Is there any way to preserve caller-id on forwarded calls?
The reason I ask is that we have a customer with an external voicemail to email service. It works fine except that the source number is always their main number. (On their old phone system this was not a problem)
It seems this would be really useful in the case of forwarding to a cell phone as well.
As near as I can tell -- the only place to set up any kind of caller-id is on the SIP trunk config -- and that only allows 1 number to be set?