CORNING ONE - HCM (Headend Control Module)

Unit Descriptions - RF Path P/N 709C011801 Page 35
DRAFT
2.1.1 HEU (Headend Unit)
HEU hosts the following modules:
1. HCM- Headend Control Module; overall system management module (see section 2.1.1.1)
2. ACM – Auxiliary Control Module; provides interfaces for management of domestic modules via HCM; installed in HEUs’ in
configurations with more than one HEU (see section 2.1.1.2)
3. RIM - Radio Interface Module; RF source conditioner (see section 2.1.1.3)
Up to 12 RIMs can be hosted by the HEU
4. RIX - Radio Interface Expander; HEU to OIU interface module (see section 2.1.1.4).
Note: For configurations with one RIX an ETM is required for terminating the unused Expander slot.
5. PSM- Power Supply Module; AC or DC power supply (see section 2.1.1.5).
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 chassis (one
HCM per system installation). The HEU hosting the HCM module serves as the Main HEU (any additional HEU chassis is
installed with an ACM).
The HCM interfaces to the corporate LAN and to up to four ACM modules installed in any additional HEU and in OIU chassis
(see section
2.2). The HCM includes Local and LAN management ports and LED status indicators.
Figure 2-3. 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
LED Description
PWR
Steady Green - Power input detected by HCM
Off – No power is supplied to the unit