Identifies the first circuit or segment as a unique number and each additional circuit or circuit segment as a unique number.
NOTE 1: When the quantity is equal to one (1) and the VCAT Form is utilized, the REF NUM value will be “0001” and is associated with the service specific form.
NOTE 2: The REF NUM shown on the ACI/ARI Form must match the REF NUM on this form for those circuits where the customer is providing assignment of facilities and/or equipment.
USAGE: This field is required.
DATA CHARACTERISTICS: 4 numeric characters.
EXAMPLE: 0 0 2 3