[asterisk-ss7] Some sessions hangs. Is it possible with SS7

[Anton]

It would be hugely good for debugging to implement a
 simple, but separate SS7 ISUP messages logging. That
 should include only messages sent/received and (if)
 corresponding CIC no. Than instead having logging whole
 SS7 sessions we would have comprehensive log, which would
 mention the messages received by SS7 channel for handling.
 So if anything would be missing - that would be easily
 findable.
Also from YATE list I've seen someonne mentioned that
SANGOMA cards supports hardware level messaging. And that
direct wanpipe API comminication would scale chan_ss7 from
single E1's to a maximum, what is just possible to have in
single PC (for instance 4XE1x5cards=20E1's)! Anyway of
thinking of implementation of API to communicate with
Wanpipe API?

On 15 May 2006 11:52, Jacob Tinning wrote:
> On Fri, 12 May 2006, Anton wrote:
> > Does anyone know, if it is possible for timeslots to
> > hang, with SS7 signalling?
>
> If the implementation is 100% correct (according to the
> ITU-T spec.) it should not be posible.
>
> > For example if REL message is missing (did not received
> > in time by Asterisk) - would the accured timeslot hang
> > (be active on Asterisk side, but released in the TELCO
> > side?)
>
> The 'release' procedure is this: A REL is sent to the
> other side, and if a RLC is not received within T1
> seconds the REL is retransmitted (and T1 restarted). This
> cycle continues until a RLC is received. If a RLC is
> still not received within T5 seconds, the
> timeout-interval is changed to T5.
>
> In chan_ss7, T1 is 30 seconds and T5 is 600 seconds.
> So chan_ss7 will end up, retransmitting the REL every 600
> seconds - forever (if it doesn't receive a RLC)
>
> > I've strange issues with one of my telco's. The
> > sessions just timed out, and released by the Asterisk
> > itself, since there is 3600s duration limit.
>
> Well this is a little strange, since there is no timer in
> chan_ss7 which is setup for 3600 seconds (1 hour!).
>
> > Any help is highly appreciated!
> > ,"SS7/15","IAX2/axsoftsw1-16389","Hangup","","2006-04-2
> >1 23:04:54","2006-04-21 23:05:00","2006-04-22
> > 00:04:59",3605,3599,"ANSWERED","DOCUMENTATION"
> > ,"SS7/19","IAX2/axsoftsw1-16392","Hangup","","2006-04-2
> >1 23:05:23","2006-04-21 23:05:29","2006-04-22
> > 00:05:28",3605,3599,"ANSWERED","DOCUMENTATION"
> > ,"SS7/11","IAX2/axsoftsw1-16393","Hangup","","2006-04-2
> >1 23:46:00","2006-04-21 23:46:07","2006-04-22
> > 00:46:07",3607,3600,"ANSWERED","DOCUMENTATION"
> > _______________________________________________
> > --Bandwidth and Colocation provided by Easynews.com --
>
> Can you try to dump the ss7 trafic and post it on this
> list ?
>
> Ast*CLI> ss7 dump start /tmp/anton.dmp both lssu msu
> .
> . <wait untill it happens>
> .
> Ast*CLI> ss7 dump stop
>
> Mvh. Jacob

--
With Best Regards,
Anton

--------
Anton V. Gnitko
Technical Director
Eastera Co. Ltd.
+992 372 270101
+992 372 213627
http://www.eastera.net

-------------------------------------------------------