I’m working with a company to replace all their desk phones and we are trying out some S500’s but the volume on the handset is really loud and even distorted. This occurs on the DTMF feedback, dialing and remote audio. Even with the volume adjust set all the way down to the 1, the lowest it will go, the volume is still too loud to be comfortable. The web GUI has a volume amplification section and a handset send volume but even with that set to -6, the issue persist.
We had this issue with this phone and we narrowed it to G722. Try changing your FreePBX SIP codec order with G711 at top. This fixed it for two installations with S500s having the same issue with “sending” audio being shouty and distorted. Have since moved to Yealinks and never looked back.
I’ll add to this as well, but this effects S300, S400, and S705s as well. The additional issue I had was with the S300s. I have some that are on an older cable and force them to 10 Mb for speed. With the latest update, they will no longer connect, they port will just bounce. If I downgrade to 1.58, then they work fine.
So for me, I have the auto negotiate speed below 100 doesn’t work and the sound is pretty bad.
Again, not a pressing project, but I’ll need to open a ticket to have this resolved.
IMO a major bug has been introduced that must be fixed. An important feature of IP desk phones is that they can use existing in-wall wiring originally intended for analog phones, simply by replacing the RJ11 wall jacks with RJ45. Of course, the old Cat-3 or Cat-nothing cable won’t support 100 Mbps, so the ability to handle 10 BaseT is essential. In my experience, Yealink, Grandstream and HTek phones all do fine. Sangoma should stay competitive in this regard.