Synaccess Networks NP-0801DTM - Manual (Page 34)

HAYES COMPLIANT AT COMMANDS
HSPA+ AT Commands Reference Guide 34
Parameters and Values
<n>
0 Device ignores DTR transitions. Default: 0.
1 DCD follows the carrier detect status: if carrier is detected DCD is high, otherwise
DCD is low.
2 When the module is connected, the high to low transition of DTR pin sets the
device in command mode, the current connection is not closed.
3 Device ignores DTR transitions.
4 C108/1 operation is disabled.
5 C108/1 operation is enabled. Same behavior as for <n>=2.
Notes
„
If a connection is set up issuing #SKTD, then AT&D1 has the same effect as AT&D2. If a connection is set up
issuing AT#SD then AT&D1 and AT&D2 have different effect, as described above.
„
If AT&D2 is issued and the DTR is tied Low, autoanswering is inhibited and it is possible to answer only issuing
command ATA.
„
If parameter is omitted, the command has the same behavior as AT&D0.
„
Reference: V.25ter.
Data Set Ready (DSR) Control &S
Set command controls the RS232 DSR pin behavior.
Syntax
Command Command type
AT&S[<n>] Set
Parameters and Values
<n>
0 Always high.
1 Follows the GSM traffic channel indication.
2 High when connected.
3 High when device is ready to receive commands. Default: 3
Notes
„
If option 1 is selected then DSR is tied high when the device receives from the network the GSM traffic channel
indication.
„
In power saving mode the DSR pin is always tied low.
„
If parameter is omitted, the command has the same behavior as AT&S0.