SIGTRAN/SS7oIP – Backhaul or Peer-to-Peer?
Backhaul is used when the customer needs to connect to the IP network using the existing SS7 network. It uses M2UA, which transports MTP2-User signaling (such as MTP-3) over IP, using SCTP. It is used between a Signaling Gateway and a Media Gateway Controller in VoIP networks. Peer-to-Peer is used when the customer replaces the entire SS7 network with the IP network or where no SS7 network is available. It uses M2PA, which supports the transport of MTP-3 signaling over IP using SCTP. It is used between the SS7 Signaling Points which use MTP3, as well as an IP network to connect the two points. M2PA provides the same services to MTP3 in IP network as MTP2 does in SS7 Network. Backhaul is the most requested option.