This is wvdial.conf configuration with Sierra's AirCard 875U USB Modem, it works on Debian Lenny (kernel-2.6.26)
[Dialer Defaults]
Modem = /dev/ttyUSB0
Baud = 9600
Init = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Phone = *99#
Username = www.xlgprs.net
Password = proxl
New PPPD = yes
lsusb output:
Bus 004 Device 002: ID 1199:6812 Sierra Wireless, Inc. MC8775 Device
