This article explains how to take a backup of a Cisco device using the putty terminal emulation program. You can download putty from here

Open putty as administrator.

Connect a console cable to your PC and connect via Putty to the Cisco device. Make sure you enable session logging (this output is sent to a text file and makes your backup).

Enter enable mode “en” and enter the command “terminal length 0

Then issue the command “sh run

Once the output from the above command has finished displaying you should have a text file on the desktop (called cisco-backup in this example).

You can open this in notepad and view the configuration.  This text file is your backup.

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