Identifies the UREF termination point associated with the physical port being requested on the ASR.
VALID ENTRIES:
A = Associated
NOTE 1: Only one UREF can be designated as the Associated Termination Point.
USAGE: This field is conditional.
NOTE 1: Required when the EVCI field on the ASR Form is “B”, the associated UREF field is populated and it is the termination point associated with this UNI/ENNI, otherwise prohibited.
DATA CHARACTERISTICS: 1 alpha character
EXAMPLE: A