Method and apparatus for secondary-option message delivery throu

Method and apparatus for selecting data from multiple...

Method and apparatus for selectively providing messages in...

Method and apparatus for selectively providing messages in...

Method and apparatus for sharing a single telephone line between

Method and apparatus for sharing a single telephone line between

Method and apparatus for switching to a modem in a key telephone

Method and apparatus for taking a note while in a call

Method and apparatus for telecommunications advertising

Method and apparatus for telecommunications signal routing...

Method and apparatus for telephone access security

Method and apparatus for telephone data network access

Method and apparatus for transferring a data call

Method and apparatus for transmitting coded audio signals throug

Method and apparatus for transmitting coded audio signals...

Method and apparatus for transmitting coded audio signals...

Method and apparatus for transmitting coded audio signals...

Method and apparatus for transmitting information in response to

Method and apparatus for using a D-channel for displaying user d

Method and apparatus for using telephone house wiring for voice/