Thanks to all, I purchased a refurbished station and punched it down to extension 308. I then connected the internal speaker to my PA amps and it worked fine.
I do have one other question. To page the PA circuit and all other stations at the same time, I need to dial 308 and then hit All Page. Is there a way to include station 308 in the All Page list?
Having station 308 as my PA output, offers a great option, to only page the PA circuit and not the internal stations.
Thanks again,