6-K

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 May 2012

Commission File Number: 001-33129

Allot Communications Ltd.

(Translation of registrant's name into English)

22 Hanagar Street

Neve Ne’eman Industrial Zone B

Hod-Hasharon 45240

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): ____

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 o No x

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

EXPLANATORY NOTE

On May 15, 2012, Allot Communications Ltd. issued a press release announcing the closing of the acquisition of Ortiva Wireless, Inc.

A copy of the press release is attached to this Form 6-K as Exhibit 99.1 and is incorporated herein by reference.

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.

Allot Communications Ltd.
By:	/s/ Donna Rahav
	Donna Rahav
	Deputy General Counsel

Date: May 15, 2012

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EXHIBIT INDEX

The following exhibit has been filed as part of this Form 6-K:

Exhibit	Description
99.1.	Press Release Announcing Closing of the Acquisition of Ortiva Wireless Dated May 15, 2012

3

EX-99.1

Exhibit 99.1

Allot Communications Closes Ortiva Wireless Acquisition

Hod Hasharon, Israel, May 15, 2012 - Allot Communications Ltd. (NASDAQ: ALLT), a leading provider of service optimization and revenue generation solutions for fixed and mobile data networks worldwide, today announced that it has closed the previously announced purchase agreement for Ortiva Wireless.

About Allot

Allot Communications Ltd. (NASDAQ: ALLT) is a leading provider of intelligent data traffic optimization and monetization solutions for fixed and mobile broadband operators and large enterprises worldwide. Allot's scalable, carrier-grade solutions provide the visibility, topology awareness, security, application control and subscriber management that are vital to managing fixed and mobile data, enhancing user experience, containing operating costs, and enabling service providers to generate revenues from their broadband networks.  Allot's rich portfolio of solutions leverages dynamic actionable recognition technology (DART) to transform broadband pipes into smart networks that can rapidly and efficiently deploy value added Internet services. For more information, please visit http://www.allot.com.

Safe Harbor Statement

Information provided in this press release may contain statements relating to current expectations, estimates, forecasts and projections about future events that are "forward-looking statements" as defined in the Private Securities Litigation Reform Act of 1995. These forward-looking statements generally relate to the company's plans, objectives and expectations for future operations, including without limitation the company’s integration vision and expected revenues and operating expenses in connection with the acquisition described in this press release. These forward-looking statements are based upon management's current estimates and projections of future results or trends. Actual future results may differ materially from those projected as a result of certain risks and uncertainties. These factors include, but are not limited to: the integration of Ortiva Wireless technology, business, and operations with those of the company, increased demand for video optimization solutions in mobile networks, changes in general economic and business conditions and, specifically, a decline in demand for the company’s products; the company’s inability to develop and introduce new technologies, products and applications; loss of market; and other factors are discussed under the heading "Risk Factors" in the company's annual report on Form 20-F filed with the Securities and Exchange Commission. These forward-looking statements are made only as of the date hereof, and the company undertakes no obligation to update or revise the forward-looking statements, whether as a result of new information, future events or otherwise.

Investor Relations Contact:

Jay Kalish

Executive Director Investor Relations

International access code +972-54-221-1365

jkalish@allot.com

Marketing Communications

Jonathon Gordon

Director of Marketing

International access code + 972 9 762 8423

International access code + 972 54 223 3589

jgordon@allot.com