Ethereal-users: RE: [Ethereal-users] Q931 over TCP

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From: "Kukosa, Tomas" <tomas.kukosa@xxxxxxxxxxx>
Date: Fri, 28 Jul 2006 07:37:46 +0200
Please could you send your trace?
 
Also note that Ethereal is no longer maintained, all development has moved to
Wireshark: http://www.wireshark.org .

 
From: ethereal-users-bounces@xxxxxxxxxxxx [mailto:ethereal-users-bounces@xxxxxxxxxxxx] On Behalf Of Mike Ollington
Sent: Wednesday, July 12, 2006 8:50 AM
To: ethereal-users@xxxxxxxxxxxx
Subject: [Ethereal-users] Q931 over TCP

Hello,
 
I have a capture with 802.1q VLAN tags taken between an Avaya IP handset and an Avaya Call Manager and I'm trying to understand call setup.  I presumed this was H323 (tcp 1720) and tried the two `decode as' options only to produce nonsense and assumed that it was proprietory.
 
By chance, I opened the same trace in Wildpackets Omnipeek, which identified the traffic as TPKT and Q931 and within this I could see call setup data.  When I attempt to `decode as' the traffic as TPKT, Ethereal doesn't realise there is Q931 in there with the info showing an unknown TPDU type (0x0).
 
Am I doing something wrong?  Is there a way to decode directly as Q931 rather than relying on the TPKT dissector to work it out?
 
Thanks,
Mike

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