Panasonic KX-NCP500 Network Communication PlatformMessaging solution using optional KX TVM50 and TVM200 voice processing sytems. The Panasonic VoIP Gateway card will allow you to network multiple sites to share 1 voicemail through the Centralize Voicemail Feature, and allow one receptionist to answer all calls, transfer them to the appropriate site and see whether or not a person is on the phone (network DSS buttons).. Expandable up to 172 extensions and 128 CO's. The NCP500 business telephone system