Unclejemima,
No one has ever asked me that before so I have never tried, but you could try dialing the extension for the page zone and see if that works to send a page. As for receiving one I would think that would be a no as I do not think those softphones are allowed in Page Zones, but you could try it since it does allow for softphones.
System > Devices and Feature Codes > Page Zones > Page Zone > IP / Digital Telephones
Thanks,
TE