Man-to-machine communication during on-line conversation in keyp

Memory card connectable to a telephone

Method and apparatus allowing remote key system units to...

Method and apparatus for delivering secured telephony...

Method and apparatus for designating and making an automatic cal

Method and apparatus for displaying multiple languages in key ph

Method and apparatus for interfacing a drive-thru intercom...

Method and apparatus for processing telephone calls from one lin

Method and apparatus for recording or forwarding messages

Method and apparatus for sharing speakerphone processor among mu

Method and configuration for controlling and/or monitoring a...

Method for controlling and processing an incoming call of a line

Method for embodying automatic call in a keyphone system

Method for exchanging a buzz signal between keyphone subsets

Method for interfacing between a key-phone system and a key-phon

Method for printing key telephone designation strips

Method for providing telephone services for commercial...

Method for providing telephone services for commercial...

Method of and apparatus for controlling operation of a multi-lin

Method of and apparatus for hiding numbers inputted by a...