Recently installed IP office 500V2 that's using an analog station port for external page. The old switch was a Meridian MICS. The old connection apparently worked as is. When I connect the IP output it completely mutes the music without audio from the page. Tried inserting a WMT 1A in series, but it just blends in behind the music without muting. I think I need to insert a 1 watt preamp with the WMT. There is another module on the TOA with a RCA connector but it doesn't mute the music either with the WMT. It seems TOA doesn't have any tech support sites. Anyone have IP/TOA 900 experience? Thanks for any help!