Telephone signal transmission system
Telephone signaling circuit
Telephone signalling system
Telephone subscriber accommodation system in a broadband...
Telephone summing circuit
Telephone system adapted to telemarketing
Telephone system and method for transmitting digital...
Telephone system digital channel bank interface
Telephone system with added main line subscriber facilities
Telephone system without central office
Telephone terminal equipment
Telephone transmission system
Telephone transmission system
Telephony device for a telephony communications network with...
Teleprinter exchange system incorporated storage devices
Temperature compensated insensitive optical...
Temporal connection network and means to palliate breakdowns
Terminal control device for reference station in tdma...
Terminal for secured bidirectional link conveying...
Terminal service facility for non-synchronous system