Change Incoming Caller ID

I am running raspbx. I have Sipgate SIP trunk registered. All incoming calls go to an announcement, then get sent to an internal extension, I would like to add a 0 to the caller ID when the call comes through. I have limited knowledge in this area of technology. Could anyone help please?

I’m not sure the purpose since it sounds like all calls are coming through the same path, but you can add a CID prefix.

So if your prefix is 0: ( I use the colon to seperate prefix from the number calling ) the call will look like this.


modified to