Data Terminal Ready (DTR)

Data Terminal Ready (DTR) - pin 20

Data Terminal Ready is used for both call initiation, call termination, suppressing Autoanswer, and initiating a hard reset. The actual response to DTR or a change in DTR depends on the &Dn and &Qn commands in effect and may also depend on S25 and S94. Some modem functions are affected by the level of DTR, while other functions may be affected by a transition in DTR. Also, DTR may affect the TR indicator.

See the &Dn and &Qn commands.

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