This Recommendation provides the protocol for Generic Addressing and Transport (GAT). GAT is a protocol for exchanging Application Protocol Data Units (APDUs) between service provision points that may be located within the same network, between networks, or between a terminal and a network. The protocol is applicable to the signalling network, and may be used in conjunction with the Digital Subscriber Signalling System No. 1 (DSS1) protocol, Digital Subscriber Signalling System No. 2 (DSS2) protocol, Signalling System No. 7 (SS No. 7), and is applicable at interfaces where those protocols are applicable.