Tatara Systems Announces Partnership with Acme Packet for SIP-Based Femtocell Network Integration

Tatara Convergence Server Featured in Demonstration of SIP-based Femtocells with
Acme Packet & AirWalk Communications` Femtocell at CTIA Wireless 2009
ACTON, Mass.--(Business Wire)--
Tatara Systems, the leader in SIP-based femtocell convergence, today announced
that it has partnered with Acme Packet (NASDAQ: APKT), the leader in session
border control solutions, ensuring interoperability between Tatara`s Convergence
Server and Acme Packet`s multiservice security gateway and session border
controller (SBC) to deliver SIP-based femtocell solutions for mobile operators.
Tatara, Acme Packet and AirWalk Communications will conduct live demonstrations
of SIP-based femtocell network integration at the CTIA Wireless 2009 event,
April 1-3, 2009 at the Las Vegas Convention Center in Las Vegas, NV.

Femtocells have the potential to extend the reach of a mobile operator`s network
into homes, and enterprises, positively impacting the customer experience for
millions of subscribers by enhancing coverage, and providing capacity for
bandwidth hungry applications. Tatara has staked out an early leadership
position in this market, as the first vendor to deliver a SIP-based solution for
femtocell network integration. As noted by most industry analysts, IP-based
femtocell deployment is the only method that offloads the legacy mobile core
infrastructure, thereby providing the capacity needed for 3G service delivery
and enabling operators to recognize substantial cost savings through OPEX and
CAPEX optimization.

The Tatara Convergence Server (TCS) solution enables the interconnection of
femtocells and other advanced technology IP-based radio network elements with
the legacy macro network, providing the full mobile voice, messaging and data
experience in an IP environment supporting both VoIP and IMS networks. The TCS
capabilities include authentication of the mobile subscribers, handoff between
femtocells and the macro network, emergency and supplementary services, as well
as delivering new IP-based applications to existing mobile handsets without
modifying or disrupting the macro network. The TCS is available in a CDMA or
GSM/UMTS variant.

A demonstration of voice and data service delivery using SIP femtocells will
take place in theAcme Packet booth 5741. Within the demonstration, Acme Packet`s
Net-Net Security Gateway (SG) and Net-Net Session Director (SD) will connect
SIP-based femtocells to an IMS/NGN data center. The femtocell, a CDMA AirWalk
EdgePoint, converts legacy signaling and media to SIP and RTP for transport over
broadband Internet access connections. The Net-Net SG provides the femtocell
security gateway function for securely tunneling voice and data traffic across
the Internet using IPsec tunnels. Acme Packet`s Net-Net SD session border
controller provides SIP session control, including denial-of-service protection,
admission control, protocol normalization and other cost and quality controls.
Acme Packet`s SBC also routes traffic to Tatara Systems` Tatara Convergence
Server (TCS) which provides voice, messaging and supplementary services as well
as active session handover to the macro cellular network. AirWalk Communications
(booth 8127) and Tatara Systems (booth 8951) will also be demonstrating the CDMA
SIP femtocell solution.

"As our partner ecosystem continues to grow, it helps to solidify our leadership
in the femtocell market," stated Marc Cremer, executive vice president of
operations for Tatara Systems. "With key industry players embracing our
SIP-based femtocell convergence solution, it serves to increase the momentum
towards the delivery of new IP-based applications and the seamless migration to
next-generation VoIP and IMS architectures."

"SIP is the signaling protocol for next generation communications and 3GPP
architectures," commented Seamus Hourihan, Acme Packet`s vice president of
marketing and product management. "It is critical to work with leading vendors,
such as Tatara Systems, to deliver proven interoperable solutions in order to
successfully expedite the transition to SIP for femtocells and all voice
services."

About Acme Packet:

Acme Packet, Inc. (NASDAQ: APKT), the leader in session border control
solutions, enables the delivery of trusted, first-class interactive
communications-voice, video and multimedia sessions-and data services across IP
network borders. Our Net-Net family of session border controllers, multiservice
security gateways and session routing proxies supports multiple applications in
service provider, large enterprise and contact center networks--from VoIP
trunking to hosted enterprise and residential services to fixed-mobile
convergence. They satisfy critical security, service assurance and regulatory
requirements in wireline, cable and wireless networks; and support multiple
protocols-SIP, H.323, MGCP/NCS and H.248-and multiple border
points-interconnect, access and data center. Our products have been selected by
more than 635 customers in 92 countries, including 29 of the top 30, and 89 of
the top 100 service providers in the world. For more information, contact us at
+1 781.328.4400, or visit www.acmepacket.com.

About AirWalk Communications:

AirWalk Communications, Inc. is a developer of IP CDMA Radio Access Network
(IP-RAN) products that deliver 3G voice and data platforms. AirWalk`s products
are modular, stackable and increase coverage and capacity. AirWalk delivered the
industry's first base station and base station controller in a single,
inexpensive, compact platform. The company's radio products operate on the
global CDMA licensed frequencies and offer operators new sources of revenue. For
more information, visit www.airwalkcom.com.

About Tatara Systems:

Tatara Systems is the world leader in SIP-based femtocell convergence,
supporting both IMS and pre-IMS standards based architectures. Tatara`s
cost-effective, highly scalable and future-proof approach to femtocell
deployment provides seamless integration with the legacy network plus enables
operators to deliver next-generation residential and business services without
re-engineering the incumbent mobile core. The Tatara Convergence Server solution
provides service interworking; delivers unified voice, messaging and data
services; and provides uniform calling and feature plans across diverse
networks. Tatara is working with its customers and partners to speed the
deployment of femtocells worldwide. For more information, visit
www.tatarasystems.com.

For Acme Packet:
Media and Analyst Contact:
Connect2 Communications
Joyce Wady, +1-919-554-3532 x2
joyce@connect2comm.com
or
Investor Relations:
Acme Packet
Brian Norris, +1 781-328-4790
bnorris@acmepacket.com
or
For AirWalk:
Sharon Roberts, +1 469-484-4732
sroberts@airwalkcom.com
or
For Tatara Systems:
Kelly Friedland, +1 978-206-0831
kfriedland@tatarasystems.com

Copyright Business Wire 2009