Telephone tuning and signaling system
Telephone visual signaling device
Telephone with call-incoming-operation limiting function and...
Telephone with environmentally-influenced call indicator
Telephone with user recorded ringing signal
Telephony ring customization
Terminal connection device
Terminal in communication network for notifying originating part
Toy type children telephone set
True alert indication
Tune master internet protocol device
Unique ringing on a prime telephone
Use of an echo canceller for the detection of CAS signals
Voice caller ID
Voice caller ID
Voice paging service control method in a switching system
Volume control apparatus of telephone
Woodpecker simulating telephone ringing device