FLASH WITHOUT MAX232 FOR LOCKED FIRMWARE
Special Thanks go to
Download and install snmp
Set the ip of your pc to
and def.gateway to
Llook up the hfc mac of
your cable modem by going to
and convert it to
integer as follows: for example if it is
take the last 4 values and remove the colons
Start windows calculator
(calc.exe) and select scientific from the view
Select Hex and enter the
value 1A02CD14, now select Dec and note down the
integer value (436391188 )
Start your tftp server or
use tftpd32.exe located in the
Files And Video
Section.also make sure
the .bit file of your modem it located in the tftp
root directory of your TFTP client.
Open a dos cmd window and
navigate to where you installed snmpset example-
snmpset -v2c -c public
192.168.100.1 126.96.36.199.4.1.1188.8.131.52.1.18.0 i
436391188-that's an example use the value you
calculated afer i.
observe which file the
modem tries to tftp if should get sb****.bit and if
write your modem should reboot.
.Once modem has rebooted
keep ip the same
Close your tftp server as
cmFirm has it`s own
Check your settings are
the same but first make sure the firmware you want
to flash is located in the tftp root as i explained
earlier then click start.
Don't click anything
until the modem has uploaded from cmFirm and
When rebooted goto
you should notice you now have the hack tab well
done and enjoy!
Note this is for SB3100 ,
SB4100 and SB4200 modems only!
The Sb5100 upwards are not
capable of this firmware change .