- Circuit id
A circuit id is a company specific identifier assigned to a data or voice network between two locations. This circuit is then leased to a customer by that id. If and when a subscriber has an issue with a circuit, the subscriber contacts the telecommunications provider to provide this circuit id for action on the designated circuit.
Circuit ID Formats per Carrier
Qwesthttp://www.qwest.com/wholesale/systems/WebHelp/reference/circuit_id_formats_guide.htmSerial Number Format: AA/BBBB/CCCCCCC/DDD/EE/F
*A Prefix: 1-2 alphanumeric characters. Optional.
*B Service Code/Modifier: 2-4 Characters. Required.
*C Serial Number: 1-4 digits. Required
*D Suffix: 3 character suffix to the serial number. May be required. (Rarely used)
*E CO (Company) Code: 2-4 alphabetic characters (NW, MS, PN) Required.
*F Segment: 1-3 alphanumeric characters. Optional for point to point interfaces.Telephone Number Format: AA/BBBB/CCC/DDD/EEEE/FF/G
*A Prefix: Alphanumeric characters. Required if it exists.
*B Service Code & Modifier: 2-4 alphabetic characters. Required for non-DSL numbered circuits.
*C NPA: 3 digits. This is a required field.NXX: 3 digits. This is a required field.Line: 4 digits. This is a required field.Extension: 1-5 alphanumeric characters. This is an optional field. For states: AZ, CO, ID, MT, NM, UT, WY, alphas not accepted; convert D1 to 0001, D2 to 0002, etc.Segment: 1-3 alphanumeric characters. This is an optional field. rarely usedAT&T
Southwestern Bell
MCI Worldcom
Sprint
Verizon
Level-3
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