Generally, for cellular devices, the industry measures the inverse in what is referred to as the Nine’s principle. For example, our devices operate between 2 and 4 Nine uptime. This translates to 99% and 99.99% uptime which is recorded within the same 30 day rolling average.  For example, the lower limit we see 99% translates to 430 minutes/month of downtime; while the upper limit 99.99% translates to 4.3 minutes/month of downtime. Our devices typically fall in this range each month whereby devices with clear line of sight to cell towers see minimal downtime. Conversely, very remote units, units surrounded by foliage, or at the base of drop-offs or hills will see more downtime.  What we find is that correctly calibrated units will reliably in this range. However, there are occasionally events such as cell tower downtime, excessive congestion, or permanent/temporary changes in cell service that can cause prolonged downtime events. We find a majority of planned cell carrier downtime is done late at night to mitigate service impact. Note: This range is for cellular only internet links. Redundancies can be put in place such as fiber, Wi-Fi, dual cell carriers, and more that can dramatically increase uptime. We commonly see 99.999% (0.43 minutes/month of downtime) or more for units with redundancies in place.