Identifies a code assigned to a group of signaling link(s) of a common channel signaling link set.
USAGE: This field is conditional.
NOTE 1: Optional when the PCACT field is populated, the ACT field on the ASR Form is āCā and the TSC field on the ASR Form is populated, otherwise prohibited.
DATA CHARACTERISTICS: 8 alpha/numeric characters
EXAMPLE: A C 1 2 3 4 5 6