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.
230
Product
HW Version Shown
in CLI/SNMP
Minimum Software
for Operation
Classic 16D CAM
CAM-20016W
Release 7.1
Classic XD CAM
CAM-20032W
Release 7.4 for XD operation
Release 7.1 for 16D operation
Note: The Optimized 16D and XD CAMs will not work in releases prior to Release 7.4. XD CAMs will work in releases prior
to 7.4 but will only configure as a 16D, and the hardware version will appear as a CAM-20016W.
Note: The C4 CMTS does not support both 16D CAMs and XD CAMs operating at the same time. The downstream CAMs in
the chassis should be either all 16D or all XD CAMs.
Types of Downstream CAMs
Classic Downstream CAM — This CAM is available today as a 16D CAM. Field software upgrades are available to convert
16D or Optimized 16D CAMs to XD CAMs.
Optimized Downstream CAM — This module has the same functionality and performance as the Classic Downstream
CAM. Software Release 7.4 or later is required for the Optimized DS CAM.
XD CAM — For both Annex A and Annex B operation, the XD CAM supports up to 32 downstream channels. It can also be
configured to operate as a 16D CAM.
Maximum number of downstreams per Annex:
Annex B
32 downstreams, 6 MHz wide, DOCSIS 3.0
Annex A
32 downstreams, 8 MHz wide, EuroDOCSIS 3.0
Note: Each XD CAM will operate in either Annex B or Annex A mode but a mixed annex mode within an XD CAM is not
supported.
Operational Considerations for the XD CAM
Operators using the XD CAM should be aware of the following: