It sounds like a bad cable pair or other physical layer issue. Usually the tech will test and repair with the CO with little input from the user. When they're done, they turn it back over to the user to verify everything is working correctly.
After applying all the RME 3.5 updates (IDU v.9 was the last), I reentered the WRITE community string and updated the inventory. That resolved the problem for me.
You need a router on the inside to bounce the packets off of. A pix will not route packets from a vpn tunnel (your client) to another tunnel (your lan to lan).
