GSM<=>GSM Data (CSD) connecting problem

  • Hello,


    Would you please help me with my GSM<=>GSM Data (CSD) connecting problem?


    I am trying to send chars from GSM1 to GSM2 connected to 2 laptops


    This is my AT commands in RX
    AT&F
    AT+cpin?
    AT+clip=1
    AT+creg=2
    AT+cmgf=0
    AT+cbst=7,0,1
    AT+crlp=61,61,39,1;+cr=1
    AT+fclass=0
    ATS0=1


    This is my commands in my TX


    AT&F
    AT+cpin?
    AT+clip=1
    AT+creg=2
    AT+cmgf=0
    AT+cbst=7,0,1
    AT+crlp=61,61,39,1;+cr=1
    AT+fclass=0
    ATS0=1
    ATdtXXXXXXXX



    Results:
    1) I receive CONNECT at TX console
    2) When I type chars in laptop 1 it does not show the chars in the second laptop, except when I type any char very fast like "uuuuuuuuuuu" it will show "u" in the second laptop(RX)
    the strange thing that I see " " (empty spaces) with any char I type then later on only random char from my typed one comes in the RX.


    I am very new in this field, Would you please help me with my problem?
    Do I need to use this command AT+MS=V34,1,300,4800,300,56000


    By the way, thank you for the forum admin to allow me to join to ask about this problem.


    Kind Regards,
    Rabbit