Im not even sure anyone manufactures pagers anymore. Motorola was the big name in pagers, but they quit making them about 3 years ago. Metrocall and Arch Communications were the big names in paging. I dont know if either is around anymore. The hospital I work at uses a voice pager system. I think the thing is almost as old as I am. Hopefully none of these pagers ever break, because I dont think they could replace them. I sure wish they would go to blackberrys. Thats what my father-in-laws work has done. They repalced their pager system with blackberrys. Im sure it took a while for all those old facilities guys to get the hang of them, but I know at least my FIL likes his. He knows exactly where he has to go and what he has to do. And if he is out, he never has to find a phone to call anyone back. Of course, if your company is too cheap to pay for cell phones, they sure as heck most likely wont pay for Blackberrys and BES.
Would your company purchase one or two cell phones that could be checked out to whoever was on call. I know someone mentioned Nextel. I worked for a company that gave us nextels. They had them set up to where we could only use the radio and not the phone. As well, we had a system that would dispatch us using text messages on the radios. What about partial cell phone reembursement for everyone who is on call? Even if there are those who dont have cell phones, there are alot of prepaid phones you can keep active for about $10/month, which is what pager service would cost at the bare minimum.
The greatest trick the Devil ever pulled was convincing the world that Larry the Cable Guy is funny.