Comunicating with an external modem through R232 port

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  • October 20, 2011 at 4:55 pm #2653
    Mariano Lasala
    Participant

    Hello,

    We have conected an external modem via RS232 with a DB9 cable (male-male) to the MultiTech E1 serial port.

    We have read that this port is /dev/ttyS2 but when we try to execute microcom /dev/ttyS2 we have no response.

    Are we doing something wrong or it’s not possible to make this connection?

    Regards,

    Mariano Lasala

    October 20, 2011 at 5:07 pm #3462
    Lonny Knudson
    Blocked

    Hi Mariano,

    Is your DB9 cable a ‘straight’ cable or a crossover (sometimes called null modem) cable ?

    The serial port on the CDP is configured as a DCE interface, so you will need a null modem cable to connect to another DCE device like a modem.

    October 21, 2011 at 11:51 am #3463
    Mariano Lasala
    Participant

    OK! Thank 4 the info, i guess it’s a ‘straight’ cable.

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