Alarm systems are not supported or recommended for use with RingCentral service. You can use the following options instead:
• A cellular phone connection. We recommend you to ask your alarm system provider on the possibility of using a cellular phone connection. Cellular adapters are typically supported by newer alarm systems and older systems may be converted by your provider for a nominal fee.
• An "Alarm Only" basic phone line offered by most local phone companies for around $10 a month. Contact your local exchange carrier for details about this option.