Change Page termination time?

Is there a way that I can set a paging group to terminate after a set amount of time. (no paging pro)

I need to set a recording for a class change bell. I have everything set how I want to have it. However, the call either automatically terminates too early, or too late.

What if you make the recording that’s played near the exact amount of time you’re looking for?

It already is the exact time I am looking for…