The following table shows how just about everybody likes to get involved in standardizing SS7. SIGTRAN seems a bit lonely in comparison with only the IETF involved (you know them, they are the one with free specs).
ZYTRAX now offers SIGTRAN and SS7 training.
|MTP 2||Q.703||T1.111||EN 300-008-1||SPEC/005||BTNR 146||N/A|
|MTP 3||Q.704||T1.111||EN 300-008-1||SPEC/005||BTNR 146||N/A|
|TUP||Q.721 to Q.725||N/A||N/A||N/A||N/A||N/A|
|ISUP||Q.761 to Q.764||T1.113||EN 300 356-1||SPEC/007||N/A||N/A|
|ISUP SS||Q.730||N/A||EN 300 356-2 to
EN 300 356-19 
|SCCP||Q.711 to Q.714, Q.716||T1.112||ETS 300 009||SPEC/003||BTNR 145||N/A|
|TCAP||Q.771 to Q.775||T1.114||ETS 300 134,
ETS 300 287
|MAP||N/A||N/A||ETS 300 599||N/A||N/A||N/A|
|SCTP||N/A||N/A||N/A||N/A||N/A||RFC 3309 & RFC 4166|
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