Does anyone know the pin connection on a MD amp. I need to install an additionnal amp for some outdoor speakers. I realize I will not be able to get door bell or paging. I have call Elan tech support twice, explained my application and can't get a return phone call, And my Elan MD book is long gone. Does Sonance still make an OP-3? then I could get the paging, I don't see it listed anymore in my product guide. Thanks Mark