UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

~~Form~~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

~~PURSUANT~~For TOthe ~~RULE~~month ~~13A-16~~of ORMarch ~~15D-16~~2012

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of March 2012 (Report No. 4)

Commission File Number: 0-29871

RADVISION LTD.

(~~Translation~~Name of ~~registrant’s name into English~~Registrant)

24 Raoul Wallenberg Street, Tel Aviv 69719, Israel

(Address of ~~principal~~Principal ~~executive~~Executive ~~offices~~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 T Form 40-F o*

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): ~~N/A~~*

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): ~~N/A~~*

~~THE~~Indicate ~~INFORMATION~~by ~~SET~~check ~~FORTH~~mark INwhether ~~THIS~~by ~~REPORT~~furnishing ONthe ~~FORM~~information ~~6-K~~contained ISin ~~HEREBY~~this ~~INCORPORATED~~Form, BYthe ~~REFERENCE~~registrant ~~INTO~~is ~~THE~~also ~~REGISTRANT'S~~thereby ~~REGISTRATION~~furnishing ~~STATEMENTS~~the ONinformation ~~FORM~~to ~~S-8~~the ~~(REGISTRATION~~Commission ~~STATEMENT~~pursuant ~~NOS.~~to ~~333-127013,~~Rule ~~333~~12g3-~~141654, 333-155442, 333-155444, 333-164091 AND 333-179425~~2(b), ~~AND~~under ~~SHALL~~the BESecurities AExchange ~~PART~~Act ~~THEREOF~~of ~~FROM THE DATE ON WHICH THIS REPORT IS FILED, TO THE EXTENT NOT SUPERSEDED BY DOCUMENTS OR REPORTS SUBSEQUENTLY FILED OR FURNISHED~~1934.

~~CONTENTS~~Yes * No T

~~This~~If ~~report on Form 6-K of Radvision Ltd. (~~"~~Radvision~~Yes") ~~consists~~is ofmarked, ~~the~~indicate ~~following~~below ~~documents,~~the ~~which~~file ~~are~~number ~~hereby~~assigned ~~attached~~to ~~hereto~~the ~~and~~registrant ~~incorporated~~in byconnection ~~reference~~with ~~herein~~Rule 12g3-2(b): 82-________

~~(1)~~This ~~Proxy~~Form ~~Statement~~6-K inis ~~connection~~being ~~with~~incorporated ~~the~~by ~~Extraordinary~~reference ~~General~~into ~~Meeting~~the ofRegistrant’s ~~Shareholders~~Form ofS-8 ~~Radvision~~Registration toStatements beFile ~~held~~Nos. on333-127013, ~~April 30~~333-141654, ~~2012~~333-155442, ~~attached as Exhibit 99.1 hereto~~333-155444, 333-164091 ~~together~~and ~~with the following appendices thereto:~~333-179425.

~~(a)~~RADVision ~~Appendix A – Merger Agreement by and among Avaya Inc., Sonic Acquisition~~ Ltd. ~~and Radvision, dated as of March 14, 2012, attached as Exhibit 99.1(a) hereto;~~

~~(b)~~EXPLANATORY ~~Appendix B – Opinion of Jefferies & Co., Inc., attached as Exhibit 99.1(b) hereto;~~NOTE

~~(c)~~The ~~Appendix~~following Cexhibits –are ~~Form of Voting Agreement,~~ attached ~~as Exhibit 99.1(c) hereto; and~~:

~~(d)~~99.1 ~~Appendix~~Press DRelease –re ~~Form~~RADVISION ofTeams ~~Indemnification~~with ~~Agreement,~~Other ~~attached~~Leading asVendors ~~Exhibit~~to ~~99.1(d)~~Offer ~~hereto.~~Hosted UC Reference Architecture dated March 6, 2012

(99.2) Press ~~Form~~Release ofre ~~Proxy~~RADVISION ~~Card~~to ~~for~~Demonstrate ~~holders~~Innovation ofand ~~Ordinary~~Thought ~~Shares~~Leadership ofat ~~Radvision~~Enterprise inConnect ~~connection~~Orlando ~~with~~dated ~~the~~March ~~Extraordinary General Meeting of Shareholders of Radvision~~22, ~~to be held on April 30,~~ 2012~~, attached as Exhibit 99.2 hereto.~~

~~SIGNATURES~~SIGNATURE

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.
Date: March 28, 2012	By:	/s/ Rael Kolevsohn
		Name: Rael Kolevsohn
		Title: Corporate Vice President and General Counsel

	RADVISION LTD.
	(Registrant)


	By: /s/Rael Kolevsohn
	Rael Kolevsohn
	Corporate Vice President and General Counsel

Date: March 30, 2012

EXHIBIT INDEX

Exhibit	Description
EXHIBIT NO.	DESCRIPTION
Number	of Exhibit
99.1	Press Release re RADVISION Teams with Other Leading Vendors to Offer Hosted UC Reference Architecture dated March 6, 2012
99.1	Proxy Statement in connection with the Extraordinary General Meeting of Shareholders of Radvision to be held on April 30, 2012.
99.2	Press Release re RADVISION to Demonstrate Innovation and Thought Leadership at Enterprise Connect Orlando dated March 22, 2012
99.1(a)	Appendix A – Merger Agreement by and among Avaya Inc., Sonic Acquisition Ltd. and Radvision, dated as of March 14, 2012.
99.1(b)	Appendix B – Opinion of Jefferies & Co., Inc.
99.1(c)	Appendix C - Form of Voting Agreement.
99.1(d)	Appendix D - Form of Indemnification Agreement.
99.2	Form of Proxy Card for holders of Ordinary Shares of Radvision in connection with the Extraordinary General Meeting of Shareholders of Radvision to be held on April 30, 2012.

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