Identifies the Alternate Exchange Customer (AEC) has opted to provide their own Dedicated Network Access Link (DNAL) to terminate in a designated port location at the AP's Signal Transfer Point (STP). (SS7 Unbundled)
VALID ENTRIES:
PT = Port Termination for AEC provided DNAL
USAGE: This field is conditional.
NOTE 1: Required when ordering Unbundled SS7, otherwise prohibited.
DATA CHARACTERISTICS: 2 alpha characters
EXAMPLE: P T