> chat:  May 08 21:04:40 CONNECT 50666/ARQ/V90/LAPM/V42BIS
> chat:  May 08 21:04:45 BEDFORD, MA .112
This output indicates that your call has terminated on a different modem
rack at your ISP from the working connection
> Serial connection established.
> Using interface ppp0
> Connect: ppp0 <--> /dev/dty00
> sent [LCP ConfReq id=0x6 <asyncmap 0x0> <magic 0x6182d756> <pcomp> <accomp>]
> rcvd [LCP ConfReq id=0x1 < 00 04 00 00> <mru 1524> <asyncmap 0x0> <auth pap> <pcomp> <accomp> <mrru 1524> <endpoint 13 09 03 00 c0 7b 8a c3 95> < 17 04 a3 00>]
> sent [LCP ConfRej id=0x1 < 00 04 00 00> <auth pap> <mrru 1524> < 17 04 a3 00>]

They are asking for PAP authentication here which you reject. They are not
happy with that so they terminate the PPP connection.

> sent [LCP ConfReq id=0x6 <asyncmap 0x0> <magic 0x6182d756> <pcomp> <accomp>]
> rcvd [LCP TermReq id=0x2]
> sent [LCP TermAck id=0x2]
> Modem hangup
> Connection terminated.
> Connect script failed
> 
> when it works it looks like this.
>
[snipped working trace]

The working trace does not request PAP authentication so I assume you are using
a scripted login. Try configuring /etc/ppp/pap-secrets with the same login
and password as you are using for the scripted login. Windows will certainly
do this so the ISP modem rack will appear to be working fine to any Windows
user.

Mike