Chapter 9. Signaling Connection Control Part (SCCP)
The Signaling Connection Control Part (SCCP) is defined in ITU-T Recommendations Q.711-Q.716 [58–63] and for North American markets in ANSI T1.112 [2]. SCCP sits on top of Message Transfer Part 3 (MTP3) in the SS7 protocol stack. The SCCP provides additional network layer functions to provide transfer of noncircuit-related (NCR) signaling information, application management procedures and alternative and more flexible methods of routing.
NOTE
Technically, SCCP can also transfer circuit-related signaling information; however, this is an exception.
As shown in Figure 9-1, the combination of the MTP, and the SCCP is termed the Network Service Part (NSP). The NSP follows the principles of the OSI reference ...
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