Cabletron Systems CSMIM-T1 User Manual
Page 137
Commands
CSMIM-T1 Hardware Installation Guide
7-11
&D
n
DTR Control
&D0
Ignores DTR. DTR not needed for auto-answer.
&D1
Enters command state on detecting On-to-Off transition of DTR;
DTR not needed for auto-answer.
&D2
Goes on hook on detecting On-to-Off transition of DTR and
prepares the serial port to accept an AT at any speed. DTR needed
for auto-answer.
&D3
Goes on hook and resets on detecting On-to-Off transition of DTR
and prepares the serial port to accept an AT at any speed. DTR
needed for auto-answer.
The On-to-Off transition of DTR must last as long as the value
specified in register S25 (default is 0.05 second). Positive
transitions of DTR (Off-to-On) that occur within five seconds
after disconnect are ignored.
-D
Repeat Dial
-D
characters. Valid dial string characters are: 0-9, dial modifiers,
and for tone dial, #, A, B, C, D and *. The modem ignores invalid
characters.
-DL
Redials the last number dialed.
Redials a number up to 9 tries until connection. In reliable mode,
it does not redial if a remote modem answers but fails to establish
a reliable connection.
\D
n
Serial-Port DSR/CTS Control
\D0
DSR and CTS always On.
\D1
DSR and CTS follow DCD. If &C1 is also set, DSR follows off
hook.
\D2
DSR and CTS both follow DCD.
\D3
DSR complies with ITU-T recommendations, CTS always On.
\D4
DSR and CTS comply with ITU-T recommendations.
Controls the Data Set Ready (DSR) and Clear To Send (CTS)
signals on the serial port.
Table 7-1 shows the &C and \D settings and the result of
combining the two commands: