Identifies a particular CCS link's functionality.
NOTE 1: This entry must be identical to the LT field entry on the Trunking Form.
VALID ENTRIES:
A = Access Link
B = Bridge Link
D = Diagonal link
E = Extension Link
F = Fully Associated Link
USAGE: This field is conditional.
NOTE 1: Required on all DLRs when provided on the ASR Form, otherwise prohibited.
DATA CHARACTERISTICS: 1 alpha character
EXAMPLE: A