Call-in audio vs. computer audio

[giwm]

What might be the reason that those calling in (either internal or external) have HORRIBLE audio quality hearing computer users? Everyone can hear the callers fine, even other callers. Computer users can hear everyone fine. But callers can't understand computer users. What might I do to help?

 

[Evolute IT]

What codecs are you using on your phones and trunks?

WebMeeting uses OPUS, so if you're using anything else, transcoding has to happen.

 

[giwm]

I hear what you're saying, and we're not using OPUS end-to-end. But I'm not sure transcoding should make it sound like you're talking through a kazoo.

I can try to tweak codecs... seems like there was a reason I hadn't moved to OPUS yet.

 

[Evolute IT]

I hear what you're saying, and we're not using OPUS end-to-end. But I'm not sure transcoding should make it sound like you're talking through a kazoo.

I can try to tweak codecs... seems like there was a reason I hadn't moved to OPUS yet.

You can try codecs like G722 which should give a better quality. But don't be surprised of bad quality if you're using PCMU or G729.

 

[giwm]

So... even though my Yealink phones support Opus (T46S mainly), 3CX doesn't have that as an option in the templates. Because I exclusively use custom phone templates, I'm wondering if I can update the template to include the Opus payload.

Right now though, phones are set to match my trunk codec, which doesn't support Opus. So I'm not certain if there will be a gain.

 

[Evolute IT]

If the codec isn't there, it's because Yealink said to 3CX not to use it for those models. Only T5x supports OPUS on 3CX.

Like I said, try using G722 or even GSM. See if you get a better quality even though transcoding is happening.

 

[giwm]

I'm not finding an article to answer this, but how are the System > General codecs priorities weighed against the extension codecs? I'll probably find this as soon as I post. There's no easy way to reorder all extension codecs.

 

[JohnS_3CX]

Does this include people calling in from your PBX deskphones or people calling in externally via the trunk?

 

[giwm]

Both seem to have the same experience. Our internal extensions on the same LAN as the PBX and mobile phones calling in via the trunk.

 

[giwm]

I just called into a meeting from my cell phone and I can hear someone on phone-only (from their PBX deskphone) crystal clear. Anyone's voice on the webmeeting sounds awful. Like they're talking through a tunnel. If I join via computer audio, I hear everyone perfectly. So what would cause people calling in from their cell phone to have trouble hearing those using computer audio? What can I do to fix this?

 

[giwm]

So the ONLY thing that makes sense is that the webmeeting bridge is the issue.