TOLLBRIDGE/PROMATORY ENABLE CARRIERS TO OFFER INTEGRATED DSL.

Promatory Communications and TollBridge Technologies have successfully tested for interoperability a proven, end-to-end carrier-ready solution for delivering toll-quality voice and data services using Digital Subscriber Line (DSL) technology.

Under the terms of the resulting partnership, TollBridge has joined Promatory's Toll Quality Voice (TQV) program designed to the ensure voice and data Quality of Service (QoS) in DSL networks.

"We have partnered with TollBridge to provide an end-to-end solution that enables carriers to deliver integrated voice and data services to small- and medium-sized business customers in a cost-effective manner," said Roger Dorf, president and CEO of Promatory Communications. "We are beating the curve in this competitive marketplace by offering a solution today that allows carriers to bring new value to their business-customer relationships."

"In a competitive marketplace, the carriers that are first to offer integrated voice and data in the small- and medium-sized business sector will have a distinctive advantage," said Gary Tauss, president and CEO of TollBridge Technologies. "Our relationship with Promatory will enable us to continue producing reliable, affordable solutions that position Competitive Local Exchange Carriers (CLECs) securely in this lucrative market segment."

Proven Interoperable Solution

This integrated, end-to-end solution requires TollBridge's TB 50 at the customer premise as well as Promatory's Intelligent Multiservice Access System (IMAS(tm) ) and TollBridge's TB 200 Local Exchange Gateway at a carrier's central office (CO). The TB 50 packetizes voice and data traffic at the customer premise for transport over DSL. QoS parameters are assigned to both voice calls and data applications to guarantee quality performance.

At the CO, Promatory's IMAS terminates the DSL connections, providing concentration and ATM switching while maintaining full QoS support. While data circuits are switched to the data network, voice circuits are passed via high-speed DS-3 or OC-3 links to the TollBridge TB 200. The TB 200 unpacks the voice channels, converts them back into circuits, and passes the voice calls on to the Class 5 switch using the BellCore GR-303 protocol.

About Promatory Communications

Promatory Communications, Inc., is developing the next-generation broadband access switching platforms that address the service provider's revenue-generation and cost-management requirements both today and in the future. Promatory is establishing a new standard for access-switching technology with unprecedented levels of performance, intelligent features and greatly enhanced service capabilities.

Promatory products are available via distributors and partners and target a wide range of network service providers. Promatory is a venture-backed start-up based in Fremont, Calif., and the company is a principal member of the ADSL Forum.

About TollBridge Technologies

Founded in March 1998 and located in Sunnyvale, Calif., TollBridge Technologies is the leading developer of IP-based multiline voice solutions targeted at Competitive Local Exchange Carriers (CLECs). The company's solutions change the economics of delivering voice services to small business customers by allowing voice CLECs that own Class 5 switches to use broadband access technologies, such as DSL, to bypass the incumbent local exchange carrier (ILEC) and deliver toll-quality voice and integrated data services.

For more information, call 408/585-2145.

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