scope:

This standard applies to telecommunications charge card (aka "calling card") and billed number screening validation messages for use within the North American telecommunications interchange environment.

The use of validation systems and networks also involves appropriate agreements between card issuers and service providers. Additionally card issuers and service provider agreements must comply with legal and regulatory requirements. Such agreements and requirements are beyond the scope of this standard.

Purpose

This standard describes information used within the validation process at a conceptual level and does not imply the use of specific network hardware components or signaling protocols. Certain parts of this standard will impact the protocols used to encode and transmit the information. These messages comply with existing American National Standards (ANSI Standards) and International Telecommunications Union - Telecommunications Standardization Sector recommendations.