MC52i AT Command Set

MC52i AT Command Set
4.8 AT+CMUX
Command
AT&W
AT+IPR
AT+IPR=0
AT+CALA
AT+CMEE
AT+CNMA
AT+CNMI
AT+CFUN
AT+CPMS
AT^SSDA
Description
Different user profiles can be stored on each channel.
Before starting Multiplex mode, ensure that the bit rate set with AT+IPR is not lower
than 57600 bps. For using data services in Multiplex mode it is recommended to
set at least 115200 bps. Remember that for MC52i Terminal 115200 bps is the
maximum bit rate.
In Multiplex mode, the write command AT+IPR= will not change the bit rate
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 message can be stored. but only one time
setting applies to all channels. This means an alarm 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
=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.
Presentation mode can be separately configured for each channel.
If Multiplex mode is activated the +CNMI parameter will be set to zero on all channels,
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
Report is not acknowledged, all +CNMI parameter will be set to zero on all channels.
If the ME is in Multiplexer mode, it is not recommended to activate SLEEP mode
with AT+CFUN=. The best approach to properly control SLEEP mode in this
case is to issue the PSC messages described in [4], Section "Power saving control
(PSC)".
Parameter will be the same on all instances, but the settings of
and may vary on each instance.
If one instance is set to =1 and =1, then all other instances must be configured
for =0.
MC52i_ATC_V01.201 Page 101 of 551 4/16/10
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