telecommuting through the use of cable modems. These modems are designed to achieve downstream transmission speeds of up to 43 megabits per second, or Mbps (North American standard), or 56 Mbps (international standard), and upstream transmission to the network at speeds of up to 30 Mbps. The speeds achieved by cable modems are nearly 1,000 times faster than the fastest analog telephone modems, which transmit downstream at up to 56 kilobits per second, or Kbps, and upstream at up to 28.8 Kbps. Cable modems typically connect to a user’s PC through a standard 10/100BASE-T card or Universal Serial Bus, also known as a USB, connection. A device called a termination system, or CMTS, located at a local cable operator’s network hub, communicates through television channels to cable modems in subscribers’ homes and controls access to cable modems on the network. The cable industry’s adoption of an open standard, the Data Over Cable Service Interface Specification, commonly known as DOCSIS˛, has made possible interoperability among various manufacturers’ cable modems and CMTS equipment used by different cable networks. The first specification, DOCSIS 1.0, was adopted in 1997 and enabled the cost-effective deployment of cable modems. In 1998 the DOCSIS 1.1 specification was announced. This specification enhanced DOCSIS 1.0 to include support for cable using VoIP technology, streaming video and managed data services. In 2002 DOCSIS 2.0 was approved. DOCSIS 2.0 adds support for higher upstream transmission speeds of up to 30 Mbps and more symmetric IP services, and provides extra capacity for cable telephony. The recently released DOCSIS 3.0 specification, which is currently under development, provides enhanced data rates and security, while maintaining backwards compatibility with prior standards. The high speeds of today’s cable modems can enable an entirely new generation of multimedia-rich content over the and allow cable operators to expand their traditional video product offerings to include data and telephone services. The adoption of cable modem services and the continued proliferation of homes with multiple PCs have also generated the need for residential networking. operators have recognized the opportunity to include this feature in the equipment they utilize for cable modem services through either home telephone line or solutions, and the cable industry has created a specification called CableHomeTM that defines how a home intranet interoperates with a cable operator’s Internet service. We offer integrated solutions for cable modems and cable modem termination systems. We currently have a leading market position in both equipment areas, with an extensive product offering for the high-speed, two-way transmission of voice, video and data services to residential customers. We offer a complete system-level solution that not only includes integrated circuits, but also reference design hardware and a full software suite to support our customers’ needs and accelerate their time to market. Cable Modem Solutions. All of our cable modem chips are built around our QAMLink˛ DOCSIS- compliant transceiver and media access controller, or MAC, technologies. These technologies enable downstream data rates up to 56 Mbps and upstream data rates up to 30 Mbps and are compliant with DOCSIS versions 1.0, 1.1 and 2.0. These devices provide a complete DOCSIS system solution in silicon, enabling to support constant bit rate services like VoIP and video streaming. Residential Broadband Gateway Solutions. The levels of integration and performance that we continue to achieve in our cable modem chips are reducing the cost and size of cable modems while providing consumers with easy to use features and seamless integration to other transmission media. As a result, cable modem functionality is evolving into a small silicon core that can be incorporated into other consumer devices for broader distribution of IP-based services throughout the home. Broadcom offers residential broadband gateway solutions that bring together a range of capabilities, including those for cable modems, digital set-top boxes, home networking, VoIP and Ethernet connectivity. These products allow cable operators worldwide to provide residential broadband gateways capable of delivering digital telephone service via the PacketCableTM specification, IP video, and cable modem Internet services, as well as data over in-home Ethernet or wireless networks. CMTS Solutions. We have a complete end-to-end DOCSIS 1.0, 1.1, 2.0 and 3.0 compliant cable modem semiconductor solution for both head-end and subscriber locations. Our CMTS chipset consists of downstream and upstream physical layer, or PHY, devices and a DOCSIS MAC. This cable modem termination system enables the exchange of information to and from the subscriber location, making it a key element in the delivery of broadband access over cable.

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