MGCs and MGs employ different methods to control the MG internal connections. An MG may save transcoding resources by autonomously connecting the terminations in the same MG but different contexts directly to each other. However, in some special applications (e.g., test) this autonomous behaviour may not be desired. Not all MGs support this autonomous behaviour, nor do they all support terminations being connected internally. Such a mix of behaviour leads to interoperability issues.
This Recommendation contains a H.248 package to determine the MG internal connection capability and to set the appropriate MG internal connection behaviour where necessary.