If you want to turn the internal crap off on a Verizon Westell A90
(also 7500) modem so that you can use it with an existing wireless router...
Login to the unit with admin:password, you will be asked to change
the password right away... make it admin:admin or whatever..
Choose WIRELESS SETTINGS and disable it.
Choose MY NETWORK... NETWORK CONNECTIONS... under ACTION click
the icon to edit DSL BROADBAND CONNECTION... change the VC1 CONFIGURATION settings for PROTOCOL and BRIDGE MODE both to "BRIDGE". This will probably reset the modem.
Choose MY NETWORK... NETWORK CONNECTIONS... LAN... then uncheck
ENABLE DHCP SERVER.
After you hit apply, connect the existing network router WAN port to
the E1-UPLINK port on the A90. You are done. The INTERNET light on the modem will now be dark as an indication it is in bridging mode.
Dont forget to configure your router to use PPPoE using the main
account username and password.