We had a very old (more than 20+ years) DSC alarm system that was in dire need of upgrading and the great folks at Alarm System Store helped me through the process of purchasing the right equipment and switching over to the new monitoring solution / company. The resources online including the system manuals and YouTube videos made if very easy for me to build and configure the new DSC system and activate it with the new monitoring service. I highly recommend Alarm System Store for all your parts and service needs. Great support and service staff from billing to shipping to system support.