NEWPORT BEACH, Calif.--Conexant Systems Inc. here has introduced a reference design for a complete subscriber modem that can support all major worldwide cable-modem standards.
Conexant's CN9420CM contains the CN9414 single-chip cable modem, which features a programmable Media Access Control (MAC) layer through which manufacturers can upgrade to new feature sets or industry standards. The reference design also includes a comprehensive suite of driver, application and operating system code, as well as key application software above the TCP/IP stack for registration, authentication, and software downloading.
Rounding out the design is the ready-to-manufacture cable-modem board, plus all of the schematics, board lay-out files, documentation and input/output port cables for a complete subscriber cable-modem product.
Conexant claimed this is the first complete cable modem reference design from a single supplier. Manufacturers add their own box and branding, and can upgrade their platforms through software to customize feature sets, support new standards or migrate to future capabilities such as Internet Protocol (IP) telephony and home networking.
In addition to the single-chip CN9414, Conexant's reference design incorporates all of the software required to meet Data Over Cable Interface Specification (DOCSIS) 1.0/1.1 requirements established by Cable Television Laboratories Inc. Conexant supplies all of the MAC services software and the majority of higher-layer services software, including support for a complete TCP/IP stack, plus Simple Network Management Protocol (SNMP) software and other network management application layers above the TCP/IP software stack.
"Until now, cable-modem manufacturers either had to develop their own application software, or use software from multiple other sources to create a total solution," said John Graham, vice president of marketing for Conexant's Digital Infotainment Division. mConexant's CN9420CM is available immediately.