ADC HRM-238 L1 Manuel D’Utilisation

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 
(

). Each management unit connects to the shelf backplane through a 96-pin DIN connector.

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

A

B

96-pin DIN

connector (J2)

96-pin DIN

connector (J4)

H0543-A