[asterisk-r2] The call audio suddenly becomes screeching noise after random amount of seconds (MFCR2 claro argentina)
soporte at monssa.com.ar
soporte at monssa.com.ar
Sat Aug 6 06:34:47 CDT 2016
Thanks for your reply.
I'll start messing with the BIOS settings.
Its strange because the test box I'm using now is the same hardware in
which the card was running fine until I changed the PBX.. but is a much
newer debian, maybe that has someting to do with it.
The only PCI card installed is this openvox digital card in question.
I'll try to disable anything I don't use.
Thanks
El 06/08/16 a las 01:01, Latre escribió:
> Check your BIOS, maybe you have a share IRQs, disable COMs and LPT1,
> and all unnecessary things.
>
> Revisa que en el bios no tengas habilitados seriales, lpt1, audio o
> esas cosas que realmente no usas.
>
> Si las tarjetas son PCI puede provocar problemas.
>
> Intenta con solo una.
>
> On Fri, Aug 5, 2016 at 2:09 PM, <soporte at monssa.com.ar
> <mailto:soporte at monssa.com.ar>> wrote:
>
> Hello, I'm new to this list and to some extent, to asterisk. If
> you want to reply in spanish, do it; or for me to explain someting
> in spanish, let me know.
>
>
> I'm having this problem:
> In my workplace, I was tasked with replacing the functioning
> asterisk-freepbx PBX running old versions of debian and asterisk,
> for a new asterisk PBX w/o freepbx.
> The PBX had a couple of OpenVox analog cards, which didn't give me
> any major trouble, and a digital D210P card, connected to a MFCR2
> line from Claro(telmex). I'm in Argentina. The digital lines were
> working.
> When building the new pbx, I took the digital card from the old
> one and tested it in the new one, I got it working, tried some
> calls and everithing was good, aparently.
> Then, when we moved the new pbx into production, people started
> complaining the calls would cut with noise, or some other people
> tought a fax machine or modem took over the line, because the
> calls would connect, the two parties were able to talk, but after
> some time (not a fixed amount of time, most of the time about 1 or
> 2 min, sometimes more) both parties stopped listening to eachother
> but a high pitched noise, similar to acoustic feedback or the
> screech of analog modems when they try to communicate, but the
> noise was digital in nature, not analog, not feedback, it was
> constant in volume and didn't alter when speaking into mic, or
> over time.
> To test without having the other lines drop everytime we had to
> reconfigure dahdi or restart the system, we moved the card to a
> test box (the hardware from the old PBX being replaced, but a new
> disk with the same system as the new one, devuan jessie).
> We got the card and the mfcr2 line working, made test calls and
> the random noise was still present.
> We checked dahdi_tool for IRQ misses, at the same time the noise
> appeared, and nothing (0) misses.
> We disabled echo cancelling, with no success.
> We tried changing the balun, with no success.
> We tried using the same version of DAHDI as the old working box
> (2.4.1) with no success.
> We used dahdi_monitor to check the levels, and when the noise
> appears, the TX still shows the level of the call sent by asterisk
> (for example, if we let the call play MOH forever, we see the MOH
> levels on TX), but on RX we see the level of the noise received
> (2032 is the value of the noise, always constant, doens't matter
> of the other party is silent or yells in the mic, when the noise
> starts it continues always constant).
> We run the dahdi_test tool and we always get like 99,999%
> We tried to stress the CPU during a call to trigger the noise,
> without success.
> We monitored the mfcr2 channel log during the call, but when the
> noise appears, nothing comes up... like the call was still normal,
> in a sense that's true because the call is still stablished, but
> both parties hearing a noise (that I dont know where it comes
> from..). When one of the parties hungs up, then I get the event in
> the log file, like normal.
> We used the same configuration parameters as the old working PBX,
> if you need them I'll paste the system.conf or chan_dahdi.. but I
> don't think they're the problem, because we can get all the
> channels up and running.
>
> Now in the test box im running:
>
> pruebatrama*CLI> mfcr2 show version
> OpenR2 version: 1.3.3, revision: (release)
>
> pruebatrama*CLI> dahdi show version
> DAHDI Version: 2.4.1.2 Echo Canceller:
>
> pruebatrama*CLI> core show version
> Asterisk 13.11.0-rc1 built by asterisk @ pruebatrama on a i686
> running Linux on 2016-08-04 17:43:00 UTC
>
> I'm running the old dahdi version because it's the same the old
> working pbx had running. It's the dahdi distributed by openvox and
> installed according to the card manual:
> http://www.openvox.cn/pub/manuals/Release/English/D210P%20DE210P_on_DAHDI_User_Manual.pdf
> <http://www.openvox.cn/pub/manuals/Release/English/D210P%20DE210P_on_DAHDI_User_Manual.pdf>
> We initially tried the current 2.11 release but it didn't work at
> all. The previous 2.10 did work (with the same noise problem), but
> then I replaced it with the 2.4 to test.
>
> Let me know if there is some information I left out...
>
> Thanks in advance.
>
> Julian.
>
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--
Julián Metelski
Departamento IT
Monitoring Station S.A.
Calle 48 n° 812
La Plata (B1900AHN) - BA - ARG
Tel/Fax: (+54) 221 425 3355
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