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Copper Mountain Optimizes Voice Over DSL

Digital Subscriber Line equipment developer Copper Mountain Networks Inc. Tuesday introduced an innovative technology designed to improve Voice-over Internet Protocol efficiency.

Dubbed Adaptive Fragmentation, Copper Mountain's concentrators reduce jitter and latency VoIP at the point of Symmetric and ISDN DSL customer premise equipment (CPE).

By minimizing the overhead in DSL networks, carriers using Adaptive Fragmentation increase the number of voice and data services that can be provisioned over each link, while retaining high bandwidth efficiency and ensuring consistent toll-quality voice services.

Jitter is inherent to VoIP because Asynchronous Transfer Mode (ATM) switches naturally segment data frames into short, fixed-length cells regardless of the voice or data traffic mix. Copper Mountain's Adaptive Fragmentation allows greater bandwidth efficiency than non-adaptive frame fragmentation or ATM systems because it does not break-up the packets.

It's smart technology because Copper Mountain Networks and its CopperCompatible CPE partnership program performs fragmentation only when voice traffic is present, and only to the extent needed to meet voice delay tolerances.

Rick Gilbert, Copper Mountain president and chief executive officer said the company is continually developing innovations that make DSL networks more efficiently.

"Better voice quality, reduced overhead, and more efficient voice and data service translate into competitive advantage and greater profits for our carrier customers," Gilbert said.

Scott Bradner, Harvard University senior technical consultant, said Copper Mountain's VoIP optimization is a big advancement toward attaining toll-quality telephony services.

"This is a clever means of optimizing the tradeoffs between minimizing jitter, latency, and overhead when providing packet-based voice service," Bradner said. "Automatically fragmenting non-real-time data when real-time data is present optimizes the best of both worlds."