Identification of calling devices dialing a universal number...
Idle detection for answer supervision
Implementation of charging in a telecommunications system
IMS gateway systems and methods for online charging in IMS...
Inhibiting completion of defrauding calls
Instant calling card provisioning system
Integrated revenue domain for telecommunication networks
Intelligent call connection service
Intelligent configuration server
Intelligent configuration server
Intelligent configuration server for PBX
Intelligent network having service control node and service swit
Intelligent networked, automated telephone calling card...
Intelligent queuing of transaction records
Intelligent-networked telecommunication system which...
Interactive and information data services telephone billing syst
Interactive and information data services telephone billing syst
Interactive handling of disputes
Interactive telephone operator terminal
Interactive voice personal and live connection telephone...