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- Sep 28, 2017
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Hi, All,
We are having a strange issue on our new 3CX system; it sounds like its transcoding all audio to a considerably lesser quality codec.
Basically the issue is whenever the audio goes via the PBX, e.g. if we enable call recording this audio sounds crystal clear inside recorded call wav files, The audio that is delivered back to the phones sounds like it been re-encoded to a considerably lesser quality codec.
A little about our configuration,
KVM Hypervisor (Proxmox VE 4.4)
Were using Debian 8 SC, 3CX 15.x (latest version) w/ Yealink T46G & T46S Phones Also 3CX. (Softphones seem to experience the same issues.)
4vCPU E5-2650v2
8GB RAM
200GB SSD Disk
We have several sites connected via Private Ethernet WAN Services, and our System is hosted in our Datacentre, low lantecy and uncongested WAN links.
The Yealink phones talk Peer 2 Peer, and this is using The G.722 codec and is very clear audio across all sites.
In troubleshooting, we have all of our phones/extensions configured to use only G.722, and our SIP Provider supports G.722 as well, so we have removed all of the other codecs that I have been able to find manually from the SIP Trunks and phones as well.
Including removing the other codecs from the order list from the following files and restarting our PBX VM.
/var/lib/3cxpbx/Bin/3CXPhoneSystem.ini
LocalCodecs = G722
ExternalCodecs = G722
/usr/share/3cxpbx/skel/Bin/3CXPhoneSystem.ini
LocalCodecs=G722
ExternalCodecs=G722
/usr/share/3cxpbx/skel/Instance1/Bin/3CXPhoneSystem.ini
LocalCodecs=G722
ExternalCodecs=G722
Any suggestions?
Regards,
Quenten
We are having a strange issue on our new 3CX system; it sounds like its transcoding all audio to a considerably lesser quality codec.
Basically the issue is whenever the audio goes via the PBX, e.g. if we enable call recording this audio sounds crystal clear inside recorded call wav files, The audio that is delivered back to the phones sounds like it been re-encoded to a considerably lesser quality codec.
A little about our configuration,
KVM Hypervisor (Proxmox VE 4.4)
Were using Debian 8 SC, 3CX 15.x (latest version) w/ Yealink T46G & T46S Phones Also 3CX. (Softphones seem to experience the same issues.)
4vCPU E5-2650v2
8GB RAM
200GB SSD Disk
We have several sites connected via Private Ethernet WAN Services, and our System is hosted in our Datacentre, low lantecy and uncongested WAN links.
The Yealink phones talk Peer 2 Peer, and this is using The G.722 codec and is very clear audio across all sites.
In troubleshooting, we have all of our phones/extensions configured to use only G.722, and our SIP Provider supports G.722 as well, so we have removed all of the other codecs that I have been able to find manually from the SIP Trunks and phones as well.
Including removing the other codecs from the order list from the following files and restarting our PBX VM.
/var/lib/3cxpbx/Bin/3CXPhoneSystem.ini
LocalCodecs = G722
ExternalCodecs = G722
/usr/share/3cxpbx/skel/Bin/3CXPhoneSystem.ini
LocalCodecs=G722
ExternalCodecs=G722
/usr/share/3cxpbx/skel/Instance1/Bin/3CXPhoneSystem.ini
LocalCodecs=G722
ExternalCodecs=G722
Any suggestions?
Regards,
Quenten