"ITU-T H.248 is a ""transport technology independent"" or ""bearer-independent"" signalling protocol. This means it may be carried over multiple@ different transport technologies. There is no tight coupling to a single@ specific underlying protocol stack. Such a protocol design satisfies multiple protocol engineering requirements like: a) the signalling protocol is independent of network infrastructure@ b) the signalling protocol may be used in present network infrastructures that are very heterogeneous concerning deployed bearer technologies@ and c) the signalling protocol can be used in network infrastructures that evolve over time. The choice of a particular transport technology@ either due to an initial negotiation process or due to a later change procedure@ may benefit from correspondent signalling elements. This Recommendation provides functionality for the indication and negotiation of an ITU-T H.248 transport mode (see clause 3.1.1)."