ADC HRM-238 List 2, User Manual

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November 18, 2005 Chapter 1: Overview
LTPH-UM-1315-01 1-5
Recommended Network Setup for DDM+ Type Shelves
The configuration shown in Figure 1-5 is the recommended setup for DDM+ type mechanics shelves. Up to two
DDM+ type shelves can be managed with one HRM-238 shelf. Position the HRM-238 shelf below the DDM+ type
shelves. This limits the distance for the wire leads between the connectors for the management units and the line
units they manage.
Figure 1-5 shows the HRM-238 shelf from the rear view with the A-side connectors on the right
and the B-side connectors on the left. The leads from the HRM-238 shelf connector attach to the Network
Management Agent (NMA) pins on the rear of the DDM+ type mechanics shelves for each line unit managed. The
NMA pin on DDM+ type chassis is
pin 104 .
Figure 1-5. Recommended Network Setup for DDM+ Type Shelves
DDM+type shelf
HRM Shelf
-48V A
-48V A
-48V B
-48V B
Network B Network A
TB1
CO -48V
Supply
H0544-D
NMA 1 to 28 B
NMA 1 to 28 A
NMA 1 to 28 B
(pin 104 of
each slot)
NMA 1 to 28 A
(pin 104 of
each slot)
DDM+type shelf