Table 4.2: Summary Of At Commands With Different Behavior In Multiplex Mode - Siemens MC55 Command Set

MC55 AT Command Set
4.8 AT+CMUX
Command
ATO
1)
ATS6
1)
ATS7
1)
ATS8
1)
ATS10
1)
ATS18
1) Siemens GSM engines support the registers S0 - S29. You can change S0,S3,S4,S5,S6,S7,S8,S10 and S18 using the
related ATSn commands (see starting from
2) The applicability of the
+++
Protocol. Recommendations for implementing an appropriate modem status command (MSC) are provided in [5], Chapter
"Escape Sequence".
3) PDP contexts can be defined on any channel, but are visible and usable only on the channel on which they are defined
(thus it is not possible to define a context on channel 2 and activate it on channel 3). GPRS connections can be estab-
lished on two channels at a time.
Table 4.2: Summary of AT commands with Different Behavior in Multiplex Mode
Command
AT\Q
AT&V
AT&W
AT+IPR
=0
AT+IPR
AT+CALA
AT+CMEE
AT+CNMA
AT+CNMI
MC55_ATC_V01.05
Confidential / Released
Behavior on channel 1
as described
as described
as described
as described
as described
as described
). The other registers are read-only and for internal use only!
ATS0
escape sequence depends on the customer's external application based on the Mulitplexer
Description
It is recommended to use hardware flow control (
( 1) is not supported in Multiplex mode.
AT\Q
See note regarding
AT\Q
Different default configurations on channels 1, 2 and 3.
Different user profiles can be stored on each channel.
Before you start Multiplex mode, it is recommended to set the ME to 57600 bps
(minimum should be 4800 bps). For GPRS we suggest to use 115200 bps or
230400 bps.
In Multiplex mode, the write command
currently used, but the new bit rate will be stored and becomes active, when the
module is restarted.
Multiplex mode cannot be activated while autobauding is enabled.
On each channel an individual
setting applies to all channels. This means an alarm
channels overwrites the time setting on all remaining channels. Therefore, the total
number of alarm events returned by the read command
=0, no matter whether individual text messages are stored.
<n>
When the alarm is timed out and executed the ME sends the URC only on the
channel where the most recent alarm setting was made. The alarm time will be
reset to "00/01/01,00:00:00" on all channels.
Presentation mode can be separately configured for each channel.
If Multiplex mode is activated the +CNMI parameter will be set to zero on all chan-
nels, if one channel fails to acknowledge an incoming message within the required
time.
Phase 2+ parameters can only be used on one channel. The parameter for
and on the other channels have to be set to zero. If either a SM or a Status
<ds>
Report is not acknowledged, all +CNMI parameter will be set to zero on all chan-
nels.
Page 101 of 469
Behavior on channel 2+3
not usable
not usable
not usable
not usable
not usable
not usable
AT\Q
n settings stored with
AT&W
=
AT+IPR <rate>
message can be stored. but only one time
<text>
s
m
obile
3). XON/XOFF flow control
if Multiplex mode is active.
will not change the bit rate
set on one of the
<time>
? will always be
AT+CALA
<mt>
2/10/04