Alum Module - Siemens Hicom 100 E Service Manual

3.6.6

ALUM module

If the power supply fails or a serious system error occurs, a trunk failure transfer is activated
(analogue trunk only).
The module implements trunk failure transfer for four analogue terminals. Normal telephones
are the only terminals that can be used as transfer destinations. The signalling method of the
destination terminals must be the same as that of the trunk, otherwise dialling is not possible.
If the PBX is switched off or when a fault occurs, the trunks are connected directly to the termi-
nals. When normal operation resumes, the transfer shown in diagrammatic form below is effect-
ed. Calls in progress will be disconnected when the power is lost or restored.
from trunk
to
terminal
from trunk
to terminal
Figure 3-16 ALUM module interfaces
The X6 port can be accessed only when the module housing is open.
The cable connected as standard is split and connected to the TLA and SLAS mod-
ules.
A31003-K16-X001-3-7620, 07/99
Hicom 100 E Version 2.1, Service manual
1
X3
1
16
X6
8
1
X4
8
X3
Normal operation
System error
Normal operation
X4
Function expansions with options bus
ALUM module
Trunk subscriber module
16
Overview of modules
MB side
X1
X2
Module side
X6
1
3-27