NFAS Group
For Quad T1 lines, you can set the non-facility associated signaling (NFAS) parameters by clicking Boards==>Lines and double-clicking a device using a quad T1 line. NFAS Details
In the NFAS Group field, enter an integer between 1 and 99. The group number is assigned to all T1 lines belonging to the same NFAS group.