NethLink: Add support for USB/Bluetooth headset call control commands (answer/hold/mute/end)

[andrea-marchionni]

Description:

It would be great if NethLink could support hardware call control commands from USB and Bluetooth headsets.

Many users rely on headset buttons to manage calls, but currently NethLink does not react to these events.

Requested functionality:

• Detect headset call control events (HID or Bluetooth HFP/HID)

• Map headset buttons to:

  • Answer incoming call
  • Hold/resume call
  • Mute/unmute microphone
  • End call

• Provide configuration options for custom key mapping (optional but desirable)

Benefits:

• Improved accessibility and hands-free operation
• Better user experience for call center and professional environments
• Consistency with other softphones that already support headset controls

Expected behavior:

• Pressing the headset answer button should accept the incoming call
• Pressing the hold button should toggle hold/resume
• Pressing the mute button should toggle microphone mute/unmute
• Pressing the hang up button should terminate the call