User's Manual

Table Of Contents
Unit Descriptions - RF Path
CMA-331-AEN
Page 37
Module
Description
the RF source; Up to 12 RIMs can be hosted by the HEU; See section
2.1.1.3.
FRM
Fiber remote module - performs the optic-to-RF conversion of the cellular services at the
remote end of the FMM-to-FRM link (FCM solution); interfaces to FMM via SM fiber and
Ethernet fiber (for 10 GbE transport)
RIX RF expander module; RIM to OIX interface module; See section 2.1.1.5.
ETM
Expander termination module; For configurations with one RIX an ETM is required for
terminating the unused Expander slot. See section
2.1.1.6.
PSM Power supply modules:
PSM-AC:100 - 240 V AC
PSM-DC: 48 V DC
Note: If two are installed, both must be powered on. See section
2.1.1.7.
Table 2-1. HEU Modules
2.1.1.1 HCM
Overall system management and control capabilities are performed via the HCM, which is installed in an HEU or IHU chassis
(one HCM per system installation). The headend unit hosting the HCM module serves as the Main headend unit (any additional
HEU/IHU chassis is installed with an ACM).
The HCM directly interfaces to the corporate LAN and to up to four ACM modules installed in additional HEU/IHU/OIU chassis
(see section
2.1.2). The HCM includes Local and LAN management ports and LED status indicators.
Figure 2-4. HCM Module
Table 2-2 and Table 2-3 provide a description of the HCM ports and LED status indicators.