On 06/01/2011 06:28 PM, Steve Davies wrote: > On 1 June 2011 15:10, randall <[email protected]> wrote: >> On 06/01/2011 03:55 PM, randall wrote: >>> On 06/01/2011 03:41 PM, Tzafrir Cohen wrote: >>>> On Wed, Jun 01, 2011 at 08:06:02AM +0200, randall wrote: >>>>> Hi all, >>>>> >>>>> After running fine for a few months now asterisk seems to hang >>>>> frequently , still functioning but the DAHDI channels seem busy (users >>>>> report a busy signal when calling or being called) >>>>> >>>>> A reboot will allow it to run for another day or maybe 2 or 3 till the >>>>> problem occurs again. >>>>> >>>>> >>>>> running stock Asterisk 1.6.2.9-2+squeeze2 on Debian with stock kernel >>>>> 2.6.32-5-686 >>>>> >>>>> i get the following errors: >>>>> pri_dchannel: PRI got event: HDLC Bad FCS (8) on Primary D-channel of >>>>> span 2 >>>>> >>>>> (happens on all 4 spans) >>>>> >>>>> and the following in dmesg: >>>>> [ 9004.635323] NOTICE-xpd_bri: XBUS-00/XPD-01: D-Chan RX DROP: BADFCS: 252 >>>>> [ 9004.635332] NOTICE-xpd_bri: XBUS-00/XPD-01: D-Chan RX: current >>>>> packet[0..2]: 55 55 FC >>>>> [ 9004.635340] NOTICE-xpd_bri: XBUS-00/XPD-01: Multibyte Drop: errno=-71 >>>>> >>>>> >>>>> Channel 0/1, span 1 got hangup, cause 18 >>>> >>>> Is this happening in the middle of a call? Or only a while after the >>>> call ended? >>>> >>> >>> the "bad fcs" messages seem to happen random >> there seems to be a relation indeed, have seen them happen randomly >> quite spurious, but they indeed tend to happen a while after the call is >> made. >>> >>> the hangup happens when a call through DAHDI is attempted, >>> (usually after it has been working fine for a while a day or 2) > > In my experience, FCS errors are caused by line quality issues, and > usually (not always) are in the telco's equipment. If they are only > happening occasionally, it may be a marginal, but mostly-OK signal on > the wire. > > Do you also get occasional poor-quality audio on calls? The issue will > happen more when a call is being setup, or is progressing because > there are more frames being exchanged when a call is in progress.
audio quality seems to be fine ( e.g. had no complaints about that) > > I have also seen a bad component or dry solder on a voice card cause > this, and even a badly made ISDN cable can be part of the problem. If > none of that helps, I would ask the telco to put a trace on the line. would these FCS errors cause the system to become unresponsive leading to "Channel 0/1, span 1 got hangup, cause 18" after a period of working fine, or is this an unrelated issue? > > Hope that helps, > Steve > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
