Circuit ID
A circuit ID is a company-specific identifier assigned to a data or voice network between two locations, usually local telephone exchanges. The circuit is then leased to a customer by that ID. A subscriber having an issue with a circuit contacts the Controlling Local Exchange Carrier (Controlling LEC) telecommunications provider to provide this circuit ID for action on the designated circuit.
Telecom Circuit ID formats
The LEC circuit IDs are based on Telcordia Technologies' Common Language Coding. At one time, the abbreviations were meaningful (for example, HC for high capacity) but the complexity of the business no longer allows for it.
Carrier Facility format: AAAAA/BBBBBB/CCCCCCCCCCC/DDDDDDDDDDD
A Prefix: 3-5 Alphanumeric characters. Required.
B Facility Type: 2–6 Alphanumeric characters. Required.
C A CLLI Code: 8 or 11 alphanumeric characters. This is a Required Field.
D Z CLLI Code: 8 or 11 alphanumeric characters. This is a Required Field.
Example:
HN101/T3U/MPLSMNDT000/GLVYMNORIII is an unframed T3 circuit between two locations in Minnesota.