DETEWE OpenCom 130, User Manual

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Installation Power Failure
51
3.10.7 PCM Port
The PCM port is used cascade two communications systems together (see PBX Cas-
cading starting on page 122).
3.11 Power Failure
In the event of a power failure, all the contents in the memory (program and user
data) are saved without change. The internal clock continues to run for 24 hours. If
the power failure lasts longer than 24 hours, the time and date are reset to the
factory setting when power is switched on again. When the first external outgoing
call is made, the time and date are set to the current value as given by the
exchange.
On the multi-terminal access, the OpenCom 130/150 include an emergency
service. In the event of a power failure, the external S
0
1 port is switched over to the
S
0
2 port so that you can still use a connected telephone to make a call.
Emergency operation on a system access is not possible.
3.12 Connectible Devices
The OpenCom 100 ports already offer a large number of possibilities for con-
necting devices. By installing additional interface cards (in an OpenCom 130/150)
the number of ports can be increased as required.
One of the many possible configurations is shown in the following diagram.