We have been asked by a customer if it is possible to forward a call using call forward all, and still display the original caller id.
Basically the system forwards all calls after hours to a mobile. But the customer wants the caller's number to display on the mobile. Is this possible?
They are using a new Cisco UC500 series.
No, generally it's not possible, because telco doesn't accept arbitrary numbers as calling.
Otherwise, it would be possible for anybody, to originate calls pretending to be someone else, for prank or malice, obviously this is not safe.
I said generally because some telcos in the US, for PRI customers, don't care about which calling number is used, and send it unchanged.
Hope this helps, please rate post if i does!