Allow the original caller ID to be shown when a call is forwarded. Merged

Currently, when a call comes into our main line, the caller ID is shown. This is extremely helpful when receiving a call. However, if the call is received by a receptionist (or the wrong person) and is immediately forwarded to another extention, the original caller ID is lost and replaced by the receptionists extention name/number. The original caller ID is now lost, meaning the name and/or number of the original caller is gone from view. It would be extremely helpfull to keep the original caller ID on a simple transfer.