Apparatus and method for identifying a failed subscriber unit in

Apparatus and method for improved dial-type recognition

Apparatus and method for intelligent call routing and call retur

Apparatus and method for intelligent conference call codec...

Apparatus and method for local number portability using nongeogr

Apparatus and method for managing telephony-based services

Apparatus and method for multi-access conference call in...

Apparatus and method for network-initiated real-time...

Apparatus and method for network-initiated real-time...

Apparatus and method for network-initiated real-time...

Apparatus and method for network-initiated real-time...

Apparatus and method for permitting temporary use of a...

Apparatus and method for providing a user with one telephone num

Apparatus and method for providing advanced communication...

Apparatus and method for providing conference call roster...

Apparatus and method for providing conference call service

Apparatus and method for providing echo suppression to a plurali

Apparatus and method for providing enhanced...

Apparatus and method for providing remote users with the same un

Apparatus and method for providing services prior to call comple