Longshine LCS-8056C2 - Manual (Page 41)

Commands for Host-Processed Modems Reference Manual
100498E Conexant 3-19
&D - DTR Behavior
This parameter determines how the modem responds when the Data Terminal Ready (DTR)
input is changed from the ON to the OFF condition during online data state.
Syntax
&D[<value>]
Defined Values
<value> Decimal number corresponding to the selected option.
0 Modem ignores DTR.
1 Upon an on-to-off transition of DTR, the modem
enters online command state and issues an OK result
code; the call remains connected.
2 Upon an on-to-off transition of DTR, the modem
instructs the underlying modem to perform an orderly
cleardown of the call. The disposition of any data in
the modem pending transmission to the remote
modem is controlled by the +ETBM parameter;
otherwise, this data is sent before the call is cleared,
unless the remote modem clears the call first (in
which case pending data is discarded). The modem
disconnects from the line. Automatic answer is
disabled while DTR remains off.
Result Code
OK <value> = 0 or 2
ERROR Otherwise.