Technical Description
3.2.1.2 Cooling
AMM 2p B can be used with or without forced air-cooling, depending on the
configuration. Forced air-cooling is provided by FAU4, placed vertically inside
the subrack. FAU4 holds three internal fans.
If the indoor location has other fan units, which provide sufficient cooling
through the subrack, the FAU4 can be omitted. However, air filters should be
present in the cabinet door.
Complete rules for cooling are available in MINI-LINK TN ETSI Product
Specification.
Air in
Air out
9715
02
03
02
03
MMU2 E 155
NPU3
Figure 9 Cooling airflow in AMM 2p B
The air enters at the right hand side of the subrack and exits at the left hand
side of the subrack.
3.2.2 AMM 6p C/D
AMM 6p C/D is suitable for medium-sized hub sites or prioritized small-sites
with 1+1 protection.
AMM 6p C or D have four (D) or five (C) full-height horizontal slots, four (D) or
two (C) half-height horizontal slots and two half-height vertical slots. They
house one or two NPU3/NPU3 B, one or two PFU3 B and one FAU2, see
Figure 10 on page 13 and Figure 11 on page 13.
The remaining slots in AMM 6p C/D can be equipped with MMU, LTU, SAU,
AAU, SXU, SMU or ETU. Protected pairs, for example two MMUs in a protected
(1+1) Radio Terminal, are positioned in adjacent slots starting with an even
slot number.
AMM 6p C/D can be fitted in a standard 19" or metric rack or on a wall using a
dedicated mounting set. The height of AMM 6p C/D is 3U.
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12/221 02-CSH 109 32/1-V1 Uen A 2008-03-14
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