Identifies the PON of the ASR associated with this trunk group.
USAGE: This field is conditional.
NOTE 1: Required when the Translation Questionnaire is associated with multiple ASRs.
NOTE 2: Prohibited when the TG ACT field is "E", "Z" or not populated.
NOTE 3: Otherwise optional.
DATA CHARACTERISTICS: 16 alpha/numeric characters
EXAMPLE: 8 2 4 Z 9