As you know, a Cisco router is configured using a command line, sometimes described as the IOS interface. A Nortel router uses a GUI interface program that runs on your PC. It's called Site Manager, and the firmware is now known as BayRS. The Site Manager software has become reliable in recent times, but make sure that you have later releases of code in your routers. In "olden times" the particular Site Manager releases were required for a particular BayRS, so beware.
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