Chapter 8: Downstream Cable Access Modules (DCAMs)
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
229
CAM Sparing PIC LED Status
The two types of CAM PICs are equipped with a sparing LED at the bottom of the faceplate. Under normal conditions all
sparing LEDs are off. When a CAM in a sparing group fails, traffic is transferred to its sparing group leader. In this case, the
sparing LEDs of the failed CAM PIC and of the sparing group leader CAM PIC are on.
Note: For sparing to work properly, there must be 16D CAM PICs in all the rear slots of the 16D CAM sparing group even if
one or more front slots of the group are not equipped with CAMs. If, for example, CAM 15 is sparing for the 16D CAMs in
slots 9-14, and front slot 11 is not equipped with a CAM, you must still have a normal 16D PIC in rear slot 11. If slot 11 is
not equipped with a PIC, then the traffic carried by the CAM in slot 9 or 10 cannot transfer to the sparing group leader in
case of a failover because it has no path through the backplane.
XD Cable Access Module (XD CAM)
The XD CAM provides an upgrade path to convert an existing 16D CAM module into an XD CAM supports 32 Annex A or B
DOCSIS 3.0-capable downstreams (DSs).
The model numbers for the XD CAM are:
CAM-20032W (Classic XD CAM)
CAM-40032W (Optimized XD CAM)
The Downstream CAM hardware version shown in the CMTS CLI and SNMP is dependent on whether the CAM is Optimized
or Classic, 16D or XD. The following table lists the hardware version shown in the CLI and SNMP along with the minimum
software for operation for each of the Downstream CAMs.
Table 26.
Downstream CAM Hardware Versions
Product
HW Version Shown
in CLI/SNMP
Minimum Software
for Operation
Optimized 16D
CAM
CAM-40016W
Release 7.4
Optimized XD CAM
CAM-40032W
Release 7.4