Self-adjusting telephone line status detection indication

Server apparatus

Service providing method for electronic device, customer...

Speakerphone sensing circuit

Speech system, extension communication terminal, and method...

Splitter assembly with inverted pots and line connectors

Stand-alone keyphone system

Switching arrangement for activating electrical devices

Switching system between a call center and public network

System and method for local replacement of music-on-hold

System and method for providing a multi-number plan for use with

System and method for provisioning an extra line on demand...

System and method of operation for a telecommunications...

System and method to alter the functions assigned to the keys of

System for setting registration mode for key telephone set

Systems and methods for voice and data communications...