Elastix 2.5 Voice Quality Issue
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Dears,
i have Elastix 2.5 and i am Accessing the Extension using OpenVPN and i face very bad voice quality while calling Extension to Extension noting that i enabled the g729 Codec on the server and i am using Zoiper Soft-Phone
so any help ?
Thanks -
Is OpenVPN on all of the extensions? What does the poor quality sound like? Did you do g.729 because you were bandwidth constrained?
- Have you tested without OpenVPN in place?
- Have you tested with g.711 codec?
- Are you traversing the WAN?
- Have you checked bandwidth utilitzation to see if you are saturated?
- Have you gotten a MOS score for each of the links?
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@scottalanmiller i am using OpenVPN because VOIP traffic is blocked in my country
and i have no any issue regarding the internet connection whether the source or the destination
and i did not test g.711 codec i could not find in the freepbx admin portal -
@AlyRagab said:
and i did not test g.711 codec i could not find in the freepbx admin portal
It's the default and I would try that before going to something else. Anything like g.729 does heavy compression that you can hear to try to get you down to a much smaller bandwidth. That's good, but the codec is heavily lossy and you will certainly hear a drop in audio quality. g.711 is what "normal" phone calls are, so we always start there and only change when there is a bandwidth problem.
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@AlyRagab said:
@scottalanmiller i am using OpenVPN because VOIP traffic is blocked in my country
Where is it blocked? At the connection to the ISP? As it enters or exist the country? Are the end points over the WAN?
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@scottalanmiller i am from Egypt,and the ISPs are planning to prevent the VOIP Traffic so the only solution is using the openvpn.
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@AlyRagab said:
@scottalanmiller i am from Egypt,and the ISPs are planning to prevent the VOIP Traffic so the only solution is using the openvpn.
Makes sense, but that is only on the WAN links, internally you would not use it. Is this for home extensions?
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If you are using Zoiper or Linphone or similar, ZeroTier is an option too. I've tested that and it works fine here (I'm on Crete, not that far from Egypt.)
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@scottalanmiller you mean that may be the issue because of the soft-phone ?
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@AlyRagab said:
@scottalanmiller you mean that may be the issue because of the soft-phone ?
No. But I'm going to keep asking the same questions over and over if you don't answer the ones that I'm asking. It's very hard to troubleshoot without the basic picture.
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@scottalanmiller it is strange case , i worked with Elastix 2.4 with OpenVPN and everything is very good
so is there any new configuration that must be taken into consideration while working on Elastix 2.5 ?
i want to thank you my dear for your impressive support :) -
@AlyRagab said:
@scottalanmiller it is strange case , i worked with Elastix 2.4 with OpenVPN and everything is very good
so is there any new configuration that must be taken into consideration while working on Elastix 2.5 ?
i want to thank you my dear for your impressive support :)Not really, everything should work the same. The g.729 and OpenVPN were there before?
What about the answers to my questions?
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@scottalanmiller i dont use it for home extensions also i use the vpn for WAN Connection only.
now i can see that it is network issue as the delay now is "307 ms"
so i will check it and update you if the network issue solved and problem still. -
@AlyRagab said:
@scottalanmiller i dont use it for home extensions also i use the vpn for WAN Connection only.
now i can see that it is network issue as the delay now is "307 ms"
so i will check it and update you if the network issue solved and problem still.You start to get audio issues with a total latency of 200ms. If you have 307ms on a WAN link, that suggests that you could be seeing way over 600ms on a fall. That would sound awful.
