So My office in DC was closed. I am now moved to Virginia and working in the SS7 NOC. This is some cool stuff. I may share some info as i get it.
What you guys know as AIN is just a part of SS7. http://www.protocols.com/pbook/ss7.htm
SS7 was implemented before the OSI model so it doesn't fit to well in it. But it is some really cool stuff. Some of the things it does.
Track roaming in wireless networks, Interface to VOIP networks. Make local number protability possible lnps, and wireless number portability possible.
It is also what makes Caller ID, *69, call block and all that work. It is how they killed blue boxes. Any one intrested in notes?