Ascend Archive
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Re: (ASCEND) Callback Problems

On Thu, Aug 14, 1997 at 02:18:21PM +0000, Gerd Bohnenstengel wrote:
> Thomas Stinner wrote:
> > 
> > > OK, tell me more about this. The MAX calls the Pipeline, which authenticates
> > > the MAX and then drops the call (telkom does not tell the MAX that the
> > > call dropped), and the Pipeline calls back to the MAX.
> > 
> > No, it's different.
> > 
> > The Max calls the Pipeline, the Pipeline "sees" the CLID and _rejects_ the
> > call. The Pipeline then calls the Max.
> > 
> > The problem here: The reject is hold by the german telekom for up to 40
> > seconds.
> 
> Why can't this be implmented over D-Channel. Then we all can save money
> for callback's. 

It _is_ a D-Channel issue. The Caller calls the callee, which sees the
call (SETUP), identifies the CLID of the caller, matches it against
its profiles and if one with this CLID exists, and has Callback set,
refuses the call and calls back. That is what D-Channel-Callback (or
ISDN-Callback or CLID-Callback) is about.

> With the callback method above, we must pay for every call. (in Germany)

Nope. Only with PPP callback you would. The selection criteria of whether
PPP or CLID callback is used is (obviously) whether CLID auth would work
in the first place. Aka Id Auth=Prefer (at least) and the correct
Calling # in the profile.

> I cant`t tell
> our customers they must pay for callback because we are using Ascend or
> sorry, we can't
> offer u any callback !  

You can do this with Ascend. If it doesn't work in the first place, it is
because of broken software at the -T--. Bad enough, this broken software
interferes with some parameter lack (callback delay f.i.) and some general
working principle (call collissisons are evil) of the Ascend device, but
first to blame is -T-- (especially to customers). Then, the LAN-Adrs hack
is the solution to still get it running.

-- 

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