Speaker is too loud on Avanti 3015H phone

Question

Intercom pages come through the speaker in my phone and are extremely loud. Is there a way to lower the volume or block the pages all together while still being able to recieve other calls?I saw nothing about adjusting volume of pages in the user manual and I have tried the "LoHi" button, which has lowered the ring volume, but has no effect on the speaker volume. The pages are not as loud on several of the phones in the office & don't come through at all on some of them (we've all got the same phones) but no one knows how they originally blocked or lowered the volume of the pages.Thank you in advance for your assistance.