I've been asked if there was a way to activate all speakerphones (3903, 3904)in the case of an emergency, barge in etc. Kind of a poor man's paging system.
no the best you can do is a voice call to a single station. pbx's in general don't do area page, simply due to power supply requirements.. background music type speakers, valcom etc. can be interfaced through paging trunks.. you can wire a loud ringer to do a clear building alarm..
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