Guide to Circuit ID Formats

Serial Number Format

• Prefix: 1-2 alphanumeric characters. This is an optional field.

• Service Code & Modifier: 2-4 alphabetic characters (usually 4). This is a required field.

• Serial Number: 1-6 digits. This is a required field.

• Suffix: 3 character suffix to the serial number may be required (rarely used).

• CO (Company) Code: 2-4 alphabetic characters (usually NW, MS, or PN). This is a required field.

• Segment: 1-3 alphanumeric characters. optional for non-multi-point circuits. multi-point segments map to Circuit End Location, e.g. CLK1 = A, CLK2 = B

A Billing Telephone Number (BTN) cannot be used for opening a Trouble Report. The Serial Number Circuit Format must be used.

Telephone Number Format

• Prefix: alphanumeric characters. required if it exists (not all telephone number circuits have a prefix)

• Service Code & Modifier: 2-4 alphabetic characters (usually 4); This is a required field when specifying a non-DSL telephone numbered circuit.

• 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

Carrier Facility Format

• Channel Group Number: 1-5 alphanumeric characters. This is a required field.

• Facility Type: 1-6 alphanumeric characters. This is a required field. Examples: T1, T1F, T1U, T1UZF, T1Z, T1ZF, T3

• A CLLI Code: 8 or 11 alphanumeric characters. This is a required field.

• Z CLLI Code: 8 or 11 alphanumeric characters. This is a required field.

All 4 of the above components are required

Message Trunk Format

• Trunk Number: 1-4 alphanumeric characters. This is a required field.

• Traffic Class: 1-2 alphanumeric characters. This is a required field. A hyphen may be allowed

• Office Class: 1-2 alphanumeric characters. This is a required field. A hyphen may be allowed

A separator is not used between the Traffic Class and Office Class

• Traffic Use Code: 2 alphanumeric characters. This is a required field. A hyphen may be allowed. No separator between Office class and Traffic Use Code

• Traffic Modifier: 1-7 alphanumeric characters. This is an optional field. No separator between Traffic Use Code and Traffic Modifier

• A CLLI Code: 8 or 11 alphanumeric characters. This is a required field.

• Pulse & Direction: 2 alphanumeric characters. This is a required field.

• Z CLLI Code: 8 or 11 alphanumeric characters. This is a required field.