Rebooting a Open Networks 501R ADSL router via the telnet interface
Open command prompt window:
enter (replace XXX.XXX.XXX.XXX with your desired IP address or hostname of the router to control):
telnet XXX.XXX.XXX.XXX
You will be presented with the login screen:
Enter approriate username and password and press enter. You will be repsented with the Main Menu:
Use the cursor key down to go to [REBOOT]
Then the cursor key right. You will be presented with this screen:
Enter Y. then the system will reboot.
After a while you should be able to log in again.
See here for some original Open Networks 501R docs: http://support.blue.net.au/downloads/open501r/