User's Manual

Table Of Contents
Unit Descriptions - RF Path CMA-331-AEN Page 35
Draft
Module Description
PSM-DC: 48 V DC
Note: If two are installed, both must be powered on. See
sections
2.1.1.7. (PSM-AC) and 2.1.1.8 (PSM-DC).
Table 2-1. HEU Modules
2.1.1.1 HCM (Headend Control Module)
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.
Port Description
INTERNAL (TO ACM)
Four RJ45, 100Mb Ethernet ports - used for management of connected OIU
systems (and/or HEU Slaves).
LAN RJ-45, 1Gb Ethernet port - connects to the corporate LAN for remote management
LOCAL RJ-45, 1Gb Ethernet port - local configuration and management
CONSOLE RJ-45, serial port - local configuration for service personnel
SD Card Slot
Supports uSD cards up to 32 GB (used for saving and importing configuration files
between different HEU chassis)
Table 2-2. HCM Ports