© Microhard Systems Inc.
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Appendix G: Firmware Recovery Procedure
In event that your unit becomes unresponsive it may be required to perform a firmware recovery procedure
outlined below:
1. Download and save firmware file in a local folder, for example C:\;
2. Separate the PC from the network and set IP to static:
192.168.1.1
255.255.255.0
3. Connect PC Ethernet port to the Ethernet port of the modem to be recovered
4. Start a ping on the PC
C:\>ping 192.168.1.39 -t
Pinging 192.168.1.39 with 32 bytes of data:
Request timed out.
Request timed out.
5. Power cycle modem while pressing and holding CFG(Config) button;
6. Release the CFG button when ping responded:
C:\>ping 192.168.1.39 -t
Pinging 192.168.1.39 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Reply from 192.168.1.39: bytes=32 time<1ms TTL=128
Reply from 192.168.1.39: bytes=32 time<1ms TTL=128
Reply from 192.168.1.39: bytes=32 time<1ms TTL=128
Reply from 192.168.1.39: bytes=32 time<1ms TTL=128
Note, If ping responds as shown above, then you can probably recover the unit, please proceed.
Otherwise, send the unit back for RMA.
7. Now use TFTP to push firmware file into the corrupted unit:
For example, on Windows XP using following command line:
tftp -i 192.168.1.39 put IPn4G-v1_1_0-r1084-16.bin (or the file saved).
8. Wait until above command to successfully transfered the image, similar message should show
Transfer successful: xxxxxxx bytes in 5 seconds, nnnnnnn bytes/s, note the number might change for
different firmware file
Note, if you see message above, the unit will re-flash itself and reboot, otherwise call for help or send back
for RMA.
9. Wait for the unit to recover and reboot.
