To register the GSM in your security system, contact the alarm monitoring company, and provide them with the MAC address and the MAC CRC for the unit. The alarm dealer will then activate your account with appropriate features for the plan you've chosen, and help you test communication. Complete the following steps to register the GSM in your security system: 1. Obtain a cellular monitoring plan. In order to use a GSM cellular communicator with your panel, you will need to choose a cellular monitoring plan from your alarm dealer of choice. If you don't already have a cellular monitoring plan, contact your alarm monitoring company, and let them know that you would like to upgrade your plan to include cellular monitoring. Alternatively, you can also start service with a new monitoring company and let them know that you would like for your plan to include cellular monitoring. 2. Install a cellular communicator. If your system does not already have a cellular communicator, you will need to install one into the panel. When purchasing a cellular communicator, make sure that it is compatible with your security system and that it will provide you with speeds that are fast enough to meet your needs. Depending on which communicator you choose, you may need to install certain firmware updates to your panel so that it is compatible with the new communicator. Before installing the communicator, you will want to note its MAC address and CRC code. This information will typically be found on a sticker on the communicator itself. It may be helpful to take a picture of it. Once you have the MAC and CRC, you can proceed with installing the communicator to the system. Many newer panels have a slot where a communicator can be inserted. Other panels will require to to hard-wire the communicator to the system. Follow the installation steps specific to your panel and communicator. 3. Register the communicator. Once the communicator has been installed, contact your monitoring company and let them know that you would like to activate your communicator. They will need to know the MAC and the CRC for the communicator. Provide them with this information, and they will send a signal to the communicator to activate it. In some cases, the radio may need to be power cycled as part of this process. For this reason, plan to be on site during the activation. Your monitoring company will let you know when they have successfully activated the communicator. 4. Check the status. You can check the status of your communicator to make sure that it is working properly. The actual process will vary between systems. Most newer wireless panels have an information screen that will display the status of the communicator. Your monitoring company representative should walk you through verifying that the system is communicating properly.