Multitech MT2834ZDX - Command Group: Dialing and DTR Control; Dialing Commands; Data Terminal Ready (DTR) Control

Quick Reference Guide
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Command: D s Dial
Values: s = dial string (phone number and dial modifiers)
Default: none
Description: Dial telephone number s , where s may include up
to 60 digits and T, P, R, comma, colon, and
semicolon characters.
Command: D s N d Store Telephone Number
Values: s = dial string (phone number and dial modifiers)
d = 0 or 1
Default: none
Description: To store, enter D followed by dial string s , then N
followed by directory number d .
Example: ATDT9,5551212N1.
Command: &D n Data Terminal Ready Control
Values: n = 0–3
Default: 2 (ZDX, ZDXI, ZDXK)
0 (ZDX-Mac, ZDXK-Mac)
Description: &D0 Modem ignores DTR signal.
&D1 When DTR drops, the modem hangs up. While
DTR is low, the modem accepts commands but
will not dial or auto-answer until DTR goes high
again.
&D2 Same as &D1.
&D3 When DTR drops, the modem hangs up and
resets as if an ATZ command were issued.
Command: $D n DTR Dialing
Values: n = 0 or 1
Default: 0
Description: $D0 Do not dial when DTR goes high.
$D1 Dial stored number N0 when DTR goes high.