Summary

Compatibility and interoperability are key aspects of interconnection between the various national and international network operators. Consequently, it is important to aim at assuring the compatibility of user terminal equipment among the respective networks, and the interoperability of the various network entities with regard to bearer aspect and service compatibility. To help achieve this objective, Recommendation ITU-T Q.3940 describes a series of tests that could be performed as part of the interconnection process before live traffic is present.