If this is a point-to-point T1 then both ends should be configured, pretty much, the same. (Except possibly the "Clock Source" under the Network configuration.)
If you look at the manual (https://supportforums.adtran.com/docs/DOC-3507), chapter 5 (page 37) shows the configuration options for both the Network (T1) and the Port (the V.35 interface). You definitely need the PORT configuration to be the same on both ends of the circuit (primarily the Start Channel and Number of Channels). Since this is a point-to-point T1, the Network should be configured the same as well, with the "Clock Source" the only possible exception. If there is no timing on the T1 then one side should be NETWORK and the other INTERNAL. If there is timing on the circuit then they will both be NETWORK.
Hope this helps,
Since we haven't heard anything back from you, I'm going to mark this question as "assumed answered". If you have additional questions feel free to continue the discussion.