First, imagine we have to create a label (local_call):
Dial-peer cor custom
Second, imagine we have to create a box (calllocal) and we have to assign it a label (local_call):
Dial-peer cor list calllocal
Then, in this box "calllocal" we will put inside our dial peer (destination pattern or route pattern). This will be done with the command corlist outgoing.
Dial-peer voice 1 voip
Session target ipv4:126.96.36.199
Corlist outgoing calllocal
Next, we have to create the permissions (or CSS):
Dial-peer cor list Engineering
If you see, the CSS is composed by a list of labeled boxes. In this case, CSS Engineering will search for boxes labeled "911" or "local_call", so a phone can reach the destination pattern that is inside and then the call be routed properly.
You assign CSS to a phone with the command corlist incoming:
Cor incoming Engineering
I hope it helps you understanding COR, if it does please rate.
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