Summary

Recommendation ITU-T Q. 4003.3 v.1 (2016) is part 3 of the testing specifications for HOLD service implemented on IP multimedia subsystem (IMS) basis on the user side. The Recommendation specifies the test suite structure and test purposes (TSS&TP) which can be used for testing against the Recommendation ITU-T Q.3619 v.1, "Communication HOLD using IP multimedia core network subsystem – Protocol specification".

The version number, v.1, indicates that this is version one of Recommendation ITU-T Q.4003.3 and that it relates to Release 10 of the relevant 3GPP/ETSI standard.