This Recommendation describes the real-time multimedia service testing framework at the user-tonetwork interface (UNI) in next generation networks (NGNs). This Recommendation defines the preparation for NGN multimedia service testing@ physical configuration@ test scenarios and test report production. The real-time multimedia service defined in this Recommendation covers services including voice and video communication@ video conferencing and data sharing. Specifically@ this Recommendation describes video communication service testing specifications. In the future@ other multimedia services will be covered. The test check sheets described in clause 7.1 are useful for NGN operators@ service providers and vendors when testing their services or products.