Selective call waiting service

Selective call waiting service

Selective filtering of incoming telephone calls

Signal detection circuit and telephone apparatus

Signal-based session management for telephonic applications

Speakerphone state-controlled alerting arrangement

Spontaneous caller identification with call-waiting

Subscriber equipment muting method and apparatus

Switching system for providing an improved call waiting service

System for transmitting a change in call queued/hold state...

Systems and methods for providing selectable options to a...

Systems and methods for providing selectable options to a...

Techniques for providing caller name announcement

Telecommunication system intruding on a busy called party

Telecommunications device and method for providing...

Telephone apparatus having a multifunction call-waiting...

Telephone apparatus with interrupt call processing capability

Telephone call interuption request via internet

Telephone station voice announce device and method

Telephone system that notifies caller of called party's state