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Category: FAQ:

  • 7.1 How to set the caller ID and the Connected Line Identification Presentation (CLIP)?

    1. You can use AT+CLIP=1 to present the calling line. And you can set AT+QCLIP=1 to present the string type corresponding to the entry saved in the phone book.

    2. You can use AT+COLP=1 to present the connected line.  And you can set AT+QCOLP=1 to present the string type corresponding to the entry saved in the phone book.

     

    Example:

     

    AT+CPBW=1,"02151082965",129,"QUECTEL"          //write phonebook entry

    OK

    AT+QCLIP=1         // present the string type corresponding to the entry saved in the phonebook

    OK

    AT+CLIP=1         //calling line identification enabled

    OK

    RING

    +CLIP: "02151082965",129,"",,"QUECTEL",0     // “QUECTEL” will be presented

    AT+QCOLP=1        // present the string type corresponding to the entry saved in the phonebook

    OK

    AT+COLP=1        //connected line identification enabled

    OK

    ATD02151082965;

    +COLP: "02151082965",129,"",0,"QUECTEL"      // “QUECTEL” will be presented 

  • 7.2 What is the maximum time that the module responds OK after executing ATH to hang off a call?

    According to the 3GPP standard, the maximum time that the module responds OK after executing ATH to hang off a call is 90seconds. You can set the proper timeout of ATH in the MCU program based on the maximum time.

  • 8.1 How to configure and query subscriber number?

    AT+CPBS="ON"                   //choose “ON” type of phonebook

    AT+CPBW=1,"number"     //write subscriber number

    AT+CNUM                              //query subscriber number

  • 8.2 How to configure/query phonebook number?

    AT+CPBS="SM"                      //choose “SM” type of phone book, which is to operate the phonebook saved in SIM card

    AT+CSCS="GSM"                   //Set the phonebook number and name as GSM format

    AT+CPBW=1,"number"        // Write phonebook entry whose index is 1

    AT+CPBR=1                             //Read phonebook entry whose index is 1 

  • 9.1 What is the maximum length of TCP domain name?

    99 bytes.

  • 9.2 What is the maximum length of APN?

    31 bytes.

  • 9.3 How many methods of receiving data under TCP/UDP connection?

    1. Non-transparent mode:

    You can get received data by the following two methods

    A.    Direct push access mode: Output received data directly from the UART port.

    B.    Buffer access mode: Read received data from internal buffer using AT commands.

    2. Transparent mode:

    You can only get received data directly from the UART port in this mode.

  • 9.4 What is the maximum length of data sent by AT+QISEND?

    1460 bytes.

  • 9.5 What is the maximum value of the parameters returned by AT+QISACK?

    Each parameter returned by AT+QISACK is defined as 32 bits data in the TCP protocol, so the maximum value of the parameters is 2^32 = 4294967296byte.

  • 9.6 Why the server has not yet received the data after the module responds “SEND OK”?

    When module receives “SEND OK”, it only means the data has already been sent to the buffer of the TCP socket rather than sent to the server. You can use AT+QISACK to check whether the data has been sent to the server or not.