Identifies the CFA as a provider carrier system.
VALID ENTRIES:
Y = Provider carrier system
USAGE: This field is conditional.
NOTE 1: Required when the first position of the REQTYP field on the ASR Form is “A”, “L”, “M” or “W” and the CFA is a provider carrier system.
NOTE 2: Required when the first position of the REQTYP field on the ASR Form is “E”, “S”, “V” or “X”, the CFA is a provider carrier system and the NC code does not specify a virtual concatenation service.
NOTE 3: Otherwise prohibited.
DATA CHARACTERISTICS: 1 alpha character
EXAMPLE: Y