Portable telephone user profiles
Portable, high performance messaging system
Position-sensitive photodetector and light transmissive tablet a
Power and telecommunications access vending machine
Power and telecommunications access vending machine
Power and telecommunications access vending machine
Power and telecommunications access vending machine
Power source system for data terminal equipment
Power transfer apparatus for use by network devices...
Power transfer apparatus for use by network devices...
Power-down modem
Pre-connection telephony data synchronization
Preliminary communication identification
Presence based DTMF signaling enablement of voice...
Printer-option system for exchanging data between a terminal and
Priority line switching system
Private automatic business exchange
Private branch exchange
Private branch exchange
Process for data communications and a data communications system