NethVoice CTI: activate the pickup feature

[andrea-marchionni]

To implement the ability to intercept a call ringing on another extension in the NethVoice CTI frontend, the following states and corresponding functions need to be managed:

States to Manage and Functions

1. Ringing

   • Functions:
     • Hangup: End the ringing call.
     • Pickup: Answer the ringing call on the intercepting extension.

2. Connected

   • Functions:
     • Book: set a callback for the connected call.
     • Hangup: End the connected call.
     • Listen: Monitor the call silently without participating.
     • Intrude: Join the call actively, enabling interaction.
     • Recording: Start or stop recording the ongoing call.

Each function should be properly integrated into the frontend with corresponding buttons or actions, ensuring seamless interaction for the user.