Specifications
AT Command Set
TC35-ATC-01-V02.10 Page 9/145 02.10 / 23.05.2001
1.2 Restrictions
If autobauding is active, the multiplex mode (see +CMUX, pg. 67) can´t be activated (and if multiplex
mode has been entered, AT+IPR=<rate> is not possible).
When the serial interface is in multiplex mode (see +CMUX, pg. 67), data calls are only possible on
logical channel 1. Due to this restriction, AT commands have a different behaviour on channels 2+3
compared to channel 1. Some commands are not available, some other commands have a different
response.
The following list contains these commands:
Command Behaviour on channel 1 Differences on channel 2+3
AT+CBST as described not usable
AT+CR as described not usable
AT+CRLP as described not usable
AT+F.... (Fax Commands) as described not usable
+++ as described not usable
AT&C as described not usable
AT&D as described not usable
AT&F as described Data Call parameters not changed
AT&S as described not usable
AT&V as described Data Call parameters not displayed
ATA as described no Data Calls
ATD as described no Data Calls
ATDI<n> as described not usable
ATO as described not usable
ATS0
1
)
as described not usable
ATS3
1
)
as described not usable
ATS4
1
)
as described not usable
ATS5
1
)
as described not usable
ATS6
1
)
as described not usable
ATS7
1
)
as described not usable
ATS8
1
)
as described not usable
ATS10
1
)
as described not usable
ATS18
1
)
as described not usable
AT\Q as described not usable
ATZ as described Data Call parameters not changed
1
) TC35 supports the registers S0 - S29. You can change S0,S3,S4,S5,S6,S7,S8,S10 and S18 via the
related ATSn commands (see starting from pg. 21). The other registers are read-only and for internal
use only!
Allowed combinations of commands:
All these commands should not be combined with other commands on the same command line, oth-
erwise the responses may not be in the expected order.
V.25ter commands With
FAX commands, Prefix AT+F
GSM 7.07 commands With
Siemens commands, Prefix AT^S
GSM 7.05 commands (SMS) Used standalone
Example:
at+cpbs?;^snfi?
Response:
+CPBS: "SM",23,125
^SNFI: 5,32767
OK