Wireshark-users: Re: [Wireshark-users] why ISUP are not parsed by WS?
From: Jeff Morriss <[email protected]>
Date: Tue, 03 Apr 2007 18:07:02 +0800

Alexander Bubnov wrote:
Hello, all!

I download a sample cap file with ISUP/MTP3/M3UA/SCTP/IP protocals
from http://wiki.wireshark.org/SampleCaptures#head-97e33c24b1164f61e8669d78312d9db300f6b894

The link is

If I open it with help of wireshark tool that I can see only
IP/SCTP/MTP3 protocols ISUP cannot shown.
The last line of MTP 3  Adaptation Layer looks:
Unknow parameter (tag 2 and 69 bytes value)

Probably, the message inside of MTP3 is not parsed.
In fact that capture file contains M3UA draft 6 data (which is vastly 
different in format than M3UA at the RFC level).
To see the ISUP messages, change the M3UA version preference 
(Edit->Preferences->Protocols->M3UA) to be "Draft 6" instead of RFC.
I'll update the Wiki to state that...