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I'm trying to connect a dial-up modem to a COM-port in Ubuntu.
Seems that dmesg | grep tty command return that there is the opened serial port, but neither minicom nor wvdial utilities establish the connection with the modem.
Minicom output:

" Welcome to minicom 2.5

OPTIONS: I18n Compiled on May 2 2011, 00:39:27.

Press CTRL-A Z for help on special keys"

Wvdialconf output:

Editing `/etc/wvdial.conf'.

Scanning your serial ports for a modem.

Modem Port Scan<*1>: Scanning ttyS0 first, /dev/modem is a link to it. ttyS0<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud ttyS0<*1>: ATQ0 V1 E1 -- ttyS0<*1>: failed with 9600 baud, next try: 115200 baud ttyS0<*1>: ATQ0 V1 E1 -- ttyS0<*1>: and failed too at 115200, giving up. Modem Port Scan<*1>: S1 S2 S3 S4 S5 S6 S7 S8
Modem Port Scan<*1>: S9 S10 S11 S12 S13 S14 S15 S16
Modem Port Scan<*1>: S17 S18 S19 S20 S21 S22 S23 S24
Modem Port Scan<*1>: S25 S26 S27 S28 S29 S30 S31

Sorry, no modem was detected! Is it in use by another program? Did you configure it properly with setserial?

Please read the FAQ at

Do you have any ideas how to connect the modem?

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Is this an internal modem? Maybe USR5610? If so, try ttyS4.

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