Code:
--> WvDial: Internet dialer version 1.53
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATX3+MS=V90,1,28800,33600,28800,56000
ATX3+MS=V90,1,28800,33600,28800,56000
OK
--> Modem initialized.
--> Sending: ATM1L1DT3020280
--> Waiting for carrier.
ATM1L1DT3020280
CONNECT 115200 
--> Carrier detected.  Waiting for prompt.
Welcome to 3Com Total Control HiPer ARC (TM)
Networks That Go The Distance (TM)
login: 
--> Looks like a login prompt.
--> Sending: *****
*****
Password: 
--> Looks like a password prompt.
--> Sending: (password)
--> Connected, but carrier signal lost!  Retrying...
--> Sending: ATM1L1DT3020280

Code:

[Dialer Defaults]
Modem = /dev/ttyS1
Baud = 57600
Init = ATZ
Init2 = AT&FW+MS=V90,1,28800,33600,28800,56000
Phone = 3020280
Username = *****
Password = **********

[Dialer shh]
Init3 = ATM0

[Dialer tone]
Dial Command = ATDT