Does Unity Connection 2.0 support T37 Fax Onramp, I have not been able to find out on the CCO.
Unfortunately, faxing is not supported on Unity Connection 1.X or 2.X; here is the list of limitations:
-No multi-box support (no failover, digital networking, or clustering)
-No FAX integration
-Mid-market scalability (3k users)
-No SMS/SMPP support
-No direct access to file system or database
-No corporate directory integration
-Limited MCS Configurations (fixed drive and partition configurations)
It seems that this features will be added in further releases, you can check the Unity Connection 2.0 Architecture presentations which are available at http://ciscounitytools.com/TOI_CUC201.htm
Hope this helps!