Modem Connect Line Interchange Circuits

    NCL Attribute Name    Circuit     Description
    ----------------------------------------------------------------------

    carrier detect        -           Received Line Signal Detector

    clear to send         -           Clear to Send

    data set ready        -           Data Set Ready

    data terminal ready   -           Data Terminal Ready

    local loopback        -           not supported

    remote loopback       -           not supported

    request to send       -           Request to Send

    ring indicator        -           Ring Indicator

    signalling rate       -           Data Signal Rate Selector (DCE)
    indicator

    signalling rate       -           Data Signal Rate Selector (DTE)
    selector

    test mode             -           not supported