This document is limited to LNP interconnection tests that are recommended to be performed by network providers (i.e. Cause Code 26N Validation Tests@ Call Through Tests and Default Routing Tests). The purpose of these tests is to provide assurance for the integrity of the interconnected networks. Purpose The purpose of this document is to provide guidance to network providers when they are engaged in interconnection testing for local number portability to ensure that all areas of network integrity and customer service from an interconnection perspective are addressed proactively. This document does not replace or supersede any existing contracts@ tariffs or any other legally binding document.