Boca Pro16 Series - D Controlling Data Terminal Ready (DTR)

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BOCA PRO16 Reference Guide

COMMAND MEANING

&D Controlling Data Terminal Ready (DTR)

The DTR signal is used to indicate to the modem whether your computer

is ready to communicate.

FThe &D command will only take effect when the DTR option switch

is in the UP position and %S0 is selected. (See the Dumb Mode Section

for details.)

Options

nAT&D0 The modem ignores the DTR signal and acts as if it is

asserted (the modem assumes the computer is ready to

communicate). AT&D1 The modem will return to on line

command state if DTR is lowered during a connection.

AT&D2 The modem will hang up, return to local command state

and disable auto-answer while DTR is low (is not as-

serted). To enable auto-answer, the DTR signal must be

asserted. The computer must assert DTR before dialing or

answering may commence.

AT&D3 If DTR is lowered, the modem will hang up, return to local

command state and initialize itself with the values stored

in the &Y profile.

AT&D4 The modem will hang up, return to local command state

and go off-hook. It will remain off-hook while DTR is

low.

FS Register 25 determines how long DTR must be low before the

modem recognizes it as such.

FS Register 75 determines how long DTR must be high before the

modem recognizes it as such.

Range

0-3