2. Background Information Advances in microprocessor, networking, and telecom
munication technologies have led to the development of large Scale public networks, Such …

The present invention solves the problem of deter mining whether an incoming call is
intended for a pri mary or a secondary station by providing call identifica tion apparatus that …

Provided is a method and system for establishing a network initiated PoC group session,
capable of initiating establish ment of a PoC Session at a point of time when presence …

0003 2. Description of the Related Art 0004. The Internet Multimedia Sub-system
(hereinafter referred to as IMS), as shown in FIG. 1, is a structural frame work established by …

2002-08-06 Assigned to QUALCOMM INCORPORATED A DELAWARE CORPORATION
reassignment QUALCOMM INCORPORATED A DELAWARE CORPORATION …

This invention relates to communications Systems and, in particular, to a method and
apparatus that provides a noti fication to all parties on an existing call connection of changes …

A high availability VoIP system interfacing with a PSTN or other TDM network to provide
higher availability and better failure recovery wherein the high availability VoIP system …

(54) METHOD AND APPARATUS FOR THE 6,839,414 B1* 1/2005 Enzmann et al.......
379,142.06 PREVENTION OF UNWANTED CALLS IN A 7,162,019 B1* 1/2007 Mullis et …

Correspondence Address: A customer service center or other facility receives session FSH &
RICHARDSON PC imitation protocol (SIP) messages transmitted from a web PO BOX 1022 …

US8886244B2 - Method and apparatus for ensuring critical resource allocation for group calls
made in a push-to-talk communication environment - Google Patents US8886244B2 - Method …