I have a new UCX250 install for a school with zone paging through a Bogen PCM module. (Needs DTMF tones to select the zone or do all call) Everything works great with a SIP paging interface or an ATA. However when I do a group page so the page comes through the phone speakers and external page system, the DTMF does not pass through. Any thoughts or ideas? I have not tried this with a UCX Mini yet.