Call routing to wireless roamers in mobile telecommunication sys

Call routing using direct in-dialing numbers in place of...

Call set-up control with automatic recall if busy subscriber

Call set-up for fixed wireless communications system

Call set-up in mobile communications system

Call set-up method in radio communication system

Call set-up on 800 MHz analog voice channel from 1900 MHZ digita

Call set-up process

Call state control function (CSCF) call processing

Call system

Call transfer for an integrated packet and wireless service...

Call transfer for an integrated wireline and wireless...

Call triggering to one or more service nodes upon receipt of...

Call-handling for an off-premises, telecommunications...

Call-setup method in a digital cellular radio communication syst

Called party availability announcement in a radio telecommunicat

Caller line identification for GSM and wireless...

Calling non-PSTN numbers via a mobile terminal

Calling non-PSTN numbers via a mobile terminal

Calling number identification for a radiotelephone operating...