A LIDB contains subscriber information such as a service profile, 10-digit line number, service provider ID, equipment indicator, and billing specifications. The line information is used by other service providers to decide how to respond to a call. For example, line information can tell service providers about the end user; e.g., whether to block certain calls, allow collect calls, allow international calls, validate account information, etc.

Here is an example of how our service works when your Operator Service Provider (OSP) receives a call to be billed to a calling card number:

1. A query is launched to a TNS Signaling Transfer Point (STP).
2. The TNS STP performs a global title translation (GTT) and determines the database to validate the card number.
3. The STP routes the query to the appropriate database.
4. The database returns a response that contains validation information.
5. The response is analyzed and it is determined how to treat the call.