Whenever someone does a "Simultaneous Page" (I*70) The volume of the page over the system phone speakers is WAY too loud..

You can adjust the volume during the page. But the system doesn't seem to remember the volume level once the page is over. When someone performs another page, the volume returns to its previous level.

Is there a way to set the volume permanently?

Since the simultaneous page comes over the phones as a intercom call, I would press the intercom button while on hook, then adjust the volume. We have run into this before, and it seems that when you adjust speaker volume while listening to intercom dialtone, it has taken care of the problem.