Trans-hybrid loss compensator for on hook transmission
Transceiver with integrated hybrid circuit
Transformed current sensing relay for use in switched network mo
Transformer telephone line interface circuit
Transformer-less hybrid circuit
Transformerless hybrid circuit
Transformerless hybrid circuit having direct powered line-side a
Trunk interface circuit having function of battery feed to centr
Two port signalling voltages filter arrangement
Two-input crosstalk-resistant adaptive noise canceller
Two-line subscriber system
Two-wire termination impedance generation circuit of subscriber
Two-wire to four-wire switching exchanger
Two-wire/four-wire converter
Two-wire/four-wire converter
Unbalanced ringing using a balanced ringing generator of a subsc
Universal channel unit switchable between two wire and four wire
Universal line interface in telecommunications system
Universal telephony interface polarity detector
Unpowered twisted pair loopback circuit for differential...