio,
video, and data collaboration as if they were in the same room. SCOPIA Desktop
uses a freely distributable Web-based plug-in that can be used by anyone inside
or outside the enterprise firewall. SCOPIA Desktop makes it easy to connect to
and fully participate in meetings no matter where users are - at their desk, at
a customer location, or in a hotel in another part of the world; further
extending one of the SCOPIA platform's missions to easily connect any
communications device anywhere.

Traditional video conferencing users have benefited from the value of voice,
video and data collaboration between conference rooms, but there has been no
simple way to include users at their desktops or remote users on laptops that
did not involve complex software installations, expensive licensing fees or
firewall traversal problems. SCOPIA Desktop eliminates these issues.

SCOPIA Desktop Highlights:

     o    Delivers a high quality  interactive  video  collaboration  experience
          from a PC

     o    Provides face-to-face  communication to conferencing room systems that
          is as easy as Web conferencing

     o    Accessed  through a freely  distributed  browser  plug-in  so  anyone,
          anywhere can participate in a conference

     o    Includes  automatic  and  transparent  firewall  traversal  for  users
          outside the enterprise network

     o    Offers the same  experience for all  participants,  whether  connected
          from a conference room or a PC

     o    Enables  data  collaboration  interoperability  via  H.239  with  room
          systems

     o    Provides  conference  broadcasting  via streaming to large  audiences,
          including both PC and Mac users

     o    Is centrally  managed and deployed  for remote  users  eliminating  IT
          administration headaches

RADVISION will be exhibiting a broad range of advanced video solutions including
SCOPIA Desktop and High Definition (HD) video conferencing capability at
InfoComm 07, June 19-21, Anaheim Convention Center, Anaheim, California, booth
4643 in the Collaborative Conferencing Pavilion.

SCOPIA Desktop has gone through extensive testing with hundreds of live
conferences involving many locations, customers and partners. Meeting
participants have successfully connected with SCOPIA Desktop's Web-based client
from a full range of locations regardless of their firewall configurations. The
initial reaction to the product has been very positive from customers and
partners.

"SCOPIA Desktop has made it possible to extend our room system deployment to
users at their PCs in a way that has not been possible with any other solution
in the market until now," said Oscar Monrio de la Herran, IT Manager of Banco
Espirito Santo S.A., Sucursal en Espana. "RADVISION's solution delivers what is
really needed for desktop conferencing with their Web-based client, transparent
firewall traversal, and interoperable data sharing between room conferencing and
desktops. Now we can allow users to participate in group conferences no matter
where they are and we are seeing significant productivity gains from this
capability."





Boaz Raviv, RADVISION's CEO, said, "We are excited to deliver SCOPIA Desktop to
the market. Our customers have been telling us that they want a simple way to
connect their room conferencing installations to desktop and remote users and we
are delivering that capability today. We are pleased to bundle this capability
into our award winning SCOPIA platform, further enhancing the value of the
SCOPIA family to our customers."

About RADVISION

RADVISION (Nasdaq: RVSN - News) is the industry's leading provider of
market-proven products and technologies for unified visual communications over
IP and 3G networks. With its complete set of standards-based video networking
infrastructure and developer toolkits for voice, video, data and wireless
communications, RADVISION is driving the unified communications evolution by
combining the power of video, voice, data and wireless - for high definition
video conferencing systems, innovative converged mobile services, and highly
scalable video-enabled desktop platforms on IP, 3G and emerging next-generation
IMS networks. For more information about RADVISION, visit 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 Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Stockholders
and other readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We undertake no obligation to update publicly or revise any
forward-looking statement.

The names of actual companies and products mentioned herein may be the
trademarks of their respective owners.

Contact:
RADVISION
Tsipi Kagan, +1 201-689-6340
Chief Financial Officer
cfo@radvision.com
or
Media Relations:
Dukas Public Relations
Kristin Conforti, +1 516-320-6839
kristin@dukaspr.com
or
Investor Relations:
Comm-Partners LLC
June Filingeri, +1 203-972-0186
junefil@optonline.net






                                                                          ITEM 4







Press Release                                                  Source: RADVISION

RADVISION(R) Successfully Tests IMS Developer Products and Solutions at The IMS
Plugfest II Interoperability Event

Thursday June 21, 7:00 am ET

Participation in the IMS Forum PlugFest II is Further Testimony to RADVISION's
Commitment to IMS Interoperability TEL AVIV, Israel--(BUSINESS WIRE)--RADVISION
(Nasdaq: RVSN - News), a leading provider of video network infrastructure and
developer tools for unified visual communications over IP, 3G, and emerging
next-generation IMS networks, today announced that it successfully tested
several IMS products at the IMS Forum's IMS Plugfest(TM) II interoperability
testing (IOT) event held June 4 through 8 at the University of New Hampshire
InterOperability Lab in Durham, NH. RADVISION is an active member of the IMS
Forum, the industry's only forum dedicated to the acceleration of IP Multimedia
Subsystem (IMS) application and service interoperability, in addition to
chairing an IMS Activity Group for IMS client IOT.

"RADVISION's IMS SIP Toolkit, IMS DIAMETER Toolkit, and ProLab(TM) IMS Testing
Suite were an instrumental part of the IMS Forum Plugfest," reported Adi Paz,
Senior Director of Product Management and Marketing for RADVISION's Technology
Business Unit. "RADVISION's IMS Express(TM), the complete IMS Development Suite
includes these products and more, and offers the most comprehensive suite of
IMS-compliant development tools available in the market. RADVISION places
special emphasis on IOT, especially in the area of IMS as it emerges to become
an industry standard. This is why RADVISION considers the IMS Forum's Plugfest
to be one of the most important events in the field of IMS, and is honored to
participate and help vendors achieve new levels of interoperability."

RADVISION's IMS Express, the complete IMS Development Suite includes all the
necessary signaling and media protocols to easily and cost-effectively meet the
IMS challenge.

-- IMS SIP Toolkit                     -- IMS Client Suite
-- IMS MEGACO/H.248 Toolkit            -- ProLab(TM) IMS Test Solution
-- IMS DIAMETER Toolkit                -- IMS SIP Server Platform
-- IMS Advanced-RTP/RTCP Toolkit

IMS Plugfest II is the second in a series of open testing events that are
designed to foster interoperability by establishing an industry-recognized
interoperability certification for IMS services and applications. The Plugfest
testing events are creating industry-recognized interoperability test plans for
IMS applications and services, allowing service providers to expedite IMS
service rollout.

The first Plugfest focused on interoperability of the IMS transport layer.
Building on Plugfest I, the second Plugfest event, or Plugfest II, tests
interoperability for VoIP, IP Centrex, SMS and Fixed-Mobile Convergence
functionality.

"RADVISION has contributed to the planning and execution of our Plugfest
interoperability events," said Michael Khalilian, Chairman and President of the
IMS Forum. "Protocol stacks are an essential part of the success of the IMS
ecosystem. We are pleased to see RADVISION taking part in the IMS Plugfest."

About RADVISION

RADVISION (NASDAQ: RVSN - News) is the industry's leading provider of
market-proven products and technologies for unified visual communications over
IP, 3G and IMS networks. With its complete set of standards-based video
networking infrastructure and developer toolkits for voice, video, data and
wireless communications, RADVISION is driving the unified communications
evolution by combining the power of video, voice, data and wireless - for high
definition video conferencing systems, innovative converged mobile services, and
highly scalable video-enabled desktop platforms on IP, 3G and emerging
next-generation IMS networks. For more information about RADVISION, visit
www.radvision.com.






About the IMS Forum:

The IMS Forum(R) is a global, non-profit industry association devoted to
interoperable IP Multimedia Subsystems services and solutions. IMS Forum's
mission is to accelerate the interoperability of IMS applications and services,
enabling enterprise and residential consumers to quickly benefit from the
delivery of quadruple play voice, video, internet and mobile services over
broadband via cable, wireless and fixed networks. The IMS Forum is the creator
and organizer of the IMS Plugfest(TM), the industry's only event focused on IMS
services interoperability verification and certification.

Through its organized Plugfests, working group interaction, and other
activities, forum members are able to develop cost-effective technical
frameworks for converged IP services over wireline, cable, 3G, WiFi and WiMAX
networks. For additional information or to join the IMS Forum and the IMS
Plugfests, please visit www.IMSForum.org

For Further Information contact:
Cathy N. Clarke
IMS Forum
617-527-2089
pr@imsforum.org

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 Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Stockholders
and other readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We undertake no obligation to update publicly or revise any
forward-looking statement.


Contact:
RADVISION
Tsipi Kagan, +1 201-689-6340
Chief Financial Officer
cfo@radvision.com
or
Media Relations:
Dukas Public Relations
Kristin Conforti, +1 516-320-6839
kristin@dukaspr.com
or
Investor Relations:
Comm-Partners LLC
June Filingeri, +1 203-972-0186
junefil@optonline.net
or
IMS Forum
Cathy N. Clarke, 617-527-2089
pr@imsforum.org







                                                                          ITEM 5






Press Release                                                  Source: RADVISION

RADVISION(R) 3G Products Selected by Deutsche Telefon- und Marketing-Services
GmbH (DTMS) to Provide Mobile Video Communication Services

Monday June 25, 7:00 am ET

TEL AVIV, Israel--(BUSINESS WIRE)--RADVISION (Nasdaq: RVSN - News), a leading
provider of video network infrastructure and developer tools for unified visual
communications over IP, 3G, and emerging next-generation IMS networks, today
announced that Deutsche Telefon- und Marketing-Services GmbH (DTMS), the leading
provider of value added services in Germany, is using RADVISION solutions for
interactive video services for 3G customers. The initial deployment with
RADVISION's carrier-class SCOPIA(TM) 3G Video Gateway is enabling the delivery
of advanced video and voice services over hundreds of concurrent channels.

RADVISION's SCOPIA 3G Video Gateway bridges between IP based video communication
content and 3G handsets, enabling the roll out of a variety of services,
including PC-to-Mobile, video clip streaming, live web cams and surveillance in
the security environment, as well as 3G connectivity with room-based video
conferencing systems.

The service deployment supports DTMS' overall mobile strategy, having defined
the mobile arena as one of the most important market segments in its portfolio,
and becoming one of the leading service providers in Germany developing
multimedia applications for the mobile market.

"DTMS was identified as a key partner to advance the drive towards mobile video
communications in Germany," said Andreas Zenger, Country Manager of RADVISION
GmbH in Germany. "We are proud that RADVISION solutions meet DTMS' requirements
for high quality standards equipment. The SCOPIA 3G Video Gateway was selected
by DTMS for its carrier grade functionality including redundancy, scalability
and availability."

"RADVISION has over 15 years of development experience in video over IP
technologies, and for us, was the only possible partner to provide these
services in Germany," added Bjoern M. Reiter, Manager Mobile Business at DTMS.

About RADVISION

RADVISION (NASDAQ: RVSN - News) is the industry's leading provider of
market-proven products and technologies for unified visual communications over
IP, 3G and IMS networks. With its complete set of standards-based video
networking infrastructure and developer toolkits for voice, video, data and
wireless communications, RADVISION is driving the unified communications
evolution by combining the power of video, voice, data and wireless - for high
definition video conferencing systems, innovative converged mobile services, and
highly scalable video-enabled desktop platforms on IP, 3G and emerging
next-generation IMS networks. For more information about RADVISION, visit
www.radvision.com.






About DTMS - Simply Adding Value:

1998, DTMS 'Deutsche Telefon- und Marketing Services' GmbH was founded in Mainz,
Germany, by a small group of telecommunication specialists. DTMS is rooted in
the world of value added services based on landline (fixed) networks. The
company started its services on the newly liberated telecommunications market in
Germany with a simple and clear message: service numbers and connected value
added services. Since the year 2000, DTMS follows a special service philosophy
for all business customers who have their own call centre organization:
Application Service Providing (ASP) that means the realization of technical
solutions on the DTMS Intelligent Network platform (IN). Through constant
interchange with the customer, DTMS identifies the customer's specific needs,
implements the found approach on the IN platform and develops in the process new
product offerings, applications and improved instruments for call centre
management. The DTMS approach covers all fixed and mobile networks as well as
the internet, and reaches therefore the highest independence from the effects of
convergence. The dialog organization doesn't need to invest in its own hard- and
software solutions for voice based intersections. Today, DTMS is an established
provider for professional voice portals concerning the business customer service
area in Germany, Austria (ATMS, Vienna) and the Czech Republic. DTMS is
shareholder of several companies, among them 11840-Voice Commerce GmbH in Mainz,
As of July 2005, the DTMS belongs to the business process management specialist
group D+S in Hamburg. D+S Europe AG is listed on the SDAX (ISIN DE0005336804).

For further information about DTMS, please contact:
Renate Neuhierl
Public Relations & Public Affairs
Renate.Neuhierl@dtms.de

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 Exchange Commission, including
RADVISION's Form 20-F Annual Report. These documents contain and identify other
important factors that could cause actual results to differ materially from
those contained in our projections or forward-looking statements. Stockholders
and other readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We undertake no obligation to update publicly or revise any
forward-looking statement.


Contact:
RADVISION
Tsipi Kagan, +1-201-689-6340
Chief Financial Officer
cfo@radvision.com
or
Media Relations:
Dukas Public Relations
Kristin Conforti, +1-516-320-6839
kristin@dukaspr.com
or
Investor Relations:
Comm-Partners LLC
June Filingeri, +1-203-972-0186
junefil@optonline.net
or
For further information about DTMS:
Renate Neuhierl
Public Relations & Public Affairs
Renate.Neuhierl@dtms.de





                                                                          ITEM 6








Press Release                         Source: Avistar Communications Corporation

Avistar and RADVISION Announce Patent License Agreement

Thursday June 28, 7:00 am ET

SAN MATEO, Calif. & TEL AVIV, Israel--(BUSINESS WIRE)--Avistar Communications
Corp. (Nasdaq:AVSR - News), a desktop video collaboration platform provider, and
RADVISION(R) Ltd. (Nasdaq:RVSN - News), a leading provider of video network
infrastructure and developer tools for unified visual communications, today
announced that they have entered into an agreement to cross license their patent
portfolios.

Under the license agreement, Avistar UK, a wholly owned subsidiary of Avistar
Communications Corp., has granted RADVISION a non-exclusive worldwide patent
license to all of Avistar's patents for the field of videoconferencing according
to Avistar's standard terms and conditions. RADVISION, in turn, has granted
Avistar a license to all of RADVISION's patents in the same field. As part of
the agreement, RADVISION will make a one-time payment to Avistar UK of
approximately $4.0 million.

"This agreement gives both RADVISION and Avistar the opportunity to leverage
each other's intellectual property to further develop the usage and adoption of
visual communications into the daily workflow, long a goal of Avistar," said
Gerald J. Burnett, Chairman and CEO of Avistar. "Additionally, we welcome the
opportunity to mutually explore the incorporation of RADVISION's infrastructure
into our product offerings."

Boaz Raviv, Chief Executive Officer of RADVISION, stated: "We are pleased that
our licensing discussions with Avistar have opened the door to potential new
opportunities for both of our companies."

About Avistar Communications Corporation

Avistar develops, markets, and supports a video collaboration platform for the
enterprise, all powered by the AvistarVOS(TM) software. From the desktop,
Avistar delivers business-quality video calling, recording, publishing to web
and e-mails, video-on-demand, broadcast origination and distribution, and
document sharing. Avistar video-enables business processes by integrating visual
communications into the daily workflow and connecting communities of users
within and across enterprises. Founded in 1993, Avistar is headquartered in San
Mateo, California, with offices in New York and London. Avistar's technology is
used in more than 40 countries.

Collaboration Properties, Inc. (CPI), a wholly owned subsidiary of Avistar
Communications Corporation, holds a current portfolio of 76 patents for
inventions in the primary areas of video and network technology. CPI pursues
patents for presence-based interactions, desktop video, recorded and live media
at the desktop, multimedia documents, data sharing, and a service-rich video
network architecture to support Avistar's product suite and customers. CPI
offers licenses to its patent portfolio and Avistar's video-enabling
technologies to companies in the video conferencing, rich-media services, public
networking, and related industries. Current licensees include Sony Corporation,
Polycom, Inc., Tandberg ASA and Emblaze-VCON.

For more information, visit www.avistar.com and www.collabprop.com.

About RADVISION

RADVISION (NASDAQ:RVSN - News) is the industry's leading provider of
market-proven products and technologies for unified visual communications over
IP, 3G and IMS networks. With its complete set of standards-based video
networking infrastructure and developer toolkits for voice, video, data and
wireless communications, RADVISION is driving the unified communications
evolution by combining the power of video, voice, data and wireless -- for high
definition video conferencing systems, innovative converged mobile services, and
highly scalable video-enabled desktop platforms on IP, 3G and emerging
next-generation IMS networks. For more information about RADVISION, visit
www.radvision.com.






Forward-Looking Statements

This press release contains forward-looking statements that are subject to risks
and uncertainties, including statements regarding the usage and adoption of
visual communications into the daily workflow, the incorporation of RADVISION's
infrastructure into Avistar's product offerings and potential new opportunities
for Avistar and RADVISION. 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,
changes in the technology or business direction of the two companies, the timing
and amount or cancellation of orders and other risks detailed from time to time
in RADVISION's and Avistar's filings with the Securities Exchange Commission,
including RADVISION's Form 20-F Annual Report and Avistar's Annual Report on
Form 10-K and Quarterly Reports on Form 10-Q. These documents contain and
identify other important factors that could cause actual results to differ
materially from those contained in our projections or forward-looking
statements. Stockholders and other readers are cautioned not to place undue
reliance on these forward-looking statements, which speak only as of the date on
which they are made. We undertake no obligation to update publicly or revise any
forward-looking statement.

Copyright (c) 2007 Avistar Communications Corporation. All rights reserved.
Avistar, AvistarVOS, and the Avistar logo are trademarks or registered
trademarks of Avistar Communications Corporation. Other company, product or
service names may be trademarks or service marks of others.


Contact:
Avistar Communications Corporation
John Carlson, +1-650-525-3365
jcarlson@avistar.com
or
SIPR
Judy Curtis, +1-650-274-1509
judy@SIPR.com
or
RADVISION Ltd.
Tsipi Kagan, +1-203-689-6340
Chief Financial Officer
cfo@radvision.com
or
Comm-Partners LLC
June Filingeri, +1-203-972-0186
junefil@optonline.net








                                   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/Arnold Taragin
                                 -----------------
                                 Arnold Taragin
                                 Corporate Vice President and General Counsel



Date:  June 29, 2007