Symptoms
I cannot hear anything from the headset and the microphone does not work only when in a call in 3CX and Jabber applications, there are no such issues in Skype, Cortana and other Windows applications.
Cause
- Specific 3CX and Jabber protocol's behavior
- Configured corporate NAT (Network Address Translation) preferences in your company
Resolution
Open the virtual machine's configuration > Hardware > Network 1 > change Source to Bridged - Default.
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