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LIDB is an acronym for Line Information DataBase, which is used by traditional telephone companies to store and retrieve Caller ID records. Local phone switches, also known as Class 5 switches, use SS7 signaling protocol to query these centralized databases and pass this information during call set up.

Description of LIDB

A Line Information Database (LIDB) is a real-time, transaction-oriented database that contains subscriber information on virtually all working telephone numbers in North America. LIDBs work as central repositories for data storage and retrieval based on 10-digit line numbers. They are nationally accessible and continually audited and updated. LIDBs are available to local, long-distance, wireless, and other service providers. A LIDB contains subscriber information that includes the customer’s name, the identity of the service provider (Account Owner), the customer’s preferred language, and necessary billing information such as the Revenue Accounting Office (RAO).

LIDBs contain various line number and Special Billing Number (SBN) data needed by Operator Services Systems (OSSs) and other Network Elements (NEs) to process and bill calls. The OSS’s Core System (switch) accesses LIDB data to provide originating line (calling number), billed number, and terminating line (called number) management functions. The OSS sends queries to the LIDB to obtain information about the calling, called, and billed numbers associated with the calls it handles. Query messages to, and response messages from, the LIDB consist of a package of one or more Transaction Capabilities Application Part (TCAP) Operation Protocol Data Units (OPDUs).

LIDBs reside on a Service Control Point (SCP) node that provides the network interface for a LIDB to the Common Channel Signaling (CCS)/Signaling System Number 7 (SS7) network. LIDBs are accessible to OSS switches and other network elements in their own and other CCS/SS7 networks. LIDBs are accessible via Local Exchange Carrier (LEC) CCS networks.

LIDBs are currently accessed via CCS SS7 networks via several existing SS7 query types: Calling Card to support Calling Card Service; Billed Number Screening to support Collect and Bill-to-Third-Number Services; Generic Name to support Calling Name Delivery Service; Originating Line Number Screening (OLNS) to support services needing data about the calling line; and GetData, which enables the receipt of any one or more data elements associated with the queried line.

History of LIDB

LIDBs are distributed databases that have been in place for more than 15 years. LIDBs are essentially "line-level" databases for many different types of applications/ purposes.

Development of LIDBs began in the 1980s. This development was driven by the RBOC exit of AT&T’s Billing Validation Application (BVA) platform. LIDBs were first introduced into the network in 1987 primarily for one purpose: validation of alternately billed calls (collect, calling card, and bill to third).

References


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