Symptom
When answering a phone call, the lights on the Jabra speaker keep blinking, indicating that the phone is ringing in the background. The blinking does not stop during the call. But as soon as the call is finished, the phone starts ringing without any message on the Aircall application.
Cause
This is due to a built-in call control feature for easy call handling when connected via USB or Bluetooth. It also has a feature to connect 2 devices at the same time with 1 audio connection, which could be used for a conference call but does not support VoIP calls.
Solution
To resolve this issue so that Jabra speakerphone can be used for Aircall calls when connected via USB you should disable all the advanced sound functions in the Aircall application.