Continuing from previous post, let us go to some of SS7 layers, which is adapted from OSI layers:
- Physical <----> MTP Level 1 (Message Transfer Part Level 1)
- Data Link <----> MTP Level 2 (Message Transfer Part Level 2)
- Network <----> MTP Level 3 (Message Transfer Part Level 3) + SCCP (Signaling Connection Control Part)
- Application <---> TCAP (Transaction Capability Application Part), ISUP (ISDN User Part), CAP (Camel Application Part), INAP (Intelligent Network Application Part), MAP (Mobile Application Part), IS-41 (Interim Standard - 41), etc ...
Basically, again what we need to have in mind, in transmitting/receiving data amongst nodes, the nodes has to adhere to this standard to have "same language".
