I have a customer with two BCM400's (one 3.5 and one 4.0) that are networked together with VoIP and they are using 3 digit dialing. They just purchased another company with BCM400's that uses 4 digit dialing, and want to network everything together. Is there a way to change the diaing plan from 3 digits to 4 digits without doing a cold reboot and having to reprogram everything?