System and method for communicating with and controlling...

System and method for invocation of a check of a...

System and method for managing telephony network resources

System and method for providing a busy signal to a communication

System and method for providing an enhanced audio quality...

System and method for providing competitive access telephone ser

System and method for providing telephony services to remote...

System and method for providing telephony services to remote...

System and method for providing telephony services to remote...

System and method for providing telephony services to remote...

System and method for redirecting control of in-band signaling

System and method for redirecting control of in-band signaling

System and method for redirecting control of in-band signaling

System and method for telephony call control

System and method for unifying the implementation and...

System and method to minimize glare in interoffice trunk allocat

System for accessing different resources having the same...

System for and method of extending a PBX phone port to a...

System for and method of hairpinning a remote PBX or KTS or...

System for connecting an incoming call to a selected one of a nu