scope:

This first part of ETS 300 009 defines the Signalling Connection Control Part (SCCP) signalling protocol of Signalling System No.7 for use in and between international relay points and gateways and, optionally, in public networks. This ETS covers the use of connectionless functions (Class 0 and Class 1) and connection-oriented functions (Class 2, including embedded connection setup). NOTE: The SCCP gateway functions are relay functions that bridge two Message Transfer Part (MTP) networks. This ETS is applicable to the international network and does not intend to restrict national networks. However, to facilitate SCCP interworking, its adoption within national networks is recommended. Concerning the interconnection of SCCPs, this ETS is based on the assumption that the Message Transfer Part (MTP) specified in ETS 300 008 [1] supports the SCCP.