Identifies the PON of the Access Service Request which has the TQ attached (Master ASR ).
NOTE 1: When the TQ field is "A" the MPON field must contain the PON of the Master ASR, the RPON field may be populated for relating both the "N" and "D" Access Service Requests if associated with this request.
USAGE: This field is optional.
DATA CHARACTERISTICS: 16 alpha/numeric characters
EXAMPLES: V M S 1 2 3 4 5 6 7 8