Call control method between a packet network and PSTNs in...
Call control model for a packet-based intelligent...
Call control network, access control server and call control...
Call control system for a subscriber transmission device
Call control using a layered call model
Call correlation tag for ATM messages
Call data and hardware cache for a dial-up access concentrator
Call establishment for multimedia call
Call establishment method for dial-up internet telephony...
Call flow system and method for use in a legacy...
Call flow system and method use in VoIP telecommunication...
Call forwarding in an IP multimedia subsystem (IMS)
Call forwarding method
Call hold with reminder and information push
Call identification mechanism for multi-protocol telephones
Call management messaging system for integrating the...
Call management via television
Call notification feature for a telephone line connected to the
Call processing architecture
Call processing arrangement for ATM switches