Tips and Best Practices for being On-Call
blog.pagerduty.com
blog.pagerduty.com
As the primary responder, your responsibility is to acknowledge any alert within a minute or so. Otherwise, the backup person would have to jump in.
To ensure "accountability," you may have a manager who would be a third backup and can escalate up from there.
Having a good device is important too though; if you sleep through or miss an alert, it may take another 10-20 minutes or so (depending on the escalation policy) before the alert escalates to the next person. This slack time could be pretty important depending on the severity of the problem.
So realize that whatever that ringtone is you'll associate it with this kind of anger: http://www.jeckels.com/photoDetail?PhotoId=4586&Category...
There was a time when the sound of my pager (or even my cell phone's SMS ringtone) would get my heart beating faster.
Maybe this would be a good ringtone for being on-call: http://www.youtube.com/watch?v=5bNE-5TVAmg