I have a Cisco 1720 router. I think I installed the wrong configuration files or I typed in a sentex error during reconfiguration and now all I can see on the screen is garbaled symbols. For example: xðxþ?xø?xø?xø???xþxøøø?øxøø??ø?øøxøø?ø??ø?x?ø?øø??xà?ø?øøøøxøø??ø??øxøøøø??xø?xø?xø?xðxþxþøø?xþ???ø??ø??ø??ø??øxà?øø?xà What can I do?

Question:<br> We've recently changed <a href="http://www.3anetwork.com/cisco-c2951-vsec-sre/k9-price_p267.html"><b>C2951-VSEC </b></a>data line providers and now have some Cisco 877 routers we'd like to reconfigure and use at other sites. Although we own these, they were configured by our old data line providers, I'm having a hard time of resetting them to factory defaults and am after some advice.<br> The simple, hold down the reset button until it restarts does not work.<br> If I press the reset button within 5 seconds of power up to load the default rom image, I get the below:<br> System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE<br> Technical Support: http://www.cisco.com/techsupport<br> Copyright (c) 2006 by cisco Systems, Inc.<br> C870 series (Board ID: 1-148) platform with 131072 Kbytes of main memory<br> Booting flash:c870-advipservicesk9-mz.124-24.T.bin<br> Error opening: flash:c870-advipservicesk9-mz.124-24.T.bin<br> System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE<br> Technical Support: http://www.cisco.com/techsupport<br> Copyright (c) 2006 by cisco Systems, Inc.<br> C870 series (Board ID: 1-148) platform with 131072 Kbytes of main memory<br> Booting flash:/c870-advsecurityk9-mz.124-24.T6.bin<br> Self decompressing the image : ############################################################################## [OK]<br> I assume from this the required bin has either been removed, renamed or overwritten.<br> As soon as the router boots it requires a password and I dont have the password to be able ftp files in and out of it.<br> Hope you guys can help.<br> Answer: <br> this should work indeed.<br> take a look here:http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080174a34.shtml <a href="http://www.3anetwork.com/cisco-cisco3925/k9-price_p284.html"><b>Cisco 3925</b></a>

TheCisco 3925 router is part of a family of networking equipment produced byCisco, which has been a network equipment giant for many years. Used 3925routers are available on the Internet at reasonable prices, so acquiring one isnot difficult. However, if the password is unknown or lost, reconfiguration isimpossible until the password is reset or recovered.

Cisco has built in aprocedure for rescuing lost or forgotten passwords or entering new passwords.
ThingsYou'll Need: Serial to RJ-45 cable;Terminal emulation software
Instructions
1.Connect your computer to the router with the blue serial-to-RJ-45 cable thatcame with the router.
The 9-pin D-shell end connects to your computer's serialport, while the RJ-45 end connects to the console jack on the router.
The RJ-45end resembles a slightly larger telephone jack connector.

2.Turn on your computer and establish a terminal session to the 3925. You can use any terminal emulator, and many are freely available on the Internet.
Configure the session settings as follows:9600baud8data bitsNoparity1stop nonflowering controllable router's power cable into an electrical outlet, and as the 3925 boots, you should see the Cisco boot messages.

If you don't see any output on your computer's terminal session, check your settings on the session and restart itif necessary.
Press "Break" within 30 seconds of powering on the router to enter rommon (rom monitor) mode.

3.Type "confreg 0x2142" and press "Enter" at the "rommon1>" prompt. This will cause the router to boot from its internal flashmemory without loading the configuration into memory.
At the following"rommon 2>" prompt, type "reset" and press"Enter."
This will cause the router to reload and ignore thepreviously saved configuration file.

4.Respond "no" and press "Enter" when prompted for responsesto enter the initial dialog or basic management setup.
Type "enable"and press "Enter" at the following "Router>" prompt.This will put you into enable mode and display the "Router#" prompts.Copy the non-volatile memory into memory with the "copy start up-config running-config" command, followed by the "Enter" key. Type"sho run" at the prompt and press "Enter" to display the current configuration, including the passwords, some of which may be encrypted.

5.Type "config t" at the prompt and press "Enter." At the"Router(config)#" prompt, type "enable secret <pswd>"-- where "pswd" is the password -- and press "Enter." Atthis point, your enable password is reset. Press "Ctrl" +"z" to return to the "Router#" prompt.

6.Type "config t" at the "Router#" prompts and presses"Enter." At the "Router(config)#" prompt, type"config-register 0x02102" and press "Enter" to reset theboot register to its normal setting. Press "Ctrl" + "z" toleave configuration mode. Type "copy running-config startup-config"and press "Enter" to save your changes. Reboot the router and youshould be able to login with your password.