Switching PBX output line and telco direct line - Electronic Circuits Projects Diagrams Free

wyxer · 1st March 2009, 05:24 PM

Hey guys, how about this?

An analog phone to be connected, or to be driven alternately by two sources.
One, from the output of a PBX system and the second, directly from the telco phone line.

The reason for this is for the telephone set to receive calls during PBX failure, when the PBX system has been shutdown for maintenance, or when there's a total power outage (brownout).

I already thought of using a mechanical switch that can be manually shift to either line but having it automatically shifted (electronically) will be much appropriate for our location.

Thank you.

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1st March 2009, 05:24 PM	#1
wyxer	Switching PBX output line and telco direct line Hey guys, how about this? An analog phone to be connected, or to be driven alternately by two sources. One, from the output of a PBX system and the second, directly from the telco phone line. The reason for this is for the telephone set to receive calls during PBX failure, when the PBX system has been shutdown for maintenance, or when there's a total power outage (brownout). I already thought of using a mechanical switch that can be manually shift to either line but having it automatically shifted (electronically) will be much appropriate for our location. Thank you.