Gregory T. Osterhout

Method and system for communications between different types of devices

Portable call management system

Controlling voice communications over a data network

Session initiation protocol enabled set-top device

Configuring user interfaces of call devices

System and method for network phone having adaptive transmission modes

Call redirection through portable device

Convergence of circuit-switched voice and packet-based media services

Geographic redundancy in communication networks

Establishing real-time interactive audio calls by a computer on behalf of a packet-switched data network telephone