Hi, Marvin, I did what you wrote. But the wvdial operation shows me that: Scanning your serial ports for a modem. Modem Port Scan<*1>: S0 S1 S2 S3 Sorry, no modem was detected! Is it in use by another program? Did you configure it properly with setserial? While kppp defines modem but it stops on "initializing" step. I tried the query modem operation. It worked though didn't show any notes in ATI strings. What's then? thanks for the help!