MTP2 User Adaptation
MTP2 User Adaptation (M2UA) provides internetworking functions between MTP3 devices. The gateway is between an IP-based MTP3 SP (softswitch) and an SS7 MTP SP (STP) or possibly between two SS7 SPs interconnected by an IP network. The signaling gateways in the M2UA scenarios are transparent to the SS7 addressing; they act as an internetworking function only, not a signaling endpoint.
- RFC 3331