Telephone set

Telephone set

Telephone set comprising a line voltage stabilizer having a DC s

Telephone set having a volatile memory

Telephone set in which an echo signal is effectively cancelled i

Telephone set line status display

Telephone set usable as an acoustic coupler

Telephone set which can be adjusted in response to ambient noise

Telephone set with background noise suppression function

Telephone set with circuit for suppression of howling and echo

Telephone subscriber system incorporating a drive interface for

Telephone system allowing hold releasing request from central of

Telephone system with automatic volume control

Telephone terminal and method for supplying power to the same

Telephone terminal apparatus and method

Telephone terminal device

Telephone terminal discount accessory device

Telephone terminal having multiple handsets

Telephone terminal with control of voice reproduction...

Telephone to computer audio interface