Identifies the circuit number or range of circuit numbers used by the customer for the T1 Transport involved.
NOTE 1: CKR1 is used by the customer as a cross reference to the provider circuit ID(s) and in many cases to identify the customer's end-to-end service.
USAGE: This field is conditional.
NOTE 1: Optional when the first position of the LTP field on the ASR Form is “B”, “C”, “D”, “E”, “L”, “M”, “P” or “Q” and the ACT field on the ASR Form is “N”, “C” or “D”, otherwise prohibited.
DATA CHARACTERISTICS: 40 alpha/numeric characters
EXAMPLE: L 0 0 0 2 - 0 0 2 4