Yealink Phones 1/3 Delay; 3CX app almost no Delay.

[theMightyMacBoy]

We are having a weird issue with our install. I'm trying to pinpoint where the issue might be.

When I did some test calls from my desk phone to my cell phone, I am getting about 1/3 second delay. This can be confirmed by doing call recording and opening up the audio file. When I do the same call, but from my 3CX app on another iPhone over cellular data to my cell phone there is almost zero delay in the audio. (WiFi and Cellular for the 3CX app give same results)

By running these two tests, the delay happens when the Yealink desk phone is in the mix. I am running the latest version of 15.5 on Debian and the latest 3CX firmware on my desk phones. This doesnt seem like a carrier issue (which is Nexvortex's mSIP service) since I don't have any issue when using the 3CX app.

I am thinking of buying a Snom and Grandstream to do some testing, but so far I am stumped so I am looking out to the community for some guidance.

 

[leejor]

Might be a Codec issue. Have you tried using different types on the desk phone? Is there Transcoding happening?

 

[Andyshawn]

Is the Yealink phone and the PBX on the same LAN?