Automatic volume adjustment in a wireless handset

Automatic, digitally synthesized matching line terminating...

Automatically configuring wireless pbx system

Automatically resetting protection arrangement for a...

Automatically testing telephone lines

Automatically-effected move of a subscriber between...

Automation of telephone operator assistance calls

Automation of telephone operator assistance calls

Automation of telephone operator assistance calls

Automobile telephone device with battery saver

Autonomous expert system for directly maintaining remote...

Autonomous registration overload control for cellular mobile...

Autoswitch voice messaging equipment

Auxiliary baseband telephone interface for an answering machine

Auxiliary monitoring of emergency access calls

Auxiliary structure for connecting connector for use in...

Auxiliary telephone signal apparatus activated by touch-tone...

Availability and location predictor using call processing...