What to do if my Nortel 2004 displays 'Invalid ID (1)'?
- JJames FaulknerSep 14, 2025
This message on your Nortel IP Phone means that you've likely entered an incorrect user ID. Please double-check and enter the correct user ID. If the problem persists, the user ID may not be in the Gatekeeper database, in which case you should notify your system administrator.