Or you could use an SLT or trunk access a multi-zone paging interface - We use PGDAD's, but when you have 3, 4, or 5 different areas they want paged "separately," (and price may be an issue) just use a multi-zone paging interface...

If the account is blessed with several unused SLT ports, you could also put one on each port too (all page could be an issue at some sites)