C - Rlsd Behavior; D - Dtr Behavior - Conexant H08-15355F Reference Manual

3.2.2.6 &C - RLSD Behavior
This parameter determines how the state of the Received Line Signal Detector (RLSD) output relates to the detection of
received line signal from the distant end. Changing the parameter will take effect immediately in both the command and
online command states.
In &C1 mode of operation, RLSD is not turned off until all data previously received from the remote modem is delivered to the
local DTE. However, such buffered data will be discarded and RLSD will be turned off if the DTE turns off DTR (if &D1 or &D2
is set).
Syntax
&C[<value>] <value> = 0 or 1.
Defined Values
<value> Decimal number corresponding to the selected option.
Result Code
OK <value> = 0 or 1
ERROR Otherwise.
3.2.2.7 &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>] <value> = 0 - 2.
Defined Values
<value> Decimal number corresponding to the selected option.
Result Code
OK <value> = 0 or 2
ERROR Otherwise.
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Command Reference Manual
0 RLSD is always ON.
1 RLSD follows the state of the carrier. (Default.)
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.
Conexant
3-13