Signaling Connection and Control Part, from ITU-T recommendation Q.713, is the routing protocol for Signalling System 7 networks. Its function is similar to that of IP on the Internet, given a origination and destination address SCCP delivers the message across multiple hops to the destination machine. SCCP uses two forms of addresses Point Code and Sub System Number or Global Titles.
| SS7 protocols by OSI layer | |
| Application | INAP, MAP, IS-41... TCAP, CAP, ISUP, ... |
|---|---|
| Network | MTP Level 3 + SCCP |
| Data link | MTP Level 2 |
| Physical | MTP Level 1 |
Point Codes identify a machine and Sub System Numbers identify different services within a machine. Global Titles are translated at a into PC and SSNs at a Signal Transfer Point.