Ericsson MINI-LINK TN R3 ETSI Technical Description page 19

Redundant Power
Figure 12
3.2.1.2 Cooling
AMM 2p and 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 AMM. FAU4 holds three internal fans.
If the indoor location has other fan units, which provide sufficient cooling
through the AMM, 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 and the Product Catalog.
Figure 13
The air enters at the right hand side of the AMM and exits at the left hand
side of the AMM.
3.2.2 AMM 6p B/C/D
AMM 6p B/C/D is suitable for medium-sized hub sites or prioritized small-sites
with 1+1 protection.
AMM 6p B has six full-height horizontal slots and two half-height vertical slots.
It houses one NPU1 B, one or two PFU3 and one FAU2, see Figure 14 on
page 14.
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, one or two PFU3 B and one FAU2, see Figure 15 on
page 14 and Figure 16 on page 14.
4/1555-CSH 109 32/1-V1 Uen B 2007-09-14
_
+
Supply
–48 V DC or
_
+24 V DC
+
Power supply for AMM 2p B
Air out
Cooling airflow in AMM 2p B
NPU3
Basic Node
9958
Air in
9715
13