Multitech MultiModem iCell User Manual page 38

Chapter 3—Using Your Wireless Modem
Setting the Serial Baud Rate
Your MultiModem iCell defaults to a serial baud rate of 115200 from the factory. For faster baud rates, you can
manually set the modem to a higher speed (230400, 460800, or 921600) using the AT+IPR=<baudspeed>.
However, you must make sure the host serial port is capable of the new speed. If the new speed is set and the
host hardware is not capable of the higher speed, you will need to find a host that is capable or reset the nvram
with the following:
Open a terminal application such as HyperTerminal with the following settings:
19200, 8, NONE, Hardware Flow Control
When the modem boots there is a 500ms window to do the following:
Issue: M
Response: MU
Issue: D
Response: M
Issue: S
Response: S<cr><if>OK<cr><lf>
Recovery
To do this manually, power off the modem, depress the Caps Lock key and hold down the M key. Power on the
modem, a MU should display. Press the D key and then the S key quickly.
Multi‐Tech Systems, Inc. MultiModem iCell User Guide 38