Typical connections

baud rate generator

terminal

RxDTxD

RxCTxC

baud rate generator

asyncmodem

RxDTxDDSRDTR

CTSRTS

RxCTxC

phone line

interface

phoneline

syncmodem

RxDTxDDSRDTR

CTSRTS

RxCTxC

phone line

interface

phoneline

• Terminal

• Asynchronous modem

Synchronous modem

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