Had to dig out the Manual for the ISDN LAN Modem today. Config got hosed somehow over night, then I hosed it further.
After moving several boxes from the garage to the attic (which I sorely needed to do anyway), and checking each one for the manual, I found it in the computer room. Grrr.
So, if you ever need to reset a 3COM ISDN Office Connect LAN Modem, ask, because I now know how to reset it without logging on via the web page interface. Joy!