Re: [Asterisk-Users] Clicks in audio with TE100P PRI
Which file does the jitterbuffer setting go in, zaptel or zapata.conf? I can't find it documented anywhere. What version of zaptel drivers include a jitterbuffer? == Rod Bacon Empowered Communications Ground Floor, 102 York St. South Melbourne Victoria, Australia. 3205 Phone: +613 99401600Fax: +613 99401650 FWD: 512237 ICQ: 5662270 == Alejandro G wrote: I tested all again. No matter if span=1,1,0 or span=1,0,0 if I configure jitterbufer=4 I have glitches that I'm almost sure that are holes in audio. If I raise jitterbufer=16 the problem disappear (or becames impercetible). Anyway I am interested in understand what is happening. Your issue is very likely the size of the zaptel jitterbuffers setting. If the zaptel driver is not immediately available to accept a frame of data it places it in an internal queue of pending writes. If that queue is full then the write is refused by the zaptel layer and then silently discarded by chan_zap causing a gap in the audio once it is played out of the zaptel card. If you crank up the debug level you will probably see 'Write returned -1...' (aka. EAGAIN) debugs that mostly correlate to the pops and clicks. Note that the zaptel driver legitimatly (if perhaps not appropriately) also refuses data when the channel is muted, such as during DTMF generation and at other times, so not _all_ EAGAIN debugs are a sign of problems. This makes perfect sense but again some issues of the problem do not match. I set debug at level 9 and there is no message of errors. Another thing I do not understand is why the same configuration: PAP2 - LAN - Asterisk - TE100P works perfect, and instead of LAN using internet generates the problem. Shouldn't it be the same for both configs? The only difference I see is that the rtp packets came from another Ethernet card, but if I call to terminate calls with another carrier using that eth works fine. What is clear is that jitterbuffer=16 corrects the problem. One more thing: no matter what codec I use, G729 or G711 the sound clicks are almost the same. Is anyway I could debug at RTP level in asterisk to see what is happening and check if there is packet loose? Thanks Alejandro ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Clicks in audio with TE100P PRI
In zapata.conf ; Configure jitter buffers in zapata (each one is 20ms, default is 4) ; jitterbuffers=16 Alejandro Ghergherian -Mensaje original- De: Rod Bacon [mailto:[EMAIL PROTECTED] Enviado el: Domingo, 25 de Septiembre de 2005 08:32 p.m. Para: Asterisk Users Mailing List - Non-Commercial Discussion CC: [EMAIL PROTECTED] Asunto: Re: [Asterisk-Users] Clicks in audio with TE100P PRI Which file does the jitterbuffer setting go in, zaptel or zapata.conf? I can't find it documented anywhere. What version of zaptel drivers include a jitterbuffer? == Rod Bacon Empowered Communications Ground Floor, 102 York St. South Melbourne Victoria, Australia. 3205 Phone: +613 99401600Fax: +613 99401650 FWD: 512237 ICQ: 5662270 == Alejandro G wrote: I tested all again. No matter if span=1,1,0 or span=1,0,0 if I configure jitterbufer=4 I have glitches that I'm almost sure that are holes in audio. If I raise jitterbufer=16 the problem disappear (or becames impercetible). Anyway I am interested in understand what is happening. Your issue is very likely the size of the zaptel jitterbuffers setting. If the zaptel driver is not immediately available to accept a frame of data it places it in an internal queue of pending writes. If that queue is full then the write is refused by the zaptel layer and then silently discarded by chan_zap causing a gap in the audio once it is played out of the zaptel card. If you crank up the debug level you will probably see 'Write returned -1...' (aka. EAGAIN) debugs that mostly correlate to the pops and clicks. Note that the zaptel driver legitimatly (if perhaps not appropriately) also refuses data when the channel is muted, such as during DTMF generation and at other times, so not _all_ EAGAIN debugs are a sign of problems. This makes perfect sense but again some issues of the problem do not match. I set debug at level 9 and there is no message of errors. Another thing I do not understand is why the same configuration: PAP2 - LAN - Asterisk - TE100P works perfect, and instead of LAN using internet generates the problem. Shouldn't it be the same for both configs? The only difference I see is that the rtp packets came from another Ethernet card, but if I call to terminate calls with another carrier using that eth works fine. What is clear is that jitterbuffer=16 corrects the problem. One more thing: no matter what codec I use, G729 or G711 the sound clicks are almost the same. Is anyway I could debug at RTP level in asterisk to see what is happening and check if there is packet loose? Thanks Alejandro ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Clicks in audio with TE100P PRI
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Alejandro G Sent: Friday, June 10, 2005 8:12 AM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] Clicks in audio with TE100P PRI It seems that configuring span=1,1,0,ccs,hdb3 and changing jitterbuffer=16 resolves or masks the issue. What I will do now is reduce again jitterbuffer to default to see what happens. Your issue is very likely the size of the zaptel jitterbuffers setting. If the zaptel driver is not immediately available to accept a frame of data it places it in an internal queue of pending writes. If that queue is full then the write is refused by the zaptel layer and then silently discarded by chan_zap causing a gap in the audio once it is played out of the zaptel card. If you crank up the debug level you will probably see 'Write returned -1...' (aka. EAGAIN) debugs that mostly correlate to the pops and clicks. Note that the zaptel driver legitimatly (if perhaps not appropriately) also refuses data when the channel is muted, such as during DTMF generation and at other times, so not _all_ EAGAIN debugs are a sign of problems. There is more background on my experience with the T100P popclick issue in http://lists.digium.com/pipermail/asterisk-dev/2005-May/012432.html Hope that helps. Kris Boutilier Information Systems Coordinator Sunshine Coast Regional District ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Clicks in audio with TE100P PRI
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of
Alejandro G
Sent: Friday, June 10, 2005 9:57 AM
To: Asterisk
Subject: [Asterisk-Users] Clicks in audio with TE100P PRI
I tested all again. No matter if span=1,1,0 or span=1,0,0 if
I configure jitterbufer=4 I have glitches that I'm almost sure that are
holes in
audio.
FYI, changing the sync source is a non-trivial thing. You need to be sure
you're also changing the sync source on the opposite end. If the T100P is
interfaced to a Telco then you really ought not to be changing this - it _will_
break things if set wrong.
{clip}
This makes perfect sense but again some issues of the problem
do not match. I set debug at level 9 and there is no message of errors.
The now-canceled patch in http://bugs.digium.com/view.php?id=4107 shows where
the data is being discarded - the reporting of this may have changed in the
current code base and/or zaptel may be accepting the data and discarding it
internally now. Asterisk is a fast moving target, take all behavioural
comparisons with a grain of salt.
Another thing I do not understand is why the same configuration:
PAP2 - LAN - Asterisk - TE100P works perfect, and
instead of LAN using internet generates the problem. Shouldn't it be the
same for both configs?
Not neccessarially; if we assume that there is no congestion on the LAN then
packets arrive off the wire, say, every 20ms, regular as clockwork +/- a few
microseconds. On the Internet there _is_ congestion, hence buffering, hence
packets might arrive in a 'squirt' as quickly as the nic can deliver them,
followed by a 'large' gap, followed by another squirt etc. Asterisk doesn't
re-marshal the packets as they pass through the core, thus the bunching up that
occurs at chan_zap, which mandates evenly spaced, well marshaled blocks of
data.
The only difference I see is that the rtp packets came from
another Ethernet card, but if I call to terminate calls with another carrier
using that eth works fine.
You mean a network-asterisk-network call path? Then, yes, that also
implies an issue at the zap layer.
One more thing: no matter what codec I use, G729 or G711 the
sound clicks are almost the same.
That implies that the issue isn't on the rtp side, rather in the core or on the
zap side as the data is transcoded to ulaw/alaw by the time it hits chan_zap.
If you were using chan_iax with the new iax jitterbuffer and enabled genericplc
you'd find the popclick didn't dissapear either.
You could also eliminate the rtp side as the source of the noise by dialing
across the network into an echo() target on the Asterisk server and then
running a stream of sound through - you might need to have a headset and play a
stereo or something into the mic. If the drop is occuring on the network or in
the core then the echo'ed audio will also contain the popclick effect.
Is anyway I could debug at RTP level in asterisk to see what
is happening and check if there is packet loose?
Depends on the channel type (sip, iax etc.) - each channel has it's own variety
of commented out very low level debugging. Use the source... ;-)
Kris Boutilier
Information Systems Coordinator
Sunshine Coast Regional District
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Re: [Asterisk-Users] Clicks in audio with TE100P PRI
On Thursday 09 June 2005 00:52, James Bean wrote: span=1,1,0,ccs,hdb3 The same thing happens. Did you rerun ztcfg? I have heard rumour (but not seen it myself) that you need to fully reset (power off/on, not just reboot) to get the card to accept a new clocking method. You may consider also that if I connect PAP2 to LAN everything works, also if I use other ip phone from internet works fine. This tells me that it's not related to LAN. I also check if I'm loosing interrupts and everything seems ok. Also I pull out the TDM400 from the box. This tells me it's got nothing to do with the TDM400 or lost interrupts. At last I change jitterbuffer=16 and it works better, the clicks are reduced. Could this be possible? What is the function of this parameter in zapata.conf? You're just masking the issue. I should tell you that the TE100P is connected to another E1 board (not a live E1) from Natural Microsystems which acts as a gateway to PSTN. This board works as a PRI master but I don't think that this could be the problem as long as using other phones or in LAN it works perfectly and the voice is clear with no clicks o sound looses. Please try what I suggested above. I am confident it'll solve your problem. -A. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Clicks in audio with TE100P PRI
On Thu, 9 Jun 2005, Andrew Kohlsmith wrote: I also check if I'm loosing interrupts and everything seems ok. Also I pull out the TDM400 from the box. This tells me it's got nothing to do with the TDM400 or lost interrupts. It could be that the user-land side (i.e. Asterisk as opposed to Zaptel) does not run often enough. A similar issue went away once we tuned on the real time scheduling for the Asterisk process. Peter ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Clicks in audio with TE100P PRI
On Thu, Jun 09, 2005 at 12:51:30AM -0300, Alejandro G wrote: I should tell you that the TE100P is connected to another E1 board (not a live E1) from Natural Microsystems which acts as a gateway to PSTN. This board works as a PRI master but I don't think that this could be the problem as long as using other phones or in LAN it works perfectly and the voice is clear with no clicks o sound looses. Do you find that these clicks occur at the same time concurrently with increased hard drive activity? If so, and if you have an IDE hardrive, try doing a `hdparm -u1 /dev/yourhardrivedevice` Matthew Fredrickson ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Clicks in audio with TE100P PRI
Read this tutorial, http://www.asteriskguru.com/tutorials/pci_irq_apic_tdm_ticks_te410p_te405p_noise.html Also try to play a little with the clocking source. Joachim. Matt Fredrickson wrote: On Thu, Jun 09, 2005 at 12:51:30AM -0300, Alejandro G wrote: I should tell you that the TE100P is connected to another E1 board (not a live E1) from Natural Microsystems which acts as a gateway to PSTN. This board works as a PRI master but I don't think that this could be the problem as long as using other phones or in LAN it works perfectly and the voice is clear with no clicks o sound looses. Do you find that these clicks occur at the same time concurrently with increased hard drive activity? If so, and if you have an IDE hardrive, try doing a `hdparm -u1 /dev/yourhardrivedevice` Matthew Fredrickson ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users signature.asc Description: OpenPGP digital signature ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Clicks in audio with TE100P PRI
On Thursday 09 June 2005 08:13, Peter Svensson wrote: It could be that the user-land side (i.e. Asterisk as opposed to Zaptel) does not run often enough. A similar issue went away once we tuned on the real time scheduling for the Asterisk process. If this is the case then your system is either underspecc'd or you're doing some really screwy scheduling with your kernel. You should never have to turn on realtime unless you're trying to do a multitude of things with your PBX, besides PBXing. And that, IMO, is just a recipe for disaster. -A. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Clicks in audio with TE100P PRI
On Wednesday 08 June 2005 11:19, Alejandro G wrote: When I call to the TDM400 cards from the PAP2 eveything is OK, sound quality is perfect. When I call to terminate the call in PSTN through E100P I hear clicks which aparently are RTP packet looses. This clicks are only heard in the PSTN side, not in the PAP2. You just described a classic clock slip situation. Are you synchronizing to the PSTN? i.e. does your span line have '1' for clocking? You want to sync to them instead of free-run (clock of '0'). -A. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Clicks in audio with TE100P PRI
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Alejandro G Sent: Thursday, 9 June 2005 1:52 PM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] Clicks in audio with TE100P PRI Thanks for your answer. Googling in the lists I found what you are telling that maybe there is a synchro problem with the E1, but I'm not so sure that this could be. I am configuring zaptel.conf like this: span=1,0,0,ccs,hdb3 bchan=1-15,17-31 dchan=16 But I also changed to test to: span=1,1,0,ccs,hdb3 The same thing happens. You may consider also that if I connect PAP2 to LAN everything works, also if I use other ip phone from internet works fine. I also check if I'm loosing interrupts and everything seems ok. Also I pull out the TDM400 from the box. At last I change jitterbuffer=16 and it works better, the clicks are reduced. Could this be possible? What is the function of this parameter in zapata.conf? I should tell you that the TE100P is connected to another E1 board (not a live E1) from Natural Microsystems which acts as a gateway to PSTN. This board works as a PRI master but I don't think that this could be the problem as long as using other phones or in LAN it works perfectly and the voice is clear with no clicks o sound looses. Thanks again, Alejandro ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
