Hello, I am inexperienced with Panasonic phone systems. I have a customer with a Panasonic KX-NS700 phone system. At random times, several or all of the trunks "lock up" and can only be released by either physically removing and reconnecting the lines, or rebooting the entire system. Sometimes, all of the extensions show as busy, and can only be remedied by rebooting the system. Is there a way to release a locked up trunk remotely?