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. 250
5. SFP and XFP Ethernet Interfaces (page 214)
The first procedure is simply a precaution. The third and last procedures are the actual upgrades. The second and fourth
procedures listed above are used to create the scripts that you will need to reconfigure (provision) the XD CAMs or the
chassis after upgrading the downstream CAMs. Scripting the provisioning and configuration ahead of time minimizes
subscriber downtime by enabling additional downstreams through the upgrade of the 16D CAMs to XD CAMs.
Operational Concerns
Operators and users of the C4/C4c CMTS should be aware of the following:
Software Release 7.4 or later is required for this upgrade.
An XD license key for each 16D CAM to be upgraded is required to enable XD operation. This key is a text string and is
stored in non-volatile memory on the XD CAM itself; thus it migrates with the XD CAM.
The XD CAMs use the same active and spare Physical Interface Cards (PICs) as the 16D CAMs.
The hardware version of an upgraded Classic CAM will be shown in MIBs and in CLI output as CAM-20032W or as
CAM-40032W for Optimized XD CAMs. This is true whether the upgraded CAM is used as a 16 or 32D downstream
CAM.
If the CMTS is running with Software Release 7.3 or lower, it will support an XD CAM but will recognize and operate it
as a 16D CAM. This chassis will show XD CAMs as hardware version CAM-20016W—the same hardware version as a
16D CAM.
For hitless XD CAM sparing, the C4 CMTS supports a maximum of nine (9) XD CAMs per sparing group (eight active and
one spare).
A chassis running Software Rel. 8.1.5 can support 16D or XD CAMs. If XD CAMs are added to a chassis running Software
Rel. 7.4 or above and using 16D CAMs, they must be configured as 16D CAMs using the configure slot type command.
Note: If the operator attempts to use the saved configuration of the 16D on the XD CAM, then several of the commands in
the script will fail, because the 16D and XD CAMs do not have the same port-to-connector mapping.
Ordering CAMs
Use an ordering code provided by your ARRIS account representative. Each license key provided is stored on the XD CAM
and remains with it.
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