If you have a stable internet connection, then yes..although some security companies won't allow it since it won't work in a power outage.. I have mine on a backup, cable modem, router, ooma, so everything works even when the house power goes down. Its funny sometimes to be on the internet in the dark. ;-)

That said, MOST telcos will offer a landline just for a security system. We switch a house in Palm Beach to that for year round, ATT (bell south) does it for 10$ a month.. it keeps the line just for the security system dial out, and satisfies the security company and the house insurance company so the service and rates remained static. That might be an option for you. you need to get a higher level of service advisor to enable it though and it often will require a service call - usually free - for a new line JUST to the security box. This is the same pricing in many markets as the "life line" type of service.