Question: What is the default login username and password for the web configuration interface of the GXV3140?
Answer:

The default login name for the administrator is “admin”, the default administrator password is also set to ”admin.” If you have changed the login password, you must use it to login to the web interface. In this case, if you forget the password, you can factory reset the unit to restore the default user login settings.
The default login name for end-users is “user”, the default user password is set to ”123”. When you log in as an end-user, you are only able to view the Status, Advanced and Maintenance page. The end-user will not be able to modify the Account page.