Aastra OpenCom 130 User Guide - Page 56
PCM Port, 3.11 Power Failure, PBX Cas, cading
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Installation Power Failure 3.10.7 PCM Port The PCM port is used cascade two communications systems together (see PBX Cascading starting on page 148). 3.11 Power Failure In the event of a power failure, all the contents in the memory (programme 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 include an emergency service. In the event of a power failure, the external S01 port is switched over to the S02 port so that you can still use a connected telephone to make a call. Emergency operation on a system access is not possible. 54