RAD Data Communications completes interoperability testing with Cisco to offer TDM circuits over metro IP networks

RAD Data Communications today announced the completion of interoperability testing of RAD's TDMoIP (Time Division Multiplexing over IP) technology and Cisco's Spatial Reuse Protocol (SRP). SRP is the basis for Cisco's Dynamic Packet Transport (DPT) technology used to IP-optimize optical transport for metro networks.

The combination of RAD's and Cisco's technologies offers service providers a solution for traditional voice and leased line services over simple, cost-effective and scalable Metro IP network infrastructures. According to the companies, the low latency and transparent nature of TDMoIP gateways and the SONET-like restoration (under 50 milliseconds) attributes of
DPT ensures PSTN-quality circuits for voice, data and video, irrespective of protocols and signaling.

Powering Cisco's Metro IP systems, DPT utilizes two counter-rotating fiber rings that maximize the bandwidth available for data packet transport and by its design, facilitates data taking the shortest path to its destination. Currently over 190 service provider customers worldwide are utilizing Cisco DPT products, claims the company, and over 14,000 Cisco DPT ports have been shipped. DPT is based on SRP, a Cisco-developed MAC-layer protocol for ring-based packet internetworking. Cisco has submitted SRP to the IEEE 802.17 Resilient Packet Ring (RPR) Working Group for consideration as the basis for the industry standard.

RAD's IPmux line of TDMoIP Gateways enable the transport of TDM-based T1/E1, T3/E3, analog voice and ISDN BRI services over IP and Ethernet Networks. Benefits for the enterprise include investment protection in PBX and TDM equipment with a simple, inexpensive migration strategy to IP--without compromising current telephony features and without disrupting business operations, claim company representatives. For service providers, this enables the capture of new service revenues via delivery of leased line services over Ethernet infrastructures.

For more information about RAD Data Communications (Mahwah, NJ), visit the company's Web site at www.rad.com.