# RAD Types

Digital RADs provide reliable service under severe conditions and are recommended for all installations. The less expensive electromechanical tape RADs are subject to variations in operation and unreliable performance. Constant use wears out the mechanical components of the device forcing repair or replacement at regular intervals.

Related Topics

- RAD Description

- RAD Groups

- RAD Failure Detection

- RAD Maintenance

- RAD Front End Messaging

- RAD Testing

- RAD - Attendant Overflow