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 May 2005

                                 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-____________








                                 RADVision Ltd.

6-K Items

     1.   Press  Release  re 3  Hong  Kong  Launches  the  World's  First  Video
          Conference    Service   with    RADVISION   and    WiseSpot's    First
          User-Self-Enabled 3G Video Conference Solution dated May 12, 2005.

     2.   Press  Release re RADVISION to  Participate  in Microsoft  Office Live
          Communications Server 2005 Launch in Greater China dated May 17, 2005.








                                                                          ITEM 1






Release                                                        Source: RADVISION

3 Hong Kong Launches the World's First Video  Conference  Service with RADVISION
and WiseSpot's First User-Self-Enabled 3G Video Conference Solution

Thursday May 12, 10:13 pm ET

HONG KONG--(BUSINESS WIRE)--May 12, 2005--Powered by WiseSpot and RADVISION's
first commercial 3G UMTS video conference solution, 3 Hong Kong has launched the
world's first 3G user-self-enabled video conference service, which allows up to
four 3's customers to participate in a video conference anytime and from
different parts of the world. This service adopts RADVISION's SCOPIA(TM)
advanced video services platform combined with WiseSpot's WiseVSAA video service
application architecture.

WiseSpot, a leading provider of advanced telecommunication value-added solutions
in Greater China, and RADVISION, a global provider of multimedia communication
and conferencing technologies, have combined their experience and expertise to
bring a new dimension to multiparty communication to Hong Kong: that of visual
interaction for up to four 3G users at any one session. This easy-to-use video
conferencing service is completely self-enabled by the 3G user, thus making
pre-booked, operator-assisted service varieties a thing of the past. With this
break-through solution, 3 Hong Kong can deliver enhanced video communication
experience to their customers.

Ms. Agnes Nardi, Managing Director of 3 Hong Kong and Hutchison
Telecommunications (Hong Kong) Limited said, "3 Hong Kong has been leading the
3G development in Hong Kong. By partnering with WiseSpot and RADVISION, we are
pleased to introduce the world's first 3G user-self-enabled video conference
service. This technological breakthrough brings much convenience and flexibility
by allowing customers to engage multiple parties in a single video call to have
business meetings, as well as get-togethers for family and friends."

Franky Lai, Chairman of WiseSpot (Hong Kong) Ltd., said: "With 3G, communication
is no longer confined to voice or static visual elements. WiseSpot is a
forerunner in the development of video solutions that translate the latest
technology into user-friendly services. This video conferencing application
demonstrates how, when combined with professional application development and
implementation, the power of RADVISION's cutting-edge communication technology
can be unleashed to make people's lives easier and more fulfilling."

"RADVISION is happy that Hutchison chose SCOPIA as the core video services
platform upon which they are providing their video conferencing service.
RADVISION believes that the future of 3G is in providing innovative and
revenue-generating visual services. By teaming with WiseSpot as our local
partner, and using RADVISION experience and professional services capabilities,
we are confident that additional and exciting applications will be available to
3G users", said Mr. Eitan Livne, General Manager of RADVISION in Asia Pacific.

The RADVISION's SCOPIA advanced services platform supports real time interactive
video communications between 3G H.324M enabled mobile phones and multiple IP
(SIP and H.323 simultaneously) video conferencing end points using the 3G H.324M
standard for real-time multimedia communications over 3G WCDMA networks. The
RADVISION platform also supports ISDN based video endpoints and all 3G H.324M
mobile endpoints such as 3G enabled laptops, desktops, PDAs and phones.

WiseVSAA is WiseSpot's IP-based, end-to-end solution for video telephony
applications. It allows the development of multiple multimedia applications,
such as video conferencing, video mail, video portal bureau, video surveillance
and video sharing, on one single service application architecture.







About 3 Hong Kong and Hutchison Telecommunications (Hong Kong) Limited

Hutchison Telecommunications (Hong Kong) Limited ("Hutchison Telecom HK"), a
subsidiary of Hutchison Telecommunications International Limited*, is the
largest mobile operator in Hong Kong with over 2 million subscribers. It
provides 3G and 2G services under the "3" brand.

Hutchison Telecom HK has always been a pioneer in the evolution of mobile
development, deploying multiple technologies in Hong Kong since 1985, including
1G analogue (AMPS/TACS), 2G digital (GSM/CDMA), 2.5G high speed data
transmission (GPRS/IS95B) and 3G video mobile communication services (WCDMA). It
was the first operator in Hong Kong to roll out a world-class 3G service,
forming an integral part of Hutchison Whampoa Group's global 3G footprint. With
the launch of 3G services in January 2004 under the "3" brand, Hutchison Telecom
HK has firmly established its leadership position in the 3G market in Hong Kong,
providing a rich portfolio of ground-breaking video mobile communication
services, superb network quality and extensive automatic international roaming
and data roaming coverage.

For more information about "3", please visit the "3" website at www.three.com.hk
 


* Hutchison Telecommunications International Limited is a subsidiary of 
  Hutchison Whampoa Limited.


About WiseSpot (Hong Kong) Limited

WiseSpot, a leading provider of advanced telecommunication value-added solutions
and finished multimedia content in Greater China, was established in 2002 by a
team of professionals that consolidate over 50 years of experience with the
industry. Headquartered in Hong Kong, WiseSpot has successfully established
long-term partnerships with major operators in Greater China and completed over
a dozen significant installations, including Hong Kong's first fixed-SMS based
infotainment system & the first standalone commercial GSM music ringback tone
platform, as well as the world's first self-enabled multi-party mobile video
conference solution. For further information, please visit www.wisespotgroup.com

About RADVISION Carrier Solutions

RADVISION has a ten year track record in pioneering multimedia communications
and conferencing solutions for the service provider market - both IP wireline
and more recently broadband wireless. The company offers its SCOPIA carrier
infrastructure, developer toolkits,and professional services for equipment
developers and service providers to develop and/or offer their customers a wide
variety of high-revenue multimedia solutions and services including: IP
telephony, point-to-point and multipoint video telephony, wireless to landline
(IP) video connectivity services, group video chats and videoconferencing, video
residential telephony,broadband remote surveillance/monitoring, 3G video
streaming, video mail connectivity, and real-time multimedia gaming.

--------------
Contact:
     Corporate Contacts:
     RADVISION
     Tsipi Kagan, 201-689-6340
     cfo@radvision.com
     or
     3 Hong Kong
     Frances Ng, 852 2128 2104
     frances.ng@hthk.com
     or
     Text 100
     Ernest Chan, 852 2251 8246
     Ernest.chan@text100.com.hk
     or
     Investor Relations:
     Comm-Partners LLC
     June Filingeri, 203-972-0186
     junefil@optonline.net
     








                                                                          ITEM 2









Press Release                                             Source: RADVISION LTD.

RADVISION to Participate  in Microsoft  Office Live  Communications  Server 2005
Launch in Greater China

Tuesday May 17, 4:30 pm ET

RADVISION Will Demonstrate Click to Meet(TM) for Microsoft Office, Enabling
Multiparty Audio and Visual Communications with Microsoft Live Communication
Server 2005 and Office Communicator 2005 HONG KONG & FAIR LAWN, N.J.--(BUSINESS
WIRE)--May 17, 2005-- RADVISION (Nasdaq: RVSN - News) today announced its
continued support of Microsoft's Live Communication Server and Office
Communicator by demonstrating its award winning desktop conferencing solution
Click to Meet for Microsoft Office at the Microsoft Real Time Collaboration road
show in Greater China.

The Microsoft launch event will commence May 18th in Shanghai and continue in
Hong Kong, Taipei, Guangzhou and Beijing. Microsoft will be presenting LCS 2005
and Office Communicator for rich presence, integrated communications
capabilities and enhanced Microsoft Office system integration. Its rich presence
and integrated capabilities represent a major advance in enabling users to find,
connect, communicate and collaborate in real time with colleagues, partners and
customers, regardless of location.

As the exclusive visual communications partner at this event, RADVISION will be
demonstrating Click to Meet multiparty voice, video and data conferencing with
full connectivity to all voice and video devices. Click to Meet can immediately
escalate an Instant Messaging chat session into a multipoint audio, video, and
data session within Office Communicator 2005 or the Windows Messenger 5.1
client. Click to Meet provides the intelligence behind the scenes to create the
conference across multiple servers, and to route and connect all conference
participants.

"Video conferencing is extremely important for our Chinese customers. Microsoft
is very excited to announce the availability of RADVISION's Click to Meet
multiparty video conferencing solution running on LCS2005. We predict that
starting video conferences straight from Communicator will significantly
increase videoconferencing usage. Our partnership with RADVISION started with
deep integration of our products and we are delighted to bring this
sophisticated solution to market at the launch of our collaboration tools in
Greater China" said Peter de Zoete, Sales and Marketing Director of the
Real-Time Collaboration Group at Microsoft, Greater China. "RADVISION's Click to
Meet solution is an excellent fit for our vision of delivering presence-based
integrated voice, video, and data solutions to any end point - whether in the
meeting room, desktop, or on the road over 3G mobile."

"The employee desktop is becoming the leading choice for multimedia
communications - driven by low cost and easy-to-use devices and software end
points brought to market by Microsoft and others," said Eitan Livne, General
Manager of RADVISION, Asia Pacific. "Microsoft's continued efforts in delivering
rich presence and integrated communications capabilities are taking the industry
to a new level of collaborative communications and we are proud to be
complementing their solution with our market proven technology and expertise."

About RADVISION

RADVISION LTD. (Nasdaq: RVSN - News) is the industry's leading provider of high 
quality, scalable and easy-to-use products and technologies for 
videoconferencing, video telephony, and the development of converged voice, 
video and data over IP and 3G networks. 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 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:
     Corporate Contacts:
     RADVISION
     Tsipi Kagan, 201-689-6340
     cfo@radvision.com
     or
     Microsoft PR Manager
     Winne Lai, +852-25782595
     winne@shoutasia.com
     or
     Investor Relations:
     Comm-Partners LLC
     June Filingeri, 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:  May 31, 2005