Jetstream, Promatory Partner to Enable Voice Over DSL

Promatory Communications Inc. (Fremont, CA) and Jetstream Communications (Los Gatos, CA) have partnered to provide toll-quality voice-over-digital subscriber line (DSL) solutions to service providers. The companies will participate in joint sales and marketing activities that began this week with live demonstrations of both products in each company's booth at Supercomm '99 (June 8-10, at the Georgia World Congress Center, Atlanta). The companies plan to offer an end-to-end solution to service providers interested in providing voice over DSL (VoDSL). Extensive interoperability testing for their VoDSL products has been successful, and the joint system is available for immediate deployment by service providers.

The VoDSL offering will include voice-capable DSL-based customer-premise equipment coupled with Promatory's IMAS and Jetstream's CPX-1000 voice gateway for the service-provider central office. Integrated access devices (IADs) at customer premises multiplex voice and data into asynchronous transfer mode (ATM) virtual circuits (VCs) for transport over DSL. Each VC can be assigned quality of service (QoS) parameters that meet the performance requirements of the application being supported.

At the central office, Promatory's IMAS performs the ATM switching, QoS functions and weighted-fair queuing ensure toll-quality voice and optimum bandwidth utilization. Voice circuits are consolidated onto DS-3 (45 Mbps) or OC-3 (155 Mbps) backbones to voice gateway locations where the Jetstream CPX-1000 performs the ATM-to-GR-303 gateway function to interface with existing Class 5 public switched telephone network voice switches.