Process for signalling cost information upon connection...
Process, exchange, charge computer, charge billing computer...
Processing of telecommunications call billing data
Professional services billing personal identification number
Providing called number characteristics to click-to-dial...
Providing effective advertising via synchronized telephone...
Public telephone system
Public telephone system using a prepaid card to enable communica
Radio communication system authenticating a personal station and
Rate modelling
Rate validation system and method
Rating communications and special communities
Real-time billing system for a call processing system
Real-time billing system for a call processing system
Real-time network for distributed telecommunication accounting s
Recyclable cellular telephone and method and apparatus for suppo
Recyclable cellular telephone and method and apparatus for suppo
Remote data access for operator assistance calls
Remotely selecting an economical communications transmission...
Repertory telephone dialer with remote billing capability