Nortel BayStack 820 Installation And Reference Manual page 129

To reset the router to factory default conditions and restore the default password:
Use the included null modem cable to connect a workstation to the
1.
router's DB-9 console port
Figure 8-6.
Connect to the CLI using terminal emulation software, such as AniTa.
2.
Set the console speed to a baud rate of 19200 b/s, eight data bits, no
3.
parity, one stop bit (19200, 8, N, 1,) and disable hardware flow control.
If the Telnet application does not allow you to set flow control options, set it
in the Device Manager area of the Windows System settings (accessible from
the Control Panel). After configuring these settings, some applications require
that you close and then restart the session.
Turn the router off and then back on.
4.
In the console window, the message "Loading firmware..." is displayed.
When the message "Ready" is displayed, immediately (within one
5.
second) press [Ctrl] + C.
The router is reset. When the reset is complete, the router returns all settings
to the factory default and the password is "password."
206901-A
(Figure
9633FA
Connecting a Workstation to the Router's DB-9 Console Port
Managing the Router
8-6).
8-7