https://lens.poly.com/manage/software-versions?tenantId=97f93b37-0908-42c8-b0a8-27e9db4b20b3

Resolved Issues

Audio

• When using a Savi headset with an APP-51 adapter with a CCX 400 phone, calls answered using the handsfree speaker drop when you use the headset's call control button to switch audio to the headset.

Interoperability

• Skype for Business did not automatically pair with BToE.

Peripherals

• After connecting a Bluetooth headset and then making a call by deliberately using the handset or handsfree speaker, switching to the headset during the call results in no headset audio until the audio termination is switched from the headset and then back again. This issue only affects the first call made this way.

User Interface

• CCX in USB Phone base profile displays dates incorrectly in some regions where date format varies between MMDD and DDMM. Date format is now pulled from the PC and format options are removed from the CCX preferences menu

Known issues

Call Management

• If a user places a Teams call on hold using their Teams PC client, the connected CCX phone in USB phone mode can't mute the microphone using the mute button.
• If a user places a Teams call on hold using their Teams PC client, the connected CCX phone in USB phone mode can't mute the microphone using the mute button.

Resume the call then mute the microphone with the mute button.

Wi-Fi

• CCX does not apply the Wi-Fi Country of Operation setting when it is changed from the Web interface or the Admin Menu and must be manually rebooted for it to take affect.