I have a Valcom 5100 phone system and using ADix admin phones. (IX-12KTD-2). Three of the multipurpose buttons were previously setup to do all calls to 3 differetn page groups. We upgraded our system to 5100 with enhanced features. The call groups use to be #12(for example) and now the multipurpose buttons need to call #112. I do not know how to reprogram these buttons and can not find it any of the manuals.