Summary

This Supplement compares different types of methodologies for service modelling to determine their suitability in relation to protocol development for IN in the IN CS-4 time-frame. It also investigates the evolution from SIB based techniques and considers different technologies such as APIs.

This Supplement supplements the information contained within Recommendation Q.65.

Rational

The purpose of this Supplement is to provide a discussion of service modelling aspects related to IN CS‑4.