Signalling Connection Control Part: Difference between revisions

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Routing facilities beyond MTP-3: link MTP, Point code and others
Routing facilities beyond MTP: GTT is quite different than DNS, closer to NSAP addressing
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Although [[Message Transfer Part|MTP]] provides routing capabilities based upon the [[Point Code]], SCCP allows routing using a [[Point Code]] and [[Subsystem number]] or a [[Global Title]].
 
A Point Code is used to address a particular node on the network, whereas a [[Subsystem number]] addresses a specific application available on that node. SCCP employs a process called [[Global Title Translation]] (which is similar to [[Domain name system|DNS]] resolution in [[Internet Protocol|IP]] networks) to determine [[Point Code]]s from [[Global Title]]s so as to instruct [[Message Transfer Part|MTP]] on where to route messages.
 
SCCP messages contain parameters which describe the type of addressing used, and how the message should be routed: