UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FForm ~~O R M~~ 6-K

REPORT OF FOREIGN PRIVATE ISSUER ~~PURSUANT TO RULE 13a-16 OR 15d-16~~

PURSUANT TO RULE 13A-16 OR 15D-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of March 2012 (Report No. 3)

Commission File Number: 0-29871

RADVISION LTD.

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

24 Raoul Wallenberg Street, Tel Aviv 69719, Israel

(Address of ~~Principal~~principal ~~Executive~~executive ~~Office~~offices)

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 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): oN/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): oN/A

~~Indicate~~THE byINFORMATION ~~check~~SET ~~mark~~FORTH ~~whether~~IN byTHIS ~~furnishing~~REPORT ~~the~~ON ~~information~~FORM ~~contained~~6-K inIS ~~this~~HEREBY ~~Form,~~INCORPORATED ~~the~~BY ~~registrant~~REFERENCE isINTO ~~also~~THE ~~thereby~~REGISTRANT'S ~~furnishing~~REGISTRATION ~~the~~STATEMENTS ~~information~~ON toFORM ~~the~~S-8 ~~Commission~~(REGISTRATION ~~pursuant~~STATEMENT toNOS. ~~Rule~~333-127013, ~~12g3~~333-~~2(b~~141654, 333-155442, 333-155444, 333-164091 and 333-179425), ~~under~~AND ~~the~~SHALL ~~Securities~~BE ~~Exchange~~A ~~Act~~PART ofTHEREOF ~~1934~~FROM THE DATE ON WHICH THIS REPORT IS FILED, TO THE EXTENT NOT SUPERSEDED BY DOCUMENTS OR REPORTS SUBSEQUENTLY FILED OR FURNISHED.

~~Yes o No x~~CONTENTS

IfOn ~~"Yes"~~March is21, ~~marked~~2012, ~~indicate~~RADVISION ~~below~~Ltd., an Israeli company (the ~~file~~“Company”), ~~number~~issued ~~assigned~~a notice calling an Extraordinary General Meeting of Shareholders that will take place on April 30, 2012 in order to approve, among others, the ~~registrant~~Merger inAgreement, ~~connection~~dated ~~with~~March ~~Rule~~14, ~~12g3-2(b):~~2012, ~~82-~~by and among the Company, Avaya Inc., and Sonic Acquisition Ltd. A copy of the Company’s notice announcing the Extraordinary General Meeting is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

~~This Form 6-K is being incorporated by reference into the Registrant’s Form S-8 Registration Statements File Nos. 333-127013, 333-141654, 333-155442, 333-155444, 333-164091 and 333-179425.~~SIGNATURES

RADVision Ltd.

EXPLANATORY NOTE

The following exhibits are attached:

99.1 Agreement and Plan of Merger, dated as of March 14, 2012, among Avaya, Inc., Sonic Acquisition Ltd. and RADVision Ltd.

99.2 Amended Articles of Association of RADVision Ltd., as filed with the Israel Company Registrar November 2011.

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. ~~(Registrant)~~ By: /s/ Rael Kolevsohn Name: Rael Kolevsohn Title: Corporate Vice President and General Counsel

Date: March 21, 2012

EXHIBIT INDEX

EXHIBIT NO.	DESCRIPTION
99.1	Agreement and Plan of Merger, dated as of March 14, 2012, among Avaya, Inc., Sonic Acquisition Ltd. and RADVision Ltd.
99.2	Amended Articles of Association of RADVision Ltd., as filed with the Israel Company Registrar November 2011.

Exhibit

Number

Description of Exhibit

99.1	RADVISION Notice of Extraordinary General Meeting of Shareholders, dated March 21, 2012.

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