System and method of generating ring back tone

System and method of managing telephone calls within a voice...

System and method of providing a per-use, auto-generation,...

System and method of providing enhanced subscriber services in a

System and method of responding to an incoming call while...

System and method of triggering services for call control

System and method of triggering services for call control

System and method of using presence information to delay...

System and method protecting the identity of target...

System and method that provides specialized processing of...

System and method to automatically provide an electronic consume

System and method to facilitate team communication

System and method to identify and associate call legs in...

System and method to stop call looping

System and process for mass telephony conference call

System for communicating with external device registers via two-

System for coordinating calls between an adjunct device and a sw

System for customer configuration of call routing in a telecommu

System for deferred call answering in a telecommunications syste

System for determining whether to accept new supplementary servi