Chapter 1 - System Description
WILINK I MODULAR BASE STATION SYSTEM MANUAL
8
Table 1-4: PSU Requirements, Configurations with one NPU
(excluding PSU redundancy)
Number of AUs
Minimum Required Number of PSUs
1 - 2
1
3 - 6
2
Table 1-5 displays the number of PSU modules (excluding redundant units)
required for various Base Station configurations with NPU redundancy (two
NPUs, not supported in current version):
Table 1-5: PSU Requirements, Configurations with two NPUs
(excluding PSU redundancy)
Number of AUs
Minimum Required Number of PSUs
1 - 5
2
6
3
1.2.6.1
Air Ventilation Unit (AVU)
The 2U high AVU includes a 1U high integral chamber for inlet airflow and a 1U
high fan tray with an internal alarm module. To support high availability Base
Station, the fan tray includes 10 brush-less fans, where 9 fans are sufficient for
cooling a fully loaded chassis. A failure in any of the fans is indicated by both the
front panel LEDs and a trap that is sent to the management system. To further
support high availability, the chassis may operate with the hot-swappable fan
tray extracted from it for a period of time sufficient for replacing it (up 10
minutes).