Multitech MULTIMODEM MT5600ZDX Owner's Manual page 77

Procedure:
1. Install in the modem a flash memory programmed with the modem
firmware; ensure that the flash memory device is programmed
with the sector secure mode set to UNSECURE (AMD only),
otherwise the device cannot be re-programmed in the modem.
2. Put the FLM file and the new modem firmware file (e.g.,
V1400DS.S37) in an appropriate directory on the computer's hard
disk.
3. Configure the communications application program for a DTE rate
of between 9600 bps and 57600 bps and RTS/CTS flow control. A
load at 57600 bps will take approximately 2 minutes; a load at
19200 bps will take approximately 6 minutes.
4. Check the modem for response by typing AT.
5. Initiate the download process using the AT**n command, where:
AT** or AT**0 Download speed is the last sensed speed
(recommended command).
AT**1 Download speed is 38.4k bps.
AT**2 Download speed is 57.6k bps.
The "Download Initiated" message appears upon issuing the
AT**n command.
6. Perform an ASCII upload of the FLM file (e.g., AMDE.S37) from
the host computer to the modem RAM using an industry standard
communications software or an equivalent process (ensure that all
ASCII translation or pacing is turned off). To abort the load at this
point, wait for the FLM download process to time-out, send a bad
S37 record, or reset the modem. If the load process times-out,
the modem must be reset (ATZ) before the FLM can be loaded
again.
7. After the FLM has been loaded, perform an ASCII upload of the
new modem firmware hex file (e.g., RC288ACi.S37) from the host
computer to the modem RAM using an industry standard
communications software or an equivalent process. There will be
a 3-second pause after the first record of the RC288AXX.S37 file
is sent, which is the FLASH erase cycle. There is no turning
back at this point. If the flash download fails (because of a bad
.S37 record for example) or the upload is aborted, as long as the
modem is not turned off or reset, it will remain in the flash load
cycle and the upload can be re-attempted at step 7.
Chapter 5 - Warranty, Service and Tech Support
77