Internet facilitated emergency and general paging system
Internet information displaying apparatus
Internet on hold
Internet protocol telephone system
Internet protocol telephony for a mobile station on a packet...
Internet service provider call redirection
Internet telecommunications system
Internet telephony call routing engine
Internetwork call forwarding with subscriber identity
Interoffice callback arrangement
Interoperability of home networking devices in a 2 line...
Interphone system with security function
Interpretation of markup data for mobile devices
Interrogation device
Interrogatory telemetering system and apparatus
Interrupter for key telephone systems
Interswitch line circuit
Intraplant communication system
Intrinsically safe telephone
Intrinsically safe telephone