There are differences in how ANSI-TCAP and ITU-TCAP are encoded. These
are used to guess what it is.
Take a look to dissect_tcap() in asn1/tcap/packet-tcap-template.c:157
On Tue, Nov 25, 2008 at 5:53 PM, cco <cristian.constantin@xxxxxxxxx> wrote:
> hi!
>
> how exactly does wireshark distinguish the sua packets that carry an
> ansi tcap payload from the ones that carry an itu one?
>
> for example I am seeing sua packets having the same destination ssn (and
> source ssn) whose payload is decoded as ansi tcap sometimes and as a itu
> (gsm map) tcap sometimes.
>
> thanks a lot!
> bye now!
> cristian
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