Interactive telephone operator terminal
Interactive value-added telecommunications system and method
Interactive voice personal and live connection telephone...
Interconnect traffic analysis
Interconnect traffic tracking
Interfacing system for an international-type pay-telephone
International origination to domestic termination call blocking
Internet assisted return call
Internet telephone system, access point apparatus, and...
Internet telephony call pricing center
Internet user finder
Internet-based message delivery with PSTN billing
Internet-based message delivery with PSTN billing
Internet-based message delivery with PSTN billing
Internet-based message delivery with PSTN billing
Investigation and reporting of inmate security threats
ISN call interrupt
Least cost rooting system
Least cost routing device for separate connection into phone lin
Least cost routing system