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2.14
AT^SM20 Set M20 compatibility mode
M20 is an earlier, widely used SIEMENS GSM engine. The
responses returned upon execution of the commands
that the
command has no effect on any other features and is not intended to adjust other differences
AT^SM20
between M20 and MC55.
Syntax
Test Command
AT^SM20=?
Response(s)
OK
Read Command
AT^SM20?
Response(s)
^SM20:<CallMode>,
OK
Write Command
AT^SM20=<CallMode>[, <CmgwMode>]
Response(s)
OK
Reference(s)
SIEMENS
Parameter Description
(num)
<CallMode>
Call setup response mode
Applies only to voice calls.
0
(&F)
1
(num)
<CmgwMode>
Response mode for sending and writing short messages
Applies to the sms commands like e.g.
0
(&F)
1
MC55_ATC_V04.00
Confidential / Released
<CmgwMode>
Set compatibility to Siemens mobile phones.
ME will return "OK" immediately after attempting a call with the
In case of failure, additional call release indications, such as "NO DIAL TONE,
"NO CARRIER", "BUSY" will follow.
Default call setup mode, compatible to M20.
ME will return "OK" in case of a successful connection, otherwise one of the
call release indications "NO DIAL TONE, "NO CARRIER", "BUSY" are indi-
cated.
AT+CMGS
Set compatibility to Siemens mobile phones.
ME will return +CMS ERROR: <err> when writing or sending of short mes-
sages fails.
Default mode for sending and writing short messages, compatible to M20.
ME will return "OK", no matter whether or not sms command was successfully
executed.
Page 59 of 475
command selects different modes of
AT^SM20
and sms commands like e.g. AT+CMGW. Please note
ATD
PIN
ASC0 ASC1
MUX1
!
%
%
%
and
command.
AT+CMGW
MUX2
MUX3 Charge
%
%
!
!
command.
ATD
Last
!
3/17/06
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