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.
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configure slot <x> shutdown
2.
Shut down the cable-mac interface.
configure interface cable-mac <int> shutdown
3.
Change the annex:
configure interface cable-mac <int> cable annex <A | B>
Note: An improper configuration results in an error message and the annex change is aborted.
4.
Change the downstream center frequency if necessary.
configure interface cable-downstream <slot/port> cable frequency <freq>
At this time, a number of values will change and checks will occur. For example, the downstream and upstream
frequency spectrum is checked to insure that there is no overlap in the fiber nodes.
5.
Change interleavers for all channels in the cable-mac. Note that changing the interleaver on one channel on an RF-
connector changes it for all channels on that connector.
6.
Save your changes:
write memory
7.
Restore the cable-mac to service.
configure interface cable-mac <int> no shutdown
8.
Restore the CAM(s) to service:
configure slot <x> no shutdown
Where x represents the slot number of the CAM. The command must be performed for each provisioned CAM. The CAMs
reset and come back in service with the new annex setting.
9.
To display the annex setting use the following command:
show interface cable-mac
Channel Width
The channel width settings for each annex are unchanged for DOCSIS 3.0. The CMTS defaults to Annex B and 6 MHz, just as
it did in previous software releases.