11.2 Conditional forwarding
You can use this forwarding function to specify whether telephone calls are forwarded if you have left the telephone ringing for a certain period of time.
To forward calls that you do not answer (Conditional call forwarding)
1 Open your dashboard.
2 Tap under Reachability in the Forwarding section.
3 Activate If no reply in the Conditional area.
4 Enter the time in seconds. Calls are forwarded if you have not accepted them within this time.
 
As of iOS version 16, even if you have entered a value in the "After" field > 60 seconds, both the acoustic and visual call signaling will still end after 60 seconds. However, this does not mean that the call is ended by the operating system after 60 seconds. Forwarding continues to take place as configured.
 
5 Enter the destination in the Forward to field. You can choose between:
*Selection from the contacts
*Entering a phone number
*Your voicemail.