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
Reverse charging system, reverse-charging service control...
Reverse charging system, reverse-charging service control...
Route information message for delivery of prepaid flexible...