Broadcom introduced a DOCSIS/EUR-DOCSIS 2.0-based CMTS chipset designed to enable 40 Mbps symmetrical interactive services over cable networks. The company also announced three major design wins for CMTS DOCSIS 2.0 equipment based on the new chipset: ADC Telecom, ARRIS and Cisco Systems.
Broadcom’s new CMTS chipset consists of a QAMLink media access controller (MAC), a QAMLink Dual A-TDMA/S-CDMA burst receiver, and a QAMLink modulator. The MAC chip, which can process up to 400,000 packets per second in the aggregate over all upstream and downstream channels, has both a PCI and Gigabit Ethernet interface connection for traditional CMTS and deep fiber architectures.
Broadcom said its TurboQAM technology enables upstream line rates of up to 40 Mbps and downstream operation up to 100 Mbps. The chipset also incorporates support for Broadcom’s unique packet-acceleration software, Propane, which enhances the upstream throughput of the cable network.
http://www.broadcom.com
- In December 2002, the International Telecommunications Union — Telecommunication Sector (ITU-T) approved DOCSIS 2.0 as an international standard. ITU Recommendation J.122 (DOCSIS 2.0) primarily provides greater upstream bandwidth from the user to the network. The specification includes two technologies to achieve that goal: an advanced form of time-division multiple access (A-TDMA), and synchronous code-division multiple access (S-CDMA). Recommendation J.122 is backwards compatible with earlier versions of DOCSIS. It also supports the QoS capabilities in DOCSIS 1.1, enabling the new standard to be used as a foundation for IPCablecom telephony services.
In December 2002, CableLabs awarded the first wave of certifications for DOCSIS 2.0 compliance to five companies. DOCSIS 2.0 modems from Motorola, Scientific-Atlanta, Terayon, Texas Instruments and Xrosstech were certified and a cable modem termination system (CMTS) from Terayon received DOCSIS 2.0 qualification.
