Telephone switch hook interface circuit
Telephone system with controllable ringing voltage
Telephone system with current regulation in the constant...
Telephone-coupled device for internet access
Temperature compensation for trans-hybrid loss in a miniaturized
Terminal equipment for telecommunications and information proces
Terminal for telegraph and telephone systems
Termination block
Termination circuit for a two-wire transmission line
Termination device for a telephone line
Thermally coupled information transmission across electrical iso
Tip-ring voltage correction circuit
Tracking switchmode power converter for telephony interface...
Tracking switchmode power converter for telephony interface...
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