GSM/GPRS/GNSS Module Series
MC20 AT Commands Manual
MC20_AT_Commands_Manual Confidential / Released 4 / 255
3.3. AT+ICF Set TE-TA Control Character Framing .................................................................. 34
3.4. AT+IFC Set TE-TA Local Data Flow Control....................................................................... 35
3.5. AT+ILRR Set TE-TA Local Data Rate Reporting Mode ...................................................... 36
3.6. AT+IPR Set TE-TA Fixed Local Rate .................................................................................. 37
3.6.1. Adaptive Baud Rate .................................................................................................... 38
3.7. AT+CMUX Multiplexer Control ............................................................................................ 40
3.8. AT+QEAUART Configure Dual UART Function ................................................................. 41
3.9. AT+QSEDCB Configure Parameters of the Dual UART .................................................... 42
4 Status Control Commands ............................................................................................................... 44
4.1. AT+CEER Extended Error Report ...................................................................................... 44
4.2. AT+CPAS Mobile Equipment Activity Status ...................................................................... 45
4.3. AT+QINDRI Indicate RI When Using URC ......................................................................... 46
4.4. AT+QMOSTAT Show State of Mobile Originated Call ........................................................ 47
4.5. AT+QREFUSECS Refuse to Receive SMS/Incoming Call or Not ..................................... 48
4.6. AT+QIURC Enable or Disable Initial URC Presentation .................................................... 48
4.7. AT+QEXTUNSOL Enable/Disable Proprietary Unsolicited Indications .............................. 49
4.8. AT+QINISTAT Query State of Initialization ......................................................................... 51
4.9. AT+QNSTATUS Query GSM Network Status ..................................................................... 51
4.10. AT+QNITZ Network Time Synchronization......................................................................... 52
4.11. AT+QLTS Obtain Latest Network Time Synchronized ....................................................... 53
4.12. AT+CTZU Network Time Synchronization and Update the RTC Time .............................. 54
4.13. AT+CTZR Network Time Synchronization Report .............................................................. 55
4.14. AT+QSIMDET Enable/Disable SIM Card Detection ........................................................... 55
4.15. AT+QSIMSTAT SIM Inserted Status Reporting .................................................................. 56
4.16. AT+QCGTIND Circuit Switched Call or GPRS PDP Context Termination Indication ........ 57
5 SIM Related Commands .................................................................................................................... 59
5.1. AT+CIMI Request International Mobile Subscriber Identity (IMSI) .................................... 59
5.2. AT+CLCK Facility Lock ....................................................................................................... 60
5.3. AT+CPIN Enter PIN ............................................................................................................ 62
5.4. AT+CPWD Change Password ............................................................................................ 63
5.5. AT+CRSM Restricted SIM Access ...................................................................................... 65
5.6. AT+CSIM Generic SIM Access ........................................................................................... 66
5.7. AT+QCSPWD Change PS Super Password ...................................................................... 66
5.8. AT+CCID Show CCID ......................................................................................................... 67
5.9. AT+QCCID Show CCID ...................................................................................................... 68
5.10. AT+QGID Get SIM Card Group Identifier ........................................................................... 68
5.11. AT+QSIMVOL Select SIM Card Operating Voltage............................................................ 69
5.12. AT+QSPN Get Service Provider Name from SIM .............................................................. 70
5.13. AT+QTRPIN Times Remain to Input SIM PIN/PUK ........................................................... 70
6 Network Service Commands ............................................................................................................ 72
6.1. AT+COPS Operator Selection ............................................................................................ 72
6.2. AT+CREG Network Registration ........................................................................................ 74
6.3. AT+CSQ Signal Quality Report .......................................................................................... 75
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