2.9 Power Failure Connections
2.9Power Failure Connections
2.9.1Power Failure Connections
When the power supply to the PBX fails, power failure transfer will switch from the current connection to the Power Failure Connections.
Power Failure Connections connect a specific extension and an outside (CO) line in the event of power failure as follows:
Outside (CO) line
Outside (CO) line
Outside (CO) line
Notes
•In the event of a power failure, system memory is protected by a
•The current connection automatically switches to the Power Failure Connection when the power supply stops.
•Proprietary telephones (PTs) cannot be used during a power failure. Therefore, we recommend connecting single line telephones (SLTs) in parallel with PTs to extension jacks 01, 09, and 17.
•As long as DC power is provided by the backup batteries, the PBX will remain fully operational and the connection will not switch to the Power Failure Connections.
Installation Manual
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