Basic Techniques in Data Communications

9600 bps modem acoustic coupler adaptive equalizer amplitude answer tone ASYNC asynchronous data AUTOMATIC CALLING UNIT bandwidth basic baud bisync block buffer cable Carrier Detect channel characters circuit Clear to Send connect connectors coupler data access arrangements data communications data rate Data Set Ready data stream Data Terminal Ready data transmission delay demodulator device DIAL DIGIT dial network dial-up dibit disconnect duplex echo suppressor EIA interface encoding encrypted equipment exclusion key Figure four-wire full-duplex functions half-duplex handset leased line line drivers line impairments loopback manually modulation monitor multidrop multiplexer multipoint network control no-modem noise off-hook operate option output patch panel pattern phase error phone company phone line polling possible private lines protocol pulse receive data remote Request to Send scrambler send and receive sideband simulator SPARE MODEM SYNC synchronous technique telephone set tion transmit tribit two-wire