AJAX Alarm System Review: Ajax Rex Signal Range Extender [9/15]

The device that looks identical to Ajax Hub, and I guess Ajax just took the Hub body, got out some “brains,” and here you go, Ajax Rex. Seriously, you have probably seen a signal area extender before, but it all concerned an internet signal, and here it’s about extending the area of radio communication, under which the entire Ajax Systems operates. We’ll tell you what it is, why it is, and we will construct it within our Ajax Hub.

Ajax Rex, The Introduction

After Ajax got out the brain from Hub, they have replaced that formed empty space with a battery, which is confirmed on the box back, where it’s up to 35 hours against up to 15 hours for Ajax Hub. And what else did they, they have cut out? The RJ-45 LAN input. The rest is identical, and we also have a cardboard brick, containing a power cable. So, what is the Ajax Rex?

Simply, a radio signal range extender. And due to the fact that the entire Ajax Alarm System operates and transmits the data from sensors via radio waves and a dedicated Ajax Jeweller radiotechnology, this is quite an important thing to have, if the area to cover is large. Ajax Rex creates an additional radio point within an operating range of 1,800 meters, which is 200 m. less than the area that Ajax Hub creates. It supports up to 149 sensors connected simultaneously. The polling period rate here is common for Ajax Devices, and it makes up 12 to 300 seconds. The time needed to transmit a threat signal is 0.3 milliseconds. And thus we have a chain. Below you can see a Hub, a MotionProtect Sensor, and an Ajax Rex device that we’ve put among them. And actually, if the connection with a HUB gets interrupted, REX is smart enough to take control of connected sensors on him, and thus, I suppose they have left some brains in there.

Activation & Connection

The connection. Well, no different from any other sensor. You've got to have a Hub online and activated on the Ajax App on your phone. Here’s a video:

Conclusion

I would call this not just a signal extender, but also a backup option for situations when the central Hub unexpectedly shuts down. If the power goes out and the Hub’s built-in battery is depleted, Ajax Rex takes over and continues to monitor threats for up to 35 hours on its own battery. And it costs about two to three times less than the Ajax Hub. If you are securing a large property, this is a must-have device.