Line circuit for key telephone systems
Line circuit for multiple line telephone
Line circuit for telephone installation
Line circuit for use with a key telephone system
Line conditioning and transfer circuit
Line control circuit
Line current detection
Line equalizer having pulse-width deviation detector for...
Line feed and isolation transformer with integral loop...
Line feed circuit for a digital signal loop
Line feed circuit including negative impedance circuit
Line hold circuits
Line indication
Line interface apparatus and method for isolating data...
Line interface circuit
Line interface circuit
Line interface unit
Line interruption arrangement
Line matching circuit for use in a tone pushbutton dialling...
Line powered coder/decoder (codec) capable of retaining an...