Problems with configuring dialup on an external modem

[Bill Hudspeth]

Hello, 

I am running Ubuntu 8.04, and am having problems getting my dialup to
work. After installing gnome-ppp, I was initially able to get my
external serial port modem up and running with no problems. Since then,
the modem connects successfully, but hangs up at exactly 30 seconds.

Following instructions in the Ubuntu Dial-up Wiki, I have set
carrier_check=no in wvdial.conf. When I try to connect with wvdial, the
authentication fails, although I know the password is correct.

I also made changes to the "/etc/ppp/options" file, commenting out the
lines:

#lcp-echo-interval=30,  and 
#lcp-echo-failure4. 


Running wvdialconf gives the following output:

Scanning your serial ports for a modem.


ttyS0<*1>: ATQ0 V1 E1 -- OK 
ttyS0<*1>: ATQ0 V1 E1 Z -- OK 
ttyS0<*1>: ATQ0 V1 E1 S0=0 -- OK 
ttyS0<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK 
ttyS0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK 
ttyS0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK 
ttyS0<*1>: Modem Identifier: ATI -- 57600 
ttyS0<*1>: Speed 4800: AT -- OK 
ttyS0<*1>: Speed 9600: AT -- OK 
ttyS0<*1>: Speed 19200: AT -- OK 
ttyS0<*1>: Speed 38400: AT -- OK 
ttyS0<*1>: Speed 57600: AT -- OK 
ttyS0<*1>: Speed 115200: AT -- OK
ttyS0<*1>: Max speed is 115200; that should be safe. 
ttyS0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK 
ttyS1<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud 
ttyS1<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 115200 baud 
ttyS1<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up. 
Modem Port Scan<*1>: S2 S3 
Found a modem on /dev/ttyS0. 
Modem configuration written to /etc/wvdial.conf. 
ttyS0<Info>: Speed 115200; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0" 


Any help would be appreciated,

William