Telecommunications network circuit usage measurement
Telecommunications network having number portability
Telecommunications network routing
Telecommunications network routing
Telecommunications service provisioning utilizing group...
Telecommunications system and method for automatic call processi
Telecommunications system and method providing generic...
Telecommunications system for minimizing fees paid to...
Telecommunications system with active database
Telephone billing method
Telephone billing system
Telephone billing with customer-defined budgeting
Telephone billing with customized billing information
Telephone billing with summary information
Telephone call billing system
Telephone call charge allocation arrangement
Telephone call dialing
Telephone call fee notifying system and telephone call fee notif
Telephone call monitoring method and apparatus
Telephone call monitoring, metering and selection device