LIDB Access Routing Guide (LARG) serves as a centralized resource for routing information related to the Line Information Database (LIDB). The LIDB stores subscriber data used to support services like calling cards, collect calls and bill-to-third-party calls, also known as Alternate Billing Services.

The LARG provides the necessary data to administer and maintain Global Title Translation (GTT) tables within a Signal Transfer Point (STP): the telecom "traffic controller" that routes signaling messages across the network. These GTT tables help ensure accurate routing of queries to the correct data sources.

The guide also identifies the responsible Signaling Network Control Center (SNCC), the group managing signaling operations and network reliability, the appropriate LIDB provider the inter-network route effective date and the necessary capability code or pseudo point code for routing setup.

The LARG follows a format similar to the Calling Name Access Routing Guide (CNARG), which supports routing of queries to database systems that return Caller ID name information (Calling Name). A text file that defines data fields, provides contact information, etc., is provided with each issue.

The LARG is a valuable resource for:

• Alternate billing service providers
• Database maintenance staff
• Users needing to route Signaling System No. 7 (SS7) queries to Line Information Databases (LIDBs)

Benefits of the LARG:

• Increasing accuracy of queries
• Improving GTT performance
• Critical source of data to populate Global Title Translation Tables within the Signal Transfer Point (STP) of the network that saves time, increases accuracy and improves performance Reduces misrouted or failed calls for third-party billing, collect calls and calling card calls
• Recovers revenues and reduces customer complaints