Communication service control apparatus
Communication services method and apparatus
Communication system architecture, apparatus and management...
Communication system control method
Communication system for detecting an unauthorized intruder term
Communication system utilizing information received during a sil
Communication terminal device, call-history memory method and ca
Communications network
Communications network
Communications protocol for least cost call routing system
Communications service billing based on bandwidth use
Communications system and method with call expenditure control
Communications system for a service provider
Compensating recipients of calls
Competitively bidding service centers
Compilation, analysis, and graphic representation of call data
Computer telephone system
Computer-controlled telecommunications system
Computer-controlled telecommunications system
Computerized system and method for displaying line usage...