Mobile entities
The Internetworking Function (IWF)
The internetworking function is a functional entity associated with
The IWF provides the functionality necessary to allow internet-
working between a PLMN and the fixed networks.
The functions of the IWF depend on the services and the type
The IWF is required to convert the protocols used in the PLMN to
those used in the appropriate fixed network.
The IWF may have no functionality where the service
implementation in the PLMN is directly compatible with that at the