Date: Sun, 5 Apr 1998 19:45:54 +0200 (CEST) From: hm@kts.org (Hellmuth Michaelis) To: freebsd-isdn@FreeBSD.ORG (ISDN for BSD) Subject: Re: Callback with i4b Message-ID: <m0yLtUQ-00024UC@bert.kts.org> In-Reply-To: <199804041157.NAA01485@rvc1.informatik.ba-stuttgart.de> from Wolfgang Helbig at "Apr 4, 98 01:57:04 pm"
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Wolfgang Helbig wrote:
> > Is anybody successfully using callback with i4b? I have a setup where I
>
> It works fine with a bisdn machine calling back.
>
> There seem to be some problems, it *both* i4b-machines are connected to
> a PBX instead of directly to an NT from the telecom.
I am almost only using callback and calledback and use normal dialing just
for test purposes.
It doesn't matter if both machines are on a PBX or not or if one is bisdn
based or i4b based or any combination of these.
AFAIK yet, the problems are based on several things:
- isdnd is currently no able to handle simultaneous callins and
callouts (the callout for a callback destination goes out on
one B channel and before this call is terminated the callback
comes in on the other B channel). Changing isdnd to be able to
handle this situation is non-trivial.
- isdnd's state machine and timing machinery is currently not
completely implemented and needs some thinking and cleanup.
- there seem to be one or more race condition(s) somewhere in
the stack which needs to be found and fixed.
hellmuth
--
Hellmuth Michaelis hm@kts.org Hamburg, Europe
"Those who can, do. Those who can't, talk.
And those who can't talk, talk about talking." (B. Shaw)
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