Thank you, that huge hint. > On Jun 1, 2017, at 00:15, Matt Fredrickson <cres...@digium.com> wrote: > > On Tue, May 23, 2017 at 12:43 PM, Konrad Endruszkiewicz > <konrad...@gmail.com <mailto:konrad...@gmail.com>> wrote: >> Hi, >> >> thanks for info. I will have a look on this sig_pri.c from Asterisk code. >> Right now I'm struggling with the issue of handling situation, when >> the app is getting RING event, the call is answered, but when by the >> network issues, the call is cut off, then I don't get the HANG UP >> event and the app is still considering that call is active. >> The card is using Unnumbered frame event, when this kind of event >> occurs, where subtype is set to SABME (set asynchronous balanced mode >> extended). >> >> But libpri seems not have the direct way to handle this event (or I >> cannot find how to capture this). >> Maybe you have any idea how to approach this? > > Sorry about the delayed response, I was on vacation last week and > didn't check my email :-) > > There is a timer, T309, that is used to allow calls to remain > connected for some period of time after layer 2 (Q.921) has a > disconnect event or drop out of some sort. Typically, this is a layer > 2 timeout condition, where a SABME or other layer 2 message doesn't > receive a response within T200 seconds (usually 1 second). At this > point, T309 is started (usually 6 seconds) and gives layer 2 the > chance to recover. If layer 2 does not recover within T309's timeout, > all calls that are active receive a disconnect notification and I > believe you should receive HANGUP events on them as well. > > Hope that helps, > Matthew Fredrickson > >> >> Best regards, >> ______________________________________________ >> >> Konrad End >> >> >> 2017-05-23 19:27 GMT+04:00 Matt Fredrickson <cres...@digium.com>: >>> On Tue, May 23, 2017 at 5:06 AM, Konrad Endruszkiewicz >>> <konrad...@gmail.com> wrote: >>>> Hi, >>>> >>>> I looking for documentation for LibPRI 1.6 or any samples where this >>>> library is used. >>>> I need to build a software on top of this library to support big >>>> callcenter. >>> >>> Hi Konrad, >>> >>> Libpri is a library that runs on top of a DAHDI channel that operates >>> in HDLC mode. It assumes that the HDLC encoding/decoding as well as >>> CRC generation/checking occurs at lower layers - typically the dahdi >>> layer. It implements an abstraction over the Q.921 and Q.931 layers >>> that is easier to use and understand that dealing with messages >>> directly. >>> >>> The best place to look for an example with high use is that used in >>> chan_dahdi.c (more specifically, sig_pri.c) in the Asterisk source >>> code. There are one or two test applications in the libpri repo that >>> can be seen as simpler implementations, but I can't remember if they >>> still work or not (testprilib.c and pritest.c, IIRC). >>> >>> Hope that helps! >>> >>> -- >>> Matthew Fredrickson >>> Digium, Inc. | Engineering Manager >>> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA >>> >>> -- >>> _____________________________________________________________________ >>> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >>> >>> asterisk-dev mailing list >>> To UNSUBSCRIBE or update options visit: >>> http://lists.digium.com/mailman/listinfo/asterisk-dev >> >> -- >> _____________________________________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com >> <http://www.api-digital.com/> -- >> >> asterisk-dev mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-dev >> <http://lists.digium.com/mailman/listinfo/asterisk-dev> > > > > -- > Matthew Fredrickson > Digium, Inc. | Engineering Manager > 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com > <http://www.api-digital.com/> -- > > asterisk-dev mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-dev > <http://lists.digium.com/mailman/listinfo/asterisk-dev>
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