TC35i AT Command Set
4.11 AT+CMUX
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TC35i_ATC_V02.07 Page 105 of 439 1/30/04
Confidential / Released
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
ATS0). The other registers are read-only and for internal use only!
2) The applicability of the +++ escape sequence depends on the customer's external application based on the Mulitplexer
Protocol. Recommendations for implementing an appropriate modem status command (MSC) are provided in [4], Chapter
"Escape Sequence".
Table 4.2: Summary of AT commands with Different Behavior in Multiplex Mode
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\V as described not usable
Command Description
AT\Q It is recommended to use hardware flow control (AT\Q3). XON/XOFF flow control
(
AT\Q1) is not supported in Multiplex mode.
See note regarding
AT\Qn settings stored with AT&W if Multiplex mode is active.
AT&V Different default configurations on channels 1, 2 and 3.
AT&W Different user profiles can be stored on each channel.
AT+IPR Before you start Multiplex mode, it is recommended to set the ME to 57600 bps
(minimum should be 4800 bps).
In Multiplex mode, the write command
AT+IPR=<rate> cannot be used.
AT+IPR=0 Multiplex mode cannot be activated while autobauding is enabled.
AT+CALA On each channel an individual <text> message can be stored. but only one time
setting applies to all channels. This means an alarm
<time> set on one of the
channels overwrites the time setting on all remaining channels. Therefore, the total
number of alarm events returned by the read command
AT+CALA? will always be
<n>=0, no matter whether individual text messages are stored.
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.
AT+CMEE Presentation mode can be separately configured for each channel.
AT+CNMA 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.
AT+CNMI Phase 2+ parameters can only be used on one channel. The parameter for <mt>
and
<ds> on the other channels have to be set to zero. If either a SM or a Status
Report is not acknowledged, all +CNMI parameter will be set to zero on all chan-
nels.
AT+CFUN If the ME is in Multiplexer mode, it is not recommended to activate SLEEP mode
with
AT+CFUN=<fun>. The best approach to properly control SLEEP mode in this
case is to issue the PSC messages described in [4], chapter "Power saving control
(PSC)".
Command Behavior on channel 1 Behavior on channel 2+3
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