PABX cordless telephone system
Pabx with voice mail device
Pacing of telephone calls for call origination management system
Packet telephony gateway for hearing impaired relay services
Partial voice message deletion
Password controlled switching system
PBX DID and E and M tie trunk integration adapter and method
PBX Intercept and caller interactive attendant bypass system
PBX switch incorporating methods and apparatus for...
PBX system communications device
PBX telephone call control system
PBX telephone call control system
PBX telephone call control system
Peer to peer voice over IP network with distributed call...
Person to person telephone services
Personal address updates using directory assistance data
Personal address updates using directory assistance data
Personal calendaring, schedules, and notification using...
Personal calendaring, schedules, and notification using...
Personal caller I. D.