Chapter 9: Upstream Cable Access Modules (UCAMs)
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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Overview
This section provides guidelines and procedures specific to the 12U and 24U Cable Access Module (UCAMs).
It also provides basic examples of slot equipage and CAM configuration, as well as examples of procedures for migrating to
denser configurations.
CAMs can be configured in slots 0 through 15, but it is recommended to use the lower-numbered slots for 12U or 24U
CAMs and use higher-numbered slots for the 16D or XD CAMs. Slot 16 is not used.
Guidelines
The following list of items will not be supported in Release 8.0:
2Dx12U CAM
QAM 128
Trellis Code Modulation (TCM)
Multiple logical channels
Channel widths of 200,000, 400,000, and 800,000 Hz.
Note: The terms upstream (US) port, upstream (US) channel, and upstream (US) receiver may be used synonymously in
this document.
12U Cable Access Module (12U CAM)
The 12U CAM provides full DOCSIS 2.0 functionality and supports the following:
Eight upstream physical connectors (numbered 0-7)
Up to twelve 02.56-30.72 Mbps physical upstream channels (numbered 0-11).
The supported channel types are: SCDMA, TDMA, ATDMA, and TDMA & ATDMA.
Range of upstream frequencies configurable for North America, Japan, or Europe:
5-42 MHz (DOCSIS)
5-55 MHz (Japan)