Allot's Intelligent Charging Solution Selected by Multinational Mobile Operator to Deploy New Pricing Models

Allot ChargeSmart Enables Revenue Boost for Operators and Improved Choice and Transparency for Subscribers

LTE World Summit, AMSTERDAM, Netherlands, May 17, 2011 - Allot Communications Ltd. (NASDAQ: ALLT), a leading supplier of service
optimization and revenue generation solutions for fixed and mobile broadband
service providers worldwide, announced today that its intelligent charging
solution, Allot ChargeSmart, has been selected by a multinational mobile
operator. The converged charging solution, which is built on Allot Service
Gateway, will be deployed in nine countries, serving approximately 30 million
subscribers. Allot's intelligent charging solution is unique in its ability
to accurately identify OTT (over-the-top) applications in high speed
networks. This precise high-speed identification provides intelligence about
subscriber and application usage previously unavailable to charging systems,
thereby enabling the operator to better monetize network traffic in ways that
reflect its true value for both the operator and the subscriber.

(Photo: www.newscom.com/cgi-bin/prnh/20110517/455888 )

The operator leverages the intelligence provided by Allot's solution to
support new charging models, such as content revenue sharing and new service
plans based on volume quotas, service tiering and popular application types.
One of the implementations of ChargeSmart for post-paid subscribers is a
Social Networking Plan that makes applications such as Facebook, MySpace &
Twitter 'toll-free', whilst all other application traffic is counted against
the monthly quota. An implementation for pre-paid subscribers involves
traditional tiered-service offerings where the subscriber selects a plan
based on an application-volume-throughput-time combination. Using ChargeSmart
to meter usage in real time, the operator notifies the subscriber when their
usage approaches the quota limit and redirects them to a portal where the
subscriber can top-up volume, if desired.

"As the mobile data market matures, operators are showing an increasing
readiness to adopt more personalized subscriber pricing models, as well as
institute revenue sharing models with content providers," explained Rami
Hadar, Allot's President and CEO. "Allot's ChargeSmart helps operators close
the widening gap between traffic load and revenues by offering subscribers
increased choice and control while charging based on actual usage. It also
strengthens their position in the mobile value chain by enabling new revenue
sharing models between content providers and operators."

About Allot Communications

Allot Communications Ltd. (NASDAQ: ALLT) is a leading provider of
intelligent IP service optimization and revenue generation solutions for
fixed and mobile broadband operators and large enterprises. Allot's rich
portfolio of solutions leverages Dynamic Actionable Recognition Technology
(DART) to transform pipes into smart networks that can rapidly and
efficiently deploy value added Internet services. Allot's scalable,
carrier-grade solutions provide the visibility, topology awareness, security,
application control and subscriber management that are vital to managing
Internet service delivery, enhancing user experience, containing operating
costs, and maximizing revenue in broadband networks.

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 the successful
deployment of the Allot ChargeSmart, in the various networks of the
multinational mobile operator that selected that solution to serve
approximately 30 million subscribers. 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: 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 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.

    Allot Communications Contacts

    Jonathon Gordon
    Allot Communications
    Tel: +972-9-7619423
    jgordon@allot.com

    PR Contact
    Justine Schneider
    Calysto Communications
    Tel: +1-404-266-2060 x507
    jschneider@calysto.com

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