I have a client who uses Verizon as a T1 provider. they recently switched out the T1 hardware with a new Netvanta 3448.
I assume that "They" above is Verizon, correct?
This client uses a SonicWall VPN router. Verizon has not been able to work with them to configure the Adtran 3448 to work with the Sonic Wall or any other (Dlink/Linksys) type of router. (they tried 2 other routers) What settings need to be changed on the Adtran so it will work with the SonicWall? Verizon has been no help at all, saying they should use the Adtran Router functionality. They want/need the VPN functionality of the SonicWall and are happy with it.
If Verizon owns and maintains the 3448 and doesn't allow customer access to it, they should have given the customer four pieces of information:
LAN subnet mask
The Sonicwall should be configured to use one of the unused addresses within the LAN subnet.
Its subnet mask should be configured to match that given by Verizon.
Its default gateway or default route should match that provided by Verizon
It should be set to use the DNS servers provided by Verizon.
These settings should be the same as on the old T1 hardware, unless Verizon had a good reason to change them.
If Verizon is unable to give you the four items above, or if they've configured the 3448 for NAT or DHCP, insist politely but firmly that they not do those things and provide the information needed for you to connect your equipment. This is T1 service and not residential DSL. Verizon should not be playing those tricks.
If the customer owns and has access to the 3448, post its configuration here.
I went ahead and flagged the "Correct Answer" on this post to make it more visible and help other members of the community find solutions more easily. If you don't feel like the answer I marked was correct, feel free to come back to this post to unmark it and select another in its place with the applicable buttons. If you have any additional information on this that others may benefit from, please come back to this post to provide an update. If you still need assistance, we would be more than happy to continue working with you on this - just let us know in a reply.