Base Station System - Media GateWay (BSS-MGW) interface; User plane transport mechanism
The present document specifies the User Plane data transport protocols used between BSSs and the Core Network (MGWs) across the A interface. The main purpose of the present document is the AoIP description, however for the sake of completeness the AoTDM case is described as well.
Figure 1.1: CS core network logical architecture
Note that the present document does not preclude any Core Network Session Control Protocol implementation (BICC or SIP-I).