Use these instructions if you need to page all the people in an on call schedule. You need to build two profiles: one to store the list pager and the other for the on-call schedule.
The List Page profile should have a pager ID, and a primary pager (should be Frq Type %21 and Frq Number should be blank) with an Available Status
Create a Page List with the profile that has the on call schedule as the only member of the list. When you page the pager for the list the individuals in the current on call schedule will be paged