NEWPORT BEACH, Calif. -- Conexant Systems Inc. here has rolled out two chip sets to allow manufacturers of Internet protocol routers to support higher traffic volume over their equipment.
The chip sets cut component count to reduce board space requirements by 50% and per-port framer costs by up to 20%, according to Conexant. Both products include a broadband access multiplexer and a high-level data-link controller device using Conexant's proprietary 1,024-channel multichannel synchronous communications controller.
The chip sets join the company's recently introduced OptiPHY-M622 and OptiPHY-M155 framer/multiplexer devices for synchronous optical network (Sonet) and synchronous digital hierarchy (SDH) equipment. Combined, the chipset family integrates low-speed and high-speed circuitry, enabling significantly more Internet and other data traffic to be processed by SONET/SDH-based equipment using fewer discrete components, according to Conexant.
"Internet traffic in North America reached 350,000 terabytes per month in 1999, and is expected to reach more than 15 million terabytes by 2003," said Brian VanSteen, analyst with market research firm RHK Inc. "New generations of network elements traditionally offer four times the capacity of previous generations, which puts pressure on silicon vendors to provide higher-density solutions."
For applications where OC-12 (622 megabits per second) or synchronous transfer module (STM)-4 traffic must be channelized down to DS1/E1 for IP traffic configuration, Conexant offers four highly integrated BAM devices, two HDLC devices, and a single OptiPHY-M622 Sonet/SDH framer/multiplexer.
The company said the package consolidates all IP traffic mapping,multiplexing, demultiplexing, and framing functions into one high-density chip set and reduces the required chip count from 17 to seven. For an OC-3 (155 Mbits/sec.) or STM-1 application, only three devices are required, including one OptiPHY-M155, one BAM, and one HDLC device.
Designed predominately for IP router applications, the complete solution supports the U.S. and European Sonet/SDH and plesiochronous digital hierarchy (PDH) standards, enabling manufacturers to develop a single software-configurable design that can be used in both U.S. and international markets. The seven-device chipset occupies a 13-by-7-cm area on the IP router board.
"This is the industry's highest-density solution for transmission of IP traffic over OC-12/STM-4, channelized down to DS1/E1 circuits," said Marek Tlalka, Sonet/SDH product line manager for Conexant's Network Access Division. "Conexant continues to expand its network access portfolio to address some of the most pivotal challenges of today's aggressive Internet infrastructure upgrade."
The CX29503 BAM device is packaged in a 31-sq.-mm super ball grid
array (SBGA) package and is $790. The companion CX28500 controller is packaged in a 35-sq.-mm BGA and is $275. The CX29600 and CX29610 framer/multiplexers are packaged in 416-pin 27-sq.-mm SBGAs, and are $70 and $225, respectively. All prices are in volumes of 10,000.