Colleagues, please tell me the answer to the my question!
How to reliably distinguish answer “busy” from my local hardware and answer “busy” from remote number I’m making a call to.
Undoubtedly, the case when the hardware is busy or not in working condition and the case of the busy number is fundamentally different and they must be distinguished.
If the equipment is occupied, I must continue to move along the dialplan for outgoing connections, and make a call through the next communication channel according to priority.
If the number to which the call is being taken is busy, then I must stop calling and send a busy signal to my subscriber.
Is there any way to reliably distinguish between these two states?
Thank you in advance for your reply,