Hmmm…ss7 and voip very interesting….Megaco does get you there, but vendors have figured out other ways to do it also with other protocols SS8, Cisco, Nuera etc…
Are you wondering how to transport ss7 over IP? There are many issues on that front, such as variant to variant interworking, parameter transparency. etc…
look around on stuff re SCTP, M3UA, SUA etc…
Go to the sigtran working group in the IETF.
http://www.ietf.org/html.charters/sigtran-charter.html
Iliana –
MGC to GK interworking would depend on the MGC, if it supported H.323 or not. It would have to use H323 unless you had some sort of protocol converter.