The 25th pair on each STN card is an external paging output. Connect the input to your amplifier there.
Go into programming and go to the "B" screen for "System Programming". Press "E" to take you to "External Zone". Zone 01 is on the first station card, Zone 02 is on the second station card, etc.
Enter a 2 digit number in the "Page" field to assign the page code (60 is allpage, 61 thru 69 are available as page zones).
go to a phone , dial your page code, adjust the volume, done
