Method and apparatus for automatically switching between pulse c

Method and apparatus for controlling a computer to implement...

Method and apparatus for defeating a predictive telemarketing sy

Method and apparatus for detecting added keyboard functions

Method and apparatus for displaying an electronic phonebook

Method and apparatus for dynamic abbreviated dialing assignment

Method and apparatus for programming guestroom telephones

Method and apparatus for pulse/tone detection and selection

Method and apparatus for registering multiple phone numbers...

Method and apparatus for remote doorbell answering

Method and apparatus for returning a false special...

Method and apparatus for routing a dialed telephone number

Method and apparatus for searching a database

Method and apparatus for speed dialing via one-touch and two-tou

Method and apparatus for the secure communication of data

Method and apparatus for transmitting address changes

Method and system for detecting the state of dialing a...

Method and system for generation of tone signals over a transmis

Method and system for implementing an intelligent redial system

Method and system for routing calls to desire discount...