[Bristuff-users] question about bristuff not working in Italy

[Tzafrir Cohen]

On Mon, Oct 13, 2008 at 12:23:38PM +0200, Antonio Gallo wrote:
> I recall bristuff not working here in Italy in PTMP mode connected to 
> the Telco's NT1+.
> Basically after 5 minutes the Telco turn off the power and both the 
> L2+L1 goes down.
> So when making Dial it get the CONGESTION things.
> I recall switching to chan_misdn because of this: chan_misdn has a 
> parameter to try to turn on the NT1+ power on again.
> 
> I also recall on some system that Bristuff and the Telco's NT1+ were 
> unable to agree about the TEI
> and needed like 30 minutes before it start to works. Never had this 
> problem with mISDN.
> 
> Has there been any news about this in latest 12 months?

It seems that bristuffed drivers approched this issue in a much uglier
way: pretend there's no alarm. 

The Astribank BRI module (xpp/card_bri.c) keeps track of layer 1 state,
knows exactly when it goes up or down (and will try to bounce it back up
if a call should go out). But reporting this to Zaptel as an alarm? Nah.
Asterisk might think that the psan is down and not send calls.

qozap behaves slightly differently. It still notifies about this to
Zaptel, because when it no longer gets layer 1 connection, it can no
longer sync timing from the BRI trunk. Hence it calls the function
(invented in the bristuff zaptel patch)
zaptel_alarm_notify_no_master_change() , which duplicates the code from
zaptel_alarm_notify and removes the master crowning bit.


So Asterisk doesn't really know that layer 1 was down.
I'm not sure how it works in Asterisk 1.6 . I hope that nicer.

-- 
               Tzafrir Cohen
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