Finding the CRC on a Honeywell-Resideo Wireless Alarm System

In this video, Jarrett from Alarm Grid helps you find the MAC CRC code on a Honeywell or Resideo Alarm System. This code is needed when activating the panel for alarm monitoring service. You need to provide this code to your alarm monitoring company. You may also want to keep it somewhere for later.

A CRC code is a redundancy check code that is used to make sure you did not make a mistake when entering the MAC address. Most Honeywell and Resideo Panels that can connect with AlarmNet360 through an IP connection will have a CRC code that needs to be provided. By requiring a CRC code, Resideo can make sure that the correct MAC address for the system is registered. You need to provide both the CRC code and the MAC address when activating your system for alarm monitoring service. Your monitoring company will likely ask you for the code during the activation process.

In some cases, the MAC address and CRC code will both be somewhere on the product box. However, an easier method for finding this code is often to look within programming. Most Honeywell Wireless Systems will have the code somewhere in programming. But you will need to provide the Installer Code to find it. Keep in mind that the default Installer Code for a Honeywell System is almost always 4112. The code is usually listed somewhere in the Comm Diagnostics Menu, often under Communication ID Numbers. That applies to the Lyric Controller and the LYNX Touch Panels.

Remember, you only need to provide the MAC and CRC codes if you are using the panel for IP monitoring service. If you are only using the panel for cellular monitoring, or if the system is unmonitored, then you will not need to provide these codes. However, you might want to store these codes in a safe place in case you ever need to access them later on.

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https://www.alarmgrid.com/faq/where-do-i-find-the-crc-on-my-honeywell-wireless-alarm-system