UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington D.C. 20549

Form 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 March 2012 (Report No. 34)

Commission File Number: 0-29871

RADVISION LTD.

(Translation of registrant’s name into English)

24 Raoul Wallenberg Street, Tel Aviv 69719, Israel

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover 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): 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 INFORMATION SET FORTH IN THIS REPORT ON FORM 6-K IS HEREBY INCORPORATED BY REFERENCE INTO THE REGISTRANT'S REGISTRATION STATEMENTS ON FORM S-8 (REGISTRATION STATEMENT NOS. 333-127013, 333-141654, 333-155442, 333-155444, 333-164091 ~~and~~AND 333-179425), AND SHALL BE A PART THEREOF FROM THE DATE ON WHICH THIS REPORT IS FILED, TO THE EXTENT NOT SUPERSEDED BY DOCUMENTS OR REPORTS SUBSEQUENTLY FILED OR FURNISHED.

CONTENTS

OnThis ~~March~~report ~~21,~~on ~~2012,~~Form ~~RADVISION~~6-K of Radvision Ltd., ~~an Israeli company~~ (~~the “Company”~~"Radvision"), ~~issued~~consists ~~a notice calling an Extraordinary General Meeting~~ of ~~Shareholders that will take place on April 30, 2012 in order to approve, among others,~~ the ~~Merger~~following ~~Agreement~~documents, ~~dated~~which ~~March~~are ~~14,~~hereby ~~2012, 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. herein:

(1)	Proxy Statement in connection with the Extraordinary General Meeting of Shareholders of Radvision to be held on April 30, 2012, attached as Exhibit 99.1 hereto, together with the following appendices thereto:

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

(c)	Appendix C – Form of Voting Agreement, attached as Exhibit 99.1(c) hereto; and

(d)	Appendix D – Form of Indemnification Agreement, attached as Exhibit 99.1(d) hereto.

(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, attached as Exhibit 99.2 hereto.

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

	RADVISION LTD.

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

Date: March 21, 2012

EXHIBIT INDEX

Exhibit Number Description of Exhibit

Exhibit	Description
Number	of Exhibit

99.1	Proxy Statement in connection with the Extraordinary General Meeting of Shareholders of Radvision to be held on April 30, 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.

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

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