I changed out a blown-up Axxent for a 9.0 Axxess and kept the same phones (520.4300 except for a couple w/ display). Now I need more page port output. Another tech said that I could probably increase the output maybe with On-Line Monitor. I looked but did not see an obvious adjustment. The exsisting Wheelock amp already has the telephone input so high the speakers are humming. Thanks for the help.

Doesnt the Wheelock have an output adjustment (to your speakers)? From the Axxess, are you connected to the Page Port or a set of Speaker leads off a phone?

We have a couple of sites that we have had to add a pre-amp between the page port and the amp to deal with level issues. We use a small Bogen pre-amp. Helps alot but the volumn adjustment is very touchy.
Good luck.

You might also look at an RDL Stick-On ST-PA2.
https://rdlnet.com/product.php?page=109

Perhaps with an available slot for a used CO card you could program a port there.

Sorry - new here - don't know yet how to edit last post ... for the ground hum .. try putting a Radio Shack $3 isolation transformer inline on the audio. Easy to tap in, not polarity sensitive.