Call Control buttons W440 on Mitel UCA

[secueritae]

Hi,

I recently purchased a Plantronics Savi W440. The headset works with the Mitel UCA, however I cannot answer calls from the softphone using the call answer button. Additionally I cannot end the call by pressing the same button. The mute button registers however and mutes the call. Has anyone figured out a way to get this to work with the UCA?

It works perfectly fine when I'm using Skype for Business, however we make and receive calls through Mitel UCA client.

Thank you.

[secueritae]

To clarify, this is regarding the actual call button on the headset. When I click the answer button on the screen it works fine, however I would like to answer a call when I'm not at my desk but have the headset on by pressing the button on the headset.

With Skype I can answer the call by pressing the button on the headset.