PBX integrity arrangement for maintaining the functional integri
Personal communicator telephone system
Personal-servicing communication system
Personalized telephone for automatic access to operator services
Phone screen security system
Preemptive telecommunication interface for computer systems
Premised based 3-way call detection device
Private branch exchange
Real-time communications fraud monitoring system
Remote access telephone control system
Remotely accessing special services in telephone exchange
Restricted access telephones for logical telephone networks
Secure programmable telecommunication timer
Security system for terminating fraudulent telephone calls
System and method for bringing an in-line device on-line and...
System and method for call redirect detection and treatment
System and method for call redirect detection and treatment
System and method for control of communications connections...
System and method for control of communications connections...
System and method for controlling telephone use