I want to build an SMS alert system with a Vodem so my staff and I can be notified when certain systems fail on my network.  All my alerts are currently by email but it relies on a working SMTP server on my network and connectivity to the outside.  Using a Vodem means I can also be notified when our network connection is broken.

My plan is to use a PC / Laptop / server running windows, connected to my internal network to receive notifications by email (or SNMP), and with a vodem that will send txt alerts.

Is there any of such solution already available in the market?  I don’t want to reinvent the wheels if I can buy something off the shelf.