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P31003-H3550-S403-4-7620, 02/05
HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual
3-317
Boards for HiPath 3000
Options
3.4 Options
3.4.1 ALUM4
Introduction
In the event that HiPath 3550 or HiPath 3350 experience a voltage drop, voltage dip or unre-
coverable system errors, a trunk failure transfer (ALUM) is activated (MSI only).
The module implements a power failure transfer for four analog telephones. The only kind of
telephone that can be used is an analog telephone. The signaling method of the connected
telephones should be the same as that on the trunk line, otherwise signaling will not be possi-
ble.
When the system is deactivated or if an error occurs, the trunk lines are connected directly to
the telephones. When normal operation is resumed, the transfer represented in the figure be-
low takes place.
ALUM4 module function
Figure 3-135 ALUM4 - Function
X3
X4
1
16
To analog trunk board
To central control or
analog station board
Pins 1-8
Pins 9-16
From analog trunks
To analog stations
X6 KX-X relay interface
System
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