Circuit id

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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.

[edit] Circuit ID Formats per Carrier

Qwest http://www.qwest.com/wholesale/systems/WebHelp/reference/circuit_id_formats_guide.htm Serial 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 used

AT&T

Southwestern Bell

MCI Worldcom

Sprint

Verizon

Level-3