CSL - Customer Switch Location

Identifies the CLLI Code (Common Language Location Identifier) An 11-digit code that an ILEC assigns to acarrier’s location to designate the Central Office or area served by a Central Office.Characters 5 and 6 are the state code, 7 and 8 are the Central Office name, and 9through 11 specify equipment type. CLLI is a trademark of Telcordia. of the customer's switch.

NOTE 1: Identifies the customer’s Telcordia™ LERG™ Routing Guide based ACTUAL SW ID for Local Interconnection or Wireless Trunks.

NOTE 2: Identifies the customer’s switch CLLI Code to support SS7 trunk Denotes a communications path connecting two switching systems in a network, used in the establishment of an end-to-end connection. ordering, e.g., IXC Inter-Exchange Carrier.

NOTE 3: The format and structure of this field is defined in the ANSI approved standard, ATIS-0300253, Identification of Location Entities for Information Exchange or by COMMON LANGUAGE in BR-795-402-100. A brief summary of the format can be found in ATIS-0404000, Section 2.14.1.

VALID ENTRIES:

Valid CLLI Code

NOTE 1: Valid CLLI Codes are maintained by Telcordia Technologies. .

USAGE: This field is conditional.

NOTE 1: Required when the TCIC field is populated and the ACT field on the ASR Access Service Request Form is “N”.

NOTE 2: Prohibited when the ACT field on the ASR Form is “D”, “M” or “R”.

NOTE 3: Otherwise optional.

DATA CHARACTERISTICS: 11 alpha/numeric characters

EXAMPLES: C H C G I L W R D S 0