If I have a PBX, Asterisk, in my office, and in my office I have a Cisco VoIP phone that my company put in, can I remove the phone and connect my PBX to that incoming line and create a "subnet" of individual telephone services? Maybe I could reconnect the phone to the pbx in my office? several other phones?
closed as off topic by Sathya♦ Feb 3 '11 at 9:23
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You will have to link the two PBX's. You will not be able to just plug in another PBX and have it work. You will also need a switch for the other phones and power adapters if the switch isn't POE.