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Voice Firewall

System and Method for Implementing Telephony Call Control via a Set of Components That Communicate with Each Other via a Unique Telephony Protocol

Methods, Systems, and Computer Program Products for Automatically Establishing a Conference Call Having a Plurality of Different Subscriber Participation Classes

Methods, Systems, and Computer Program Products for Using a Personal Conference to Privately Establish and Control Media Connections with a Telephony Device

Methods, Systems, and Computer Program Products for Emergency 911 (E911) Registration Assistance for Subscribers Using Portable Internet Protocol (Ip) Communications Devices

Methods, systems, and computer program products for transaction-based internet protocol (IP) telephony call processing

Methods, Systems, and Computer Program Products for Flexible Call Jumping

Methods, Systems, and Computer Program Products for Jumping Calls Between Different Modes of the Same Device

Systems, Methods, and Apparatus for Communicating the State of a Wireless User Device in a Wireless Domain to an Application Server in an Internet Protocol (Ip) Domain

System and Method for Reestablishing, with a Client Device, a Signaling Session Associated with a Call in Progress