Summary

Recommendation ITU-T Q.3645 defines the protocol at the interface between two distributed ITU-T E.164 number mapping (ENUM) servers (DES) of a distributed ENUM system in support of IP multimedia core network subsystem (IMS) interconnection. Based on the functions and signalling requirements defined in Recommendation ITU‑T Q.3643, this Recommendation provides the reference model, procedures, protocol and message specification for the interface between two DES.