Ericsson MINI-LINK TN R3 ETSI, Technical Description

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MINI-LINK TN R3 ETSI
3.2.3 AMM 20p
The AMM 20p is suitable for large-sized hub sites, for example at the
intersection between the optical network and the microwave network. It has
20 full-height slots, one housing an NPU1 B and two half-height slots housing
one or two PFU1.
The remaining slots can be equipped with MMU, LTU, ETU, AAU and SMU.
Protected pairs, require two MMUs in a protected (1+1) Radio Terminal, and
are positioned in adjacent slots starting with an even slot number.
A cable shelf is fitted directly underneath the AMM to enable neat handling of
cables connected to the fronts of the plug-in units.
An FAU1 is fitted on top of the AMM unless forced air-cooling is provided. An
air guide plate is fitted right above the FAU1.
AMM 20p can be fitted in a standard 19" or metric rack. The AMM with FAU1,
cable shelf and air guide plate has a total height of 10U.
INFORMA
TION
PFU1
MMU2 4-34
MMU2 B 4-34
MMU2 B 4-34
LTU 16x2
LT
U
155e/o
NPU 8x2
-48V
Power A
-48V
FAN UNIT
Power B
Alarm B
Alarm A
Fault Power
PFU1
FAU1
Air Guide Plate
Cable Shelf
7861
NPU1 B
NPU1 B
Figure 19 AMM 20p
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4/1555-CSH 109 32/1-V1 Uen B 2007-09-14