Hi.  As you may have guessed, I'm having problems with PPP config as 
well.  Here goes.  My machine is a Powerbook 550c, with 28 MB RAM.  The 
modem is a Hayes Optima 288B. I'm running the Apr. 7th (?) snapshot of 
NetBSD. 
I'm trying to get PPP going to my ISP.  I copied my MacOS connection 
script, word for word, including the modem init, and it doesn't work.  
What I get is Connect: ppp0 <-> /dev/tty00
then, I get Modem hangup
then, i get Connection hangup, followed by a short delay, and then the 
modem actually disconnects. 

My options file looks like this:

ABORT BUSY
ABORT "NO CARRIER"
ABORT "NO DIAL"
TIMEOUT 10
"" AT OK ATZ OK "AT&F&C1&D0&K3S10=40\10" OK ATDT$NUMBER
TIMEOUT 30
CONNECT ""
sername:\r--sername:  $USERNAME
assword:              $PASSWD
>                     "ppp default"

the ppp default must be there, because my ISP allows dialin from across 
Canada, and if you don't, you won't connect...

I also can't tell how far it gets into the chat script.  the Modem lights 
flash for about 5-10 seconds, and then cease, and I get the modem hangup 
message.