Model #TP6AP Interphones 6-Button Intercom Phone (requires RF24A) The TP6AP and TP12AP are selective ring, common-talk interphones providing two-way and conference call communication, and all-station paging in systems of up to 6, or up to 12 stations, respectively. An electronic call tone alerts parties to a call. Communication is then free of controls, as with conventional telephones.Where necessary, an external speaker may be added to any station. An optional pager adapter (Model TB10A) provides an interface between the interphone paging system and an external paging amplifier (or amplified speaker) to permit all-station paging to remote areas without reducing system capacity. The adapter also may be used to add an additional one-way or one-way-with-talkback paging channel to the system. A single power supply (Model RF24A) is required for each installation. Read More   $127.44

Model #TP12AP Interphones 12-Button Intercom Phone (requires RF24A) The TP6AP and TP12AP are selective ring, common-talk interphones providing two-way and conference call communication, and all-station paging in systems of up to 6, or up to 12 stations, respectively. An electronic call tone alerts parties to a call. Communication is then free of controls, as with conventional telephones.Where necessary, an external speaker may be added to any station. An optional pager adapter (Model TB10A) provides an interface between the interphone paging system and an external paging amplifier (or amplified speaker) to permit all-station paging to remote areas without reducing system capacity. The adapter also may be used to add an additional one-way or one-way-with-talkback paging channel to the system. A single power supply (Model RF24A) is required for each installation. Read More   $135.54