I have used products like SCADAlarm, SCADAPhone, and Win-911 on projects in the past, but all are Windows based. Does anyone know of, and preferably have experience with, any Linux based products that provide the same dial-out alarm functionality? I'd prefer to keep this in software, and all on the same machine, rather than splitting it up or using a hardware dialer. Thanks.

I use pagerduty for some major alarms. It can be triggered via Email, and can call, email or text.

Pagerduty looks like a good service, but the problem I run into a good bit of the time is no Internet access at the customer's site, which is where a software-based notification system works perfectly. I will keep this in mind for future project though. Thanks, Kyle.