Sierra Raven EDGE - Manual (Page 127)

Windows Dial-up Networking (DUN)
Rev 3.0B Feb.08 123
b. Select the Modem tab.
Figure 3-9: Modem Properties: Modem
c. Maximum Port Speed should be set to 115200
(default).
d. Select OK to exit.
e. Select OK again to exit out of the Phone and Modem
Options.
Creating a Dial-Up Networking
(PPP) Connection
Once you have the driver for the modem installed on your
computer, you can set up and configure Dial Up Networking
(DUN) to use the modem as your connection to the Internet
using PPP.
Note: No other device or program can be using the same COM port
(serial port) configured for the modem driver.