James E. Mathis

Multicast distribution of presence information for an instant messaging system

Wireless communication system incorporating multicast addressing and method for use

Apparatus and method for controlling and managing individual directed sessions in a communications system

Virtual pager for general purpose data terminal

Method and apparatus for detecting an alternate wireless communication network

System and method for controlling and managing sessions between endpoints in a communications system

Radio communications device and method with API between user application program and telephony program and method

System and methods for distributed connection and mobility processing in a multicast ip network incorporating multi-cell location areas

Methods for managing a pool of multicast addresses and allocating addresses in a communications system

Method of access to a channelized network from a packet data network