How to change the label of an incoming call?

Question

Asterisk

I apologize in advance for the possibly not quite correct terminology, I am just starting to get acquainted with Astrerisk.
An urgent task has appeared:
How to make it so that after receiving an incoming call from a certain external number by one of the internal numbers, it is marked as accepted on all other numbers?
At the moment, the call is marked as answered only on the number that received it, and on the rest - missed.

Answer 1

Dial() has a 'c' option that sends the termination reason "answered elsewhere" to the caller when Asterisk terminates the call. If the phone understands this status, it may not add the call to the unanswered list.
However, I have not had such phones yet, although Asterisk regularly sends
Reason: SIP;cause=200;text="Call completed elsewhere"