The present document 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.
The present document covers the use of connectionless functions (class 0 and class 1) and connection-oriented functions
(class 2, excluding embedded connection set-up).
NOTE: The SCCP gateway functions are relay functions that bridge two Message Transfer Part (MTP) networks.
The present document 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, the present document is based on the assumption that the Message Transfer
Part (MTP) specified in EN 300 008-1 [1] and EN 301 004-1 [2] support the SCCP.
LUDT(S) messages and associated procedures need not be provided. If they are provided they shall be provided
according to the ITU-T recommendations endorsed by the present document, unless modified herein.