Ethereal-users: Re: [Ethereal-users] analyzing gsm dtap messages encapsulated in mtp2/mtp3/sccp

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From: Jeff Morriss <jeff.morriss@xxxxxxxxxxx>
Date: Tue, 27 Sep 2005 09:19:17 -0400


h h wrote:

Hello,
I have a file containing raw gsm bssap messages that are encapsuated inside mtp2/mtp3/sccp headers. I wrote a small program that prepends ethereal header and a frame header before each pkt. Ethereal can succesfully decode each pkt upto SCCP but not further. What am I missing? Does Ethereal not support gsm bssap encapsulated in sccp? Any suggestions would be helpful.
Try Edit->Preferences->Protocols->TCAP and set the range of SSNs (to be decoded as TCAP) to something that includes your Called and/or Calling SSNs. 

You might have to do the same thing with the GSM preferences.