Honeywell LTEM-XA

AlarmNet AT&T LTE Cat M1 Communicator for VISTA

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The Honeywell LTEM-XA provides cellular connectivity for a Honeywell VISTA System. It communicates across the AT&T LTE Cat M1 Network. Installing and activating this module will allow your system to connect with the AlarmNet servers for monitoring service. Buy the Honeywell LTEM-XA here.
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The Honeywell LTEM-XA is an AlarmNet Communicator for any Honeywell VISTA System that supports ECP mode. This module works across the LTE Cat M1 network from AT&T. It replaces the Honeywell LTE-XA and offers superior security and signal penetration. All setup from the LTE-XA remains the same.

Cellular connectivity has been long-regarded as the single most effective communication path for an alarm system, and the AT&T LTE Cat M1 Network takes this to the next level. By using this communicator, you can ensure that your Honeywell VISTA Alarm System is able to consistently maintain fast and reliable connectivity with the Resideo AlarmNet Servers. As long as you are using the system in an area with good coverage from the AT&T LTE Network, then you should feel confident that your system will maintain reliable connectivity. And if you are in a more rural area, then you can usually compensate by adding a cellular antenna like the Honeywell CELL-ANT3DB, or a cellular amplifier to boost signals.

Another benefit to adding the LTEM-XA to your VISTA Panel is that it will allow you to set up Total Connect 2.0 service with your system, provided that the service is supported by your panel. Total Connect 2.0 is a remote interactive security and automation platform that allows you to control your system from pretty much anywhere in the world by using an app on your phone or a web browser. You can arm and disarm, check current system status, perform automation commands, and view any Honeywell IP Cameras you have set up, all from this convenient platform.

If you are interested in using the LTEM-XA to set your system up with Total Connect 2.0, remember that a VISTA-15P or VISTA-20P will need to be running a PROM Chip of 9.12 or higher to use TC2. PROM Chip upgrades for the 15P and for the 20P are available if needed. All versions of the VISTA-128BPT can support TC2, and any VISTA-250BPT running Version 10.3 or higher can support the service. Please note though that the VISTA-10P cannot support Total Connect 2.0, but you can still use the LTEM-XA to provide the system with general cellular alarm monitoring service for connectivity with a central station. Also see this FAQ that shows you how to check and replace PROM Chips.

When setting up the LTEM-XA, you will make a 4-wire connection between the panel and the communicator. Wiring is not included, so you must supply your own. We recommend 18-4 or 22-4 wire for this purpose, but you can easily double up some 2-conductor wire for this purpose, as long as you do not mix up the colors. The communicator will draw all its power from the alarm panel, so you don't need to worry about adding its own transformer or backup battery. Just make sure to consider the module's maximum current draw of 105mA when it is transmitting signals.

Keep in mind that the LTEM-XA must be activated for monitoring service after it has been installed. Since this is a cellular communicator, you must get a monitoring plan that includes cellular service. Examples of compatible plans includes the Gold and Platinum Level Pans from Alarm Grid. If you want to learn more about all of our monitoring plans, then please check out this comprehensive blog post.

Please note that this is the AT&T model. A Verizon LTE Cat M1 model called the Honeywell LTEM-XV is also available. Use whichever one works best in your area.


  • Product Type: AlarmNet Cellular Communicator
  • Compatibility: Honeywell VISTA Panels (ECP Panels Only)
  • Network: AT&T LTE Cat M1 Network
  • LED Status Lights: Yes
  • Tamper Detection: No
  • Mounting Hardware: Included
  • Current Draw (Standby): 26mA
  • Current Draw (Transmitting): 105mA
  • Operating Temperature: -4°F to 131°F
  • Operating Humidity: 0% to 95%, Non-Condensing

Brand: Honeywell Resideo

Honeywell LTEM-XA Compatible Products

Honeywell VISTA-10P - Alarm Control Panel
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Alarm Control Panel
Honeywell VISTA-10PSIA - Alarm Control Panel
Honeywell VISTA-10PSIA
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Honeywell VISTA-128BPT PCB - Commercial Alarm Control Panel
Honeywell VISTA-128BPT
Commercial Alarm Control Panel
List Price: $746.00
Our Price: $461.99
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