Dear Treggers, I would like to know whether there are PBXs that deliver caller ID signals over their POTS extensions. If so, does the signaling method conform to the standard used for caller ID transmission over the PSTN of the country concerned? In that case, is polarity reversal ever used to signify the impending transmission of caller ID signals, as appears to be the case for (at least part of) the British PSTN and/or CATV-based telephone networks?
Clearly caller ID on call waiting can be and is delivered to PBX extensions, because the PBX behaves transparently to these signals, which are delivered in the off-hook state, and which are restricted to the voice band (i.e., requiring no on-hook detection and not being associated with any ringing signals, or polarity reversal, etc.). However, my question addresses the "plain old" caller ID function that tells you who's calling before you lift the receiver. Regards, David Drori Novarex Technological Enterprises Ltd., POB 2833, Jerusalem 91028, Israel. Tel: +972 2 586 4546 Fax: +972 2 586 5890 Mobile: +972 50 678686 E-mail: [email protected]
