Password recovery on USR 8550 ADSL router 2

[jcpierri]

Hi All,

I have a USRobotics 8550 ADSL Router whose password is lost. I already try the default password (12345) and some others, but none worked.

Now I have a serial cable attached to the console port, but it still asks PASSWORD: and nothing I type works.

Does anybody know how to recover its current password or how to return it to the default factory setting?

Thanks

 

[msxmaniac]

Have you discovered any solution?
I have same problem!
And I can't get any help conulting USRobotics in my country (Brasil)!

 

[manarth]

US Robotics say:
"Attention: Take note of your password.

Note: If you forget your password, your modem will not be usable. Resetting your modem will not correct the issue. "

http://www.usr.com/support/product-template.asp?prod=8550

then see the FAQ.


From a physical point of view, the password is probably stored on an EPROM or EEPROM chip "Erasable Programmable ROM" and "Electrically EPROM".

EPROM chips are normally wiped blank by exposing them to ultra violet light, EEPROM chips are wiped / changed by applying voltage across the appropriate pins...of course, this means you have to identify the appropriate chip on the router's board, identify the chip type, then work from there.

Either way, be prepared to have to put your electronic head on, 'cos you aint gonna do it with a piece of software

Good luck! <marc>[ul]help us help![li]please provide feedback on what works / doesn't[/li][li]not sure where to start? click here: faq581-3339[/li][/sup][/ul][/sup]

 

[jcpierri]

Hi again,

I finaly found a way to restore this router to its factory default.
It is pretty simple after you know how to do, and was pretty hard to figure it out without any help from USRobotics.

First you have to gain access to the boot loader following this steps:

a) Attach a serial cable to the console serial port and open a VT100 emulator (like Minicom on Linux or Hyperterm on Windows).
b) Set it to 9600 BPS, no parity, 8 bits, 1 stop, no flow control of any kind.
c) Ensure that you are seeing the prompt asking for "PASSWORD:" as well as all previous messages issued during the boot process.
d) Power-off your router.
e) Press and HOLD PRESSED the space bar, so it keeps sending spaces (ASCII 0x20) one after another.
f) Power-on your router.
g) After you see a message like "Aborted", just after the "PP flash boot" line, and the spaces you're entering start printing on screen you can then release the space bar you pressed in step "e". Now press the <ENTER> key some times so you can see the console's prompt (that "]" sign).

Now that you are inside your hardware, with no firmware running, proceed with:

h) Get the right firmware file for your router (I used the "T60M10411_13_R3.1.0.bin") from the USRobotics support page.
i) Enter the command "xmodem fast" at router's console.
j) Change your emulator's baudrate to 38400 (or else it will take a week to complete the transfer) and send the ".bin" file you got int step "h" using Xmodem protocol. After the transfer has finished you will see a message saying "xmodem fast Image relocated - type quit to boot".
k) Change your emulator's baudrate back to 9600 and press <ENTER> until you see the console's prompt again.
l) Enter the command "quit" and wait until the boot process of your downloaded image finishes.
m) Logon to your router's new firmware using its default password (12345).
n) Enter the command "config save" and then "flashfs update".
o) Enter the command "restart".

At this point you should have (like I do now) your router with its configuration reseted to the default factory settings.

Regards,

J. C. Pierri