DE910-DUAL AT commands reference guide
80392ST10102A Rev.2 – 2012-07-03
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 44 of 261
&C - Data Carrier Detect (DCD) Control
1 -
DCD
follows the Carrier detect status: if carrier is detected
DCD
is high,
otherwise
DCD
is
low
. (factory default)
2 -
DCD
off
while disconnecting
Note: if parameter is omitted, the command has the same behaviour of
AT&C0
Reference
V25ter
&D - Data Terminal Ready (DTR) Control
AT&D[<n>]
Set command controls the Module behaviour to the RS232
DTR
transitions.
Parameter:
<n>
0 – device ignores
DTR
transitions
(factory default) ; if
+CVHU
current setting is
different from 2 then every setting
AT&D0
is equivalent to
AT&D5
1 - 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; if
+CVHU
current setting is different from 2 then issuing
AT&D1
is equivalent to
AT&D5
2 - when the MODULE is connected , the
High
to
Low
transition of
DTR
pin sets
the device in command mode and the current connection is closed; if
+CVHU
current setting is different from 2 then issuing
AT&D2
is equivalent to
AT&D5
3 – device ignores
DTR
transitions; if
+CVHU
current setting is different from 2
then issuing
AT&D3
is equivalent to
AT&D5
4 -
C108/1
operation is disabled. If
+CVHU
current setting is different from 2
then issuing
AT&D3
is equivalent to
AT&D5
5 -
C108/1
operation is enabled; same behaviour as for
<n>
=2
Note: if a connection has been set up issuing either
#SKTD
or
#SKTOP
, then
AT&D1
has the same effect as
AT&D2
. If a connection has been set up issuing
AT#SD then AT&D1 and AT&D2 have different effect, as described above.
Note: if
AT&D2
has been issued and the
DTR
has been tied
Low
, auto answering
is inhibited and it is possible to answer only issuing command
ATA
.
Note: if parameter is omitted, the command has the same behaviour of
AT&D0
Reference
V25ter
\Q - Standard Flow Control
AT\Q[<n>]
Set command controls the RS232 flow control behaviour.
Parameter:
<n>
Содержание DE910-DUAL
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