AT Command Set - Olitec

Command Behaviour on channel 1 Differences on channel 2+3ATS10 1 ) as described not usableATS18 1 ) as described not usableAT\Q as described not usableATZ as described data call parameters not changed1)2)3)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 pg. 30).MC35 allows to use the GPRS commands on all logical channels, but to remain compatible to futurereleases it is recommended to use them on channel 1 only. PDP contexts can be defined onany channel, but are visible and usable only on the channel on which they are defined (thus it isnot possible to define a context on channel 2 and activate it on channel 3). GPRS data calls can beinitiated on any channel but will be always established on channel 1.The applicability of the +++ escape sequence depends on the customer’s external applicationbased on the Mulitplexer Protocol. Recommendations for implementing an appropriate modemstatus command (MSC) are provided in [5], Chapter “Escape Sequence”. The demo program PCMUX uses +++ as described in Chapter 2.2.Table 8: Summary of AT commands with different behaviour in Multiplex modeCommand Description ChapterAT\QATHIt is recommended to use hardware flow control (AT\Q3). XON/XOFFflow control (AT\Q1) is not supported in Multiplex modeTerminates any voice, fax or CSD call in progress, no matter whatchannel was used to enter ATH.Terminates GPRS connections or clears active PDP context if issuedon the same channel.AT&V Different default configurations on channels 1, 2 and 3 2.37AT+IPRAT+IPR=0AT+CALABefore you start Multiplex mode, it is recommended to set the ME to57600 bps. For GPRS we suggest to use 115200 bps .The bit rate cannot be changed while Multiplex mode is active, thereforedo not use AT+IPR= in this mode.Autobauding is not compatible with Multiplex mode. It is neither possibleto start MUX when autobauding is active, nor to set autobaudingduring Multiplex mode.Alarm calls can be separately configured on each channel. The readcommand returns the total number of alarm calls activated on allchannels.AT+CMEE Presentation mode can be separately configured for each channel. 4.25AT+CNMAAT+CNMIIf Multiplex mode is activated the +CNMI parameter will be set to zeroon all channels, if one channel fails to acknowledge an incomingmessage within the required time.Phase 2+ parameters can only be used on one channel. The parameterfor and on the other channels have to be set tozero. If either a SM or a Status Report is not acknowledged, all+CNMI parameter will be set to zero on all channels.2.32.122.452.45.14.25.95.10Page 101 of 207