We have a customer who had the same issues. They even tried another 2033. The end solution was to get a Yealink CP860 Conference Phone. It works great on the UCx and there is no volume issues. They didn't have to get the external microphones either.
We tested the CP860 and found no issues with working on the UCx.

Avaya Manufacturer Discontinued the 2033. (See below)

End of Sale Date- 1 December-2013

End of Manufacturer Support for SOFTWARE * 1-December-2014
End of Manufacturer Support for HARDWARE * 1-December-2014
Targeted End of Services Support 1-December-2017


I know this probably isn't what you wanted to see, but this is a viable resolution.
Have a blessed night!

www.ucidirect.com
Stocking Distributor for E-Metrotel

Thanks for the quick response. It's good to know the Yealink CP860 is an option. What's odd is that the UCx supports all the other features of the 2033 sets aside from controlling the volume. We have 3 rooms with the 2033's (all with the low volume issue) so hopefully there is a software solution instead of the need to purchase new phones. Thanks.

What is the version of firmware used in these 2033 phones? To check the firmware version, you can look for example at Reports - Extensions Overview.

All 3 of the 2033 phones are running firmware 2310S58. Thanks.

Upgrade the firmware to the build S77 (2310S77) and try again.

Actually, I know for sure that the latest firmware version 2310S99 allows volume control adjustments without any problems. So, if you're updating the firmware, pick up S99. The volume should work if you have S77 or newer.

Thank you ucxguy for this information. I will file this for later use!

www.ucidirect.com
Stocking Distributor for E-Metrotel

Thanks so much ucxguy. I will update the firmware. The rest of the team will be thrilled to have a conference phone they can hear and adjust the volume on.

Anyone have a link to the firmware?

Found it searching 2310S99 Avaya support downloads.

Thanks, I updated our phone to 2310S99 today while I was taking care of some other issues. Still the same problem for us, no adjustment of audio.

I downloaded the firmware from the Avaya site but haven't installed it yet due to a crazy travel schedule this month. I will post my results with the volume issue and the 2310S99 firmware when I get it updated.

Keep an eye on this thread. We should have this volume issue addressed within a week or two.

Bump, a manager just asked me about this.

I have upgraded our 2033 phones to firmware 2310S99 and there is still no volume control like others have experienced. Hopefully E-Metrotel will respond with a fix.

Our struggle has been to get a working 2033 in the lab to complete this development. I will push hard for a resolution by next week.

emtsupport

Due to the generosity of UCXNortel (vendor), we have a 2033 in our lab! Give us a coupleo fdays and we will have an update available that will allow oyu to adjust the volum eon these Speakerphones.

Bump, any movement?