Summary

Voice and voiceband traffic in international networks has traditionally been transported by circuit switched systems and equipment. With the advent of the networks optimized for the transport of Internet Protocol (IP), and as a result of its considerable growth and pervasive nature, more and more voice traffic is expected to be carried over IP networks.

Given that voice and voiceband services remain a significant part of telecommunications, there is a need to ensure a high quality of service for voice carried in part, or wholly, via IP. This Recommendation defines interfaces and functionality for equipment that interconnect GSTN networks at the TDM interface and networks optimized for the transport of IP, such that they will provide the degree of voice quality and interoperability required.