https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13926

--- Comment #10 from conall.prenderg...@anam.com ---
Hi Pascal,

>From my understanding, the following rules will always apply to a tcap
transaction.

Given that entity A sends a BEGIN to entity B.


For TCAP CONTINUEs to A:
The dtid and sccp called address of the CONTINUE will have the otid and calling
address of the begin. 
The otid will be generated by B on the first CONTINUE and will be constant for
the remainder of the transaction. 
The sccp calling address could be different to what was the in the called
address of the begin.

For TCAP CONTINUEs from A:
The otid and sccp calling address of the CONTINUE will have the otid and
calling address of the BEGIN.
The dtid will be the otid of the first reply (CONTINUE) from B.
The sccp called address will be the sccp calling addresss of the first reply
from B.


For TCAP ENDS from A:
The otid will be blank. 
The dtid will be the otid of the first reply from B.
The sccp called address will be the sccp calling addresss of the first reply
from B.
The sccp calling address will be the calling address of the BEGIN.


For TCAP ENDS to A:
The otid will be blank.
The dtid and sccp called address will have the otid and calling address of the
begin. 
The calling address will have the calling address of the first reply from B.



As far as I know, there will only ever be one TCAP transaction between any two
sccp parties.

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