Telephone with network-type sorting
Telephone with speed dial and recording of remotely transmitted
Telephone with touch-any-key dialing mode
Telephone with user recorded ringing signal
Telephonic apparatus with automatic area code dialing...
Telephonic apparatus with automatic preceding number dialing...
Telephonic automatic dialing system
Telephony distribution system
Telephony ring customization
Terminal apparatus
Terminal connection device
Terminal for a telecommunications switching system having an add
Terminal in communication network for notifying originating part
Test method for line equipment including a hybrid circuit...
Three relay C. O. trunk interface
Toll call telephone service center
Tone based answer detection for IP based telephones
Tone burst generator and its application to telephony
Tone detection
Tone detection