Method and apparatus for establishing communications between...

Method and apparatus for establishing communications from...

Method and apparatus for establishing communications with a...

Method and apparatus for establishing communications with a...

Method and apparatus for establishing communications with a...

Method and apparatus for estimating the call grade of...

Method and apparatus for facilitating intra-premises voice...

Method and apparatus for fallback routing of voice over...

Method and apparatus for fast DTMF detection

Method and apparatus for fast DTMF detection

Method and apparatus for functional architecture of...

Method and apparatus for handling IMS terminal's call...

Method and apparatus for hybrid protection in a switching...

Method and apparatus for iconifying and automatically...

Method and apparatus for implementing a computer...

Method and apparatus for implementing a high-reliability...

Method and apparatus for implementing a high-reliability...

Method and apparatus for implementing feature assist on a...

Method and apparatus for improving call setup efficiency in...

Method and apparatus for increased quality of voice transmission