Re: [Openh323gk-users] gnugk 2.03 and TAPI, NM and CISCO

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Franz, Thanks for your answer. If you like I'll sent you a trace made by
ethereal to visualize the error situation. regards, Tjapko.


----- Original Message -----
From: "Franz J Ehrengruber" <franz@iptelenet.com>
To: <openh323gk-users@lists.sourceforge.net>
Sent: Monday, June 09, 2003 4:58 PM
Subject: Re: [Openh323gk-users] gnugk 2.03 and TAPI, NM and CISCO


>
> [Tjapko wrote]
> Jan, Chih Wei? Can somebody help me putting back the functionality in
> version 2.03 as described in document
> http://www.openh323.org/pipermail/openh323/1999-July/000963.html  says
that
> the ASN parser encodes 8x 01 00.  Maybe it did then, but it does not now.
> It encodes it as 8x 00.  (x is the choice number).  So something seems to
be
> changed.  But this has been though about before. The ASN parser should
> encode 8x 01 00 but trace analysis (etherreal I have the trace available)
> shows only the first 2 bytes are encoded with the last version of gnugk
> 2.03. ( Like 8x 00) 81 means the second after extension marker 01 means
> length of element 00 means that there is no information thus no next
octet.
> 00 actual element content
>
> This mismatch causes problems when using TAPi or NM dialers when your
> terminating endpoint is using Cisco routers. For example the as5350. In
your
> trace you see a function not supported or a drq after a normal connection
> that gets immediately disconnected (and CDR generated) because of the
> absence of the mentioned field. When you use terminating endpoints that
does
> not deal with the facility message you will not run into any problems. It
> seems a bug in the X691 PER packet encoding rules for the TAPI dialler. I
> don't think that gnugk is wrong here but restoring the function as
described
> in above docuyment will probably fix this problem when dealing with TAPI,
NM
> and terminating Cisco's.
>
> I also would like to refer to a unanswered mail from Franz  at
>
http://sourceforge.net/mailarchive/forum.php?thread_id=1791553&forum_id=3079
> that is describing exact the same error and shows the problem in the
> displayed trace. I don't see an answer here so I suggest that this issue
is
> still open!
>
> [Franz]
> I'm currently in Hong Kong and expect to be back in the UK by Wednesday. I
> have annother patch (not related to this problem) to be published at the
> developers forum for discussion amongst the developers. At the same time
> I'll try to address above issue again.
>
> Regards,
> Franz.
>
>
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