We have 3 companies all using the same 3CX system on the same SIP account. Each company has it's own DID number. We want the ability to be able to dial out from any of the 3 companies using the programmable line button so that the outgoing call has the proper caller id. Is there a way to accomplish this? We don't have to use the line button, that was just the first idea that came to mind. Thanks!