Press Release

Data Connection Participates in Global SIP Interoperability Test Event, SIPit 19

SIPit 19 Advances Session Initiation Protocol (SIP) Technology

London, UK: November 3, 2006. Data Connection Limited (DCL), the world's leading independent provider of communications protocol software, announced today its participation in SIPit 19, the nineteenth SIP interoperability test (SIPit) event organized by the SIP Forum (www.sipforum.org).

SIPit is a week-long event, held twice a year, to improve the quality of the SIP specification and forge global interoperability among SIP implementations. Data Connection was one of over seventy vendors who participated in the event, which was hosted by the University of New Hampshire Interoperability Laboratory.

At the event Data Connection deployed DC-SIP, its carrier grade protocol stack utilized by softswitches, gateways, servers, phones, access devices, and IMS applications throughout the world. DC-SIP, which includes IPv6 functionality, successfully interoperated with a number of SIP solutions in peer-to-peer and multiparty test environments.

"The SIPit events are a great opportunity to ensure industry compatibility and advance SIP technology in general. For example, we were able to confirm multi-vendor interoperability with our IPv6 implementation in a matter of hours," said Jonathan Cumming, Data Connection's Director of VoIP Product Management for Networking Protocols. "This is why Data Connection has been a frequent participant in the past SIPit events and plans to continue its involvement."

About DC-SIP

DC-SIP is one of Data Connection's family of VoIP protocol toolkits. These provide portable source code, full reference designs, test applications, customization tools, and pre-integration with all the leading Operating Systems. The toolkits, combined with Data Connection's superior customer service organization and unrivaled commitment to quality, provide customers with significant project cost savings and the quickest time to market.

About Data Connection

Data Connection Limited (DCL) is the leading independent developer and supplier of Unicast and Multicast IP Routing, MPLS, SIP, MGCP/Megaco, SBC, ATM and SNA portable products, as well as Web Conferencing, Voicemail, Unified Messaging, and Directory applications. The company's MetaSwitch division supplies industry-leading IP Multimedia Subsystem (IMS) switching and applications solutions for both packet and circuit-switched networks. Its widely deployed call agent, media/signaling gateway and application server platform supports a full range of legacy Class 4/5 capabilities and hosted unified communications services, and scales from a few hundred to millions of subscribers in both integrated and distributed configurations.

Net profits have exceeded 20% of revenue every year since the company was founded in 1981. Customers include the world's largest software and hardware vendors, including Cisco, IBM, Lucent, and Microsoft, and major telecommunications service providers such as AT&T, BT, France Telecom and Verizon. With over 300 employees, Data Connection is headquartered in London, UK with US offices in Alameda, CA, Boxborough, MA, Dallas, TX and Reston, VA. For more information, please see www.dataconnection.com and www.metaswitch.com.

Data Connection and MetaSwitch are trademarks of Data Connection Limited and Data Connection Corporation. Brands and products referenced herein are the trademarks or registered trademarks of their respective holders. Copyright ©2006 Data Connection Limited.