Redundancy in a cable modem termination system

H - Electricity – 04 – B

Patent

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Details

H04B 1/74 (2006.01) H04L 1/22 (2006.01) H04L 12/28 (2006.01)

Patent

CA 2408177

A cable modem termination system (CMTS) for receiving signals from, and transmitting signals toward, a High-Frequency Coax plant includes multiple normally-active CMTSs each configured to receive and transmit modem-compatible signals, multiple interface modules coupled to the normally-active CMTSs and configured to convey data toward the HFC from the normally-active CMTSs and from the HFC toward the normally-active CMTSs, and a spare CMTS configured to receive and transmit modem-compatible signals, where at least two interface modules are coupled to each other in a daisy-chain fashion to couple at least a first of the interface modules to the spare CMTS via at least a second of the interface modules to which the first interface module is daisy-chain coupled.

L'invention concerne un système de terminaison pour modem câble (CMTS) destiné à recevoir des signaux d'une installation à câble coaxial haute fréquence, et à émettre des signaux vers celle-ci. Ledit système comprend plusieurs systèmes CMTS normalement actifs, tous configurés pour recevoir et émettre des signaux compatibles avec le modem, plusieurs modules d'interface couplés auxdits systèmes CMTS normalement actifs et configurés pour acheminer les données des systèmes CMTS normalement actifs au câble coaxial haute fréquence, et vice-versa, et un système CMTS de rechange configuré pour recevoir et émettre des signaux compatibles avec le modem. Le système selon l'invention est caractérisé en ce que deux des modules d'interface au moins sont couplés l'un à l'autre en chaîne bouclée, de manière à coupler un premier module d'interface au moins au système CMTS de rechange via un second module d'interface (couplé au premier module d'interface en chaîne bouclée).

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