Allot MobileTrends: Global Mobile Broadband Traffic Report Shows Significant 72% Growth in Worldwide Mobile Data Bandwidth Usage in H2, 2009

Video is the Single Most Influential Factor Driving the Need for Increased Network Capacity; YouTube Captures 10% of Global Mobile Bandwidth

BOSTON, Massachusetts, February 8 - Allot Communications Ltd. (NASDAQ: ALLT), (www.allot.com/) a
leader in IP service optimization and revenue generation solutions based on
Dynamic Actionable Recognition Technology (DART), announced today that its
Allot MobileTrends: Global Mobile Broadband Traffic Report (
www.allot.com/mobiletrends.html) indicates that worldwide mobile data
bandwidth usage has increased significantly by approximately 72% during the
second half of 2009. Over-the-top applications such as YouTube and Skype are
driving this continued momentum in mobile broadband growth. APAC leads the
growth with 86%; EMEA posted 70% growth and the Americas 59%. The Allot
MobileTrends Report, which tracks global IP application usage and growth,
collected statistics from leading mobile operator networks worldwide with a
combined user base of more than 180 million subscribers.

(Photo: www.newscom.com/cgi-bin/prnh/20100208/376556 )

The Allot MobileTrends Report validates video as a mainstream medium and
demonstrates that it is the single most influential factor driving the need
for increased mobile network capacity. However, with P2P remaining the
biggest cause of cell congestion in the top 5% of cells, mobile broadband
networks are still facing the same challenges as fixed networks - growing
bandwidth demands, congestion, as well as finding ways to enhance the user
experience and to lessen the negative impact of a few subscribers on the
network.

    According to Allot MobileTrends Report:

    - HTTP streaming continues to be the fastest growing
      application with a 99% increase; its global mobile broadband share grew
      by 50% between Q2 and Q4, 2009.

    - YouTube accounted for 10% of global bandwidth during Q3 and
      Q4, 2009.

    - FaceBook experienced tremendous growth of 180% during the
      second half of 2009.

    - Skype is the undisputed VoIP traffic market leader,
      accounting for 77% of the global VoIP bandwidth; VoIP and IM
      applications have increased significantly by almost 47%.

    - HTTP downloads grew by 73%, and have become a feasible
      alternative for massive file sharing.

    - P2P is the single largest factor leading to cell congestion
      which accounts for 34% of bandwidth utilization in the top 5% of cells.

"Our MobileTrends Report is a valuable tool for mobile network operators
who need insight into subscriber behavior across applications and regions,"
said Rami Hadar, President and CEO of Allot Communications. "It highlights
how mobile data services are evolving and the extent of their influence over
the subscriber, which in turn, helps the operator understand the significance
of adapting their networks for the continued demand for optimized bandwidth."

The Allot MobileTrends Report data was collected from July 1 to December
31, 2009 using the long term reporting capabilities of Allot NetXplorer,
(www.allot.com/NetXplorer.html) Allot's centralized management and
reporting system. The length of the collection period allows accurate
identification of usage trends and patterns, reducing the influence of
temporary events in the monitored networks.

The full Allot MobileTrends: Global Mobile Bandwidth Report (complete
with graphics) can be found on www.allot.com/mobiletrends.html.

About Allot Communications

Allot Communications Ltd. (NASDAQ: ALLT) is a leading provider of
intelligent IP service optimization solutions for fixed and mobile broadband
operators and large enterprises. 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. 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 Allot's plans, objectives and
expectations for future operations. 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 Allot's products; Allot's inability to
develop and introduce new technologies, products and applications; loss of
market; and other factors discussed under the heading "Risk Factors" in
Allot'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 Allot 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
    Director of Marketing
    Allot Communications
    Tel: +972-9-7628423
    jgordon@allot.com

    PR Contact
    Danielle Matthews
    Calysto Communications
    Tel: +1-404-266-2060 x27
    dmatthews@calysto.com

Allot Communications Contacts: Jonathon Gordon, Director of Marketing, Allot Communications, Tel: +972-9-7628423, jgordon at allot.com; PR Contact, Danielle Matthews, Calysto Communications, Tel: +1-404-266-2060 x27, dmatthews at calysto.com