Hi,
It’s a long time since I worked with SCCP but as I remember ( for IN services at least)
A certain SSN number is used for a specific service between two exchanges or in a network.
Hence a preference might be the thing to use. e.g
in a capture from a specific place the SSN is known ?
Best regards
Anders
>The SSN is only available with the SCCP Connection
Request and is required
>to know what type the payload is. There is
only one SSN for a connection.
>I was trying to say that if the SCCP CR is for SSN=142
then we know what
>dissector is required for the payload (RANAP).
Any subsequent SCCP messages
>in the connection will also contain a RANAP
payload (if any) and I am
>assuming that means for the conversation.
>For example SSN=142 would imply RANAP, SSN=252
would imply IOS, SSN=254
>could be GSM BSSAP or IS-634 or IOS.
>I suppose you could rely on heuristics but I have
found that doesn't work
>all of the time.
