OVERVIEW
The HiGain® HRM-238 List 1 is a two-slot HiGain Retrofit Management (HRM) shelf. This shelf fits into either a 19- or 23-inch Central Office (CO) equipment rack. It accommodates up to two HiGain management units (HMU-319s). It is used in conjunction with 220-type, unmanaged 3190 type, and DDM+ type mechanic shelves to manage HiGain line units.
The HRM-238 shelf, with two management units installed, provides network management capabilities for a maximum of 56 HiGain line units (one 3190 or DDM+ or two 220 shelves). Each management unit in the HRM-238 shelf can manage up to 28 line units.
The HMU-319 management unit installs horizontally into the 4 ¾-inch slots labeled A or B on the HRM-238 shelf (Figure 1). Each management unit connects to the shelf backplane through a 96-pin DIN connector.
96-pin DIN | 96-pin DIN |
connector (J2) | connector (J4) |
Figure 1. HRM-238 List 1 (front view)
FEATURES
Standard features include:
•50-pin Amp-type connectors for connection between the management units in the HRM-238 shelf and previously unmanaged HiGain line units in 220, 3190, or DDM+ mechanics shelves.
•DB-25 connectors for connection to a computer, terminal, or modem
•British Naval Connector (BNC) for connection to a Local Area Network (LAN) or to a HMU-319 multi-shelf connection
•screw-type terminals for -48 Vdc power connection and grounding
•23 wire-wrap pins to monitor alarm relay activity
HRM-238 List 1 | July 21, 2004 | 1 |
