XD Field Software Upgrade for deployed 16D CAMs via software license key
The Arris C4® and C4c™ 16 Downstream Cable Access Module (16D CAM) supports sixteen DOCSIS® or EuroDOCSIS™ 3.0 downstream channels. These channels are grouped onto four upconverters with four Annex A or Annex B channels per upconverter. The Physical Interface Card (PIC) of the 16D CAM is has four F-connectors with each F-connector connected to the output of one of the upconverters. Each downstream channel on the same upconverter/F-connector must have a unique center frequency, but the channels are not required to be contiguous. The downstream channels on a single F-connector can span up to 80MHz of spectrum, allowing an MSO flexibility in choosing DOCSIS downstream frequencies.
The 16D CAM supports DOCSIS 3.0 downstream channel bonding with variable size bonding groups. This allows for the aggregation of two or more DOCSIS channels to support ultra high bandwidths. For example, Release 7.4 supports up to eight bonded downstream channels. With Annex B channels, eight channel bonding provides a 320Mbps data stream to a subscriber‘s DOCSIS 3.0 cablemodem.
The C4 CMTS contains patented FlexCAM technology that provides fully integrated “hitless” RF sparing. This sparing includes support for multiple 16D CAM RF sparing groups, the size of which can vary from one to seven active 16D CAMs. If a failure occurs on a 16D CAM with “hitless” RF sparing, the spare 16D CAM automatically replaces the failed module so that all of the cable modems remain in service with minimal packet loss.