Verizon LTE Cellular Communicators Posts

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An announcement on the AlarmNet360 page shows that they will send a remote reset command to some LTEM-PA, LTEM-PV, LTEM-PIA, and LTEM-PIV radios. This will occur today, Friday 04/15/22 between 2:00 pm - 3:00 pm ET. This may cause a trouble condition, and queued alarm reports could be sent.

It's unclear why this is being done. After a successful reset occurs, the radio will send an "E339-EXP. Module Power ON / Reset" message to the monitoring station. If the radio was in comm failure prior to the reset and any unsent alarm signals were queued, this reset may cause those alarm messages to be sent. These signals would show up immediately following the E339 signal at the central station. We assume this would also cause the same alarm messages to show up in Total Connect 2.0, and to be sent as notifications.

In addition, depending on how the panel is programmed, this event may cause the panel to display a bF or Check 103 message, and could also cause trouble beeping from the keypad. Disarming the system twice should clear the message and return the system to its normal state.

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Resideo has been investigating an issue with a very small number of communicators. The LTE-CFV, HWF2V-COM, LTE-IV, LTE-L3V, and VISTA-21IPLTE with LTE-21V. In a few cases, starting on March 19, 2022, the Verizon LTE SIM has become locked, causing a comm failure, or secondary path failure.


A device with this issue will show the following symptoms: Locally at the device, the LEDs will flash regularly at a rate of two times per second (see video above). Through AlarmNet360, the affected devices will have checked in normally for the period leading up to March 19, 2022. Then beginning on that date, or on a subsequent date through March 28, 2022, a comm failure will be indicated. Once the comm fail indication appears, it will not clear, so if you've had a comm failure during this time that has restored, then your communication failure is not being caused by this issue.

In addition to the above evidence of an issue, the alarm panel that the communicator is connected to will have a trouble indication displayed. This may come in the form of a Check 103, or a bF on VISTA-20P and similar panels, and also the L3000 panel. For the L3000 panel, the bF will only show on an RF keypad, such as the 5828 or 5828V, the panel itself will show Check or Fault 103. To silence any trouble beeping, enter a disarm command at any panel keypad. These trouble messages can be caused by other things, not just this issue, so if you see one of these error messages and think you may be affected, be sure to contact your alarm dealer for further assistance.

Bear in mind that only the communicators listed above are affected, and that these are all Verizon SIM Cards. If you have an AT&T Communicator, you needn't worry about this issue. Also, for those who have a dual-path communicator with Ethernet connected, you will not necessarily see a Communication Failure message. Instead you will be notified of a Secondary Path Failure. Again, if you are affected by this issue, once the failure occurs, it will not restore. So if you've received a Secondary Path Failure that has since restored, then you experienced a separate issue.

Again, if you feel that you have been affected by this issue, contact your alarm dealer. They can confirm if you are affected and will be able to assist you in receiving a replacement SIM. Alarm Grid customers who are affected have already been contacted and replacement SIMs are on the way. If any further information becomes available, we'll update this post with further details.

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If you use an Interlogix Alarm System with Alarm.com, then you can expect a firmware update for your system's LTE communicator. The firmware update will be automatic, and no action will need to be taken. Interlogix Simon Panels, NetworX Panels, and Concord4 Panels will receive the update.

If you haven't upgraded to an LTE communicator yet, then make sure to do so as soon as possible. The 3G Sunset is going to occur on January 31st, 2022 for AT&T and December 31st for Verizon. If you are not aware of the 3G sunset, then please read this blog to get acquainted. This upgrade is very important to ensure that you do not experience a loss of service.

We want to mention that each firmware update is just a general update designed to improve the user experience. Each update is being pushed down automatically, at no cost to the user. No action is needed on your end, just have your system online and connected with the Alarm.com servers, and everything will be taken care of.

Please note the update according to your Interlogix System:

  • Interlogix Concord4 - Firmware Update 189d
  • Interlogix NetworX - Firmware Update 189a
  • Interlogix Simon XT, XTi, XTi-5, XTi-5i - Firmware Update 191f

Additionally, if you use a Honeywell VISTA System with an Alarm.com SEM (not AlarmNet or Total Connect 2.0), then you will also be getting a pair of automatic system updates. All VISTA Systems using Alarm.com SEMs will receive the SEM VISTA 187i Upgrade and the 1.61 Firmware Upgrade. Again, both updates are automatic, and they are being provided at zero cost.

That's all the news for now. If you have any of the aforementioned systems on Alarm.com, then you can expect the automatic firmware update. If you are monitored by Alarm Grid and you are having any trouble with your system, please email support@alarmgrid.com. Please keep in mind our usual business hours of 9am to 8pm ET M-F.

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Alarm Grid is offering new Alarm.com System Enhancement Modules (SEMs) for Honeywell VISTA P-Series Alarm Panels. The ADC-SEM300-VT-AT (AT&T LTE & IP) and ADC-SEM300-VT-VZ (Verizon LTE & IP) are both available now. They provide reliable alarm monitoring and Z-Wave Plus capabilities.

If you aren't familiar with Alarm.com System Enhancement Modules (SEMs), they are basically cellular communicators that allow hardwired alarm panels to connect with the Alarm.com servers. The reason why SEMs for Honeywell VISTA Systems are so interesting is because normally these Honeywell-manufactured Alarm Panels are used in conjunction with the Resideo AlarmNet Servers and the Total Connect 2.0 Security Notification and Automation Platform. With an SEM, you can take control of your Honeywell VISTA Alarm Panel and instead have it communicate with the Alarm.com servers and the Alarm.com platform. Alarm Grid customers can choose from a variety of alarm monitoring plans to use with SEMs, including our Gold and Platinum Level Plans (Self & Full) and our Cellular-Only Plan. You can learn more about all our monitoring plans in this comprehensive blog post.

When you break-down what Alarm.com offers versus Total Connect 2.0, both platforms are remarkably similar. However, there are some cases where a user may prefer to go with Alarm.com over Total Connect 2.0. The biggest reason why we can think of is that the user wants to take advantage of the robust selection of Alarm.com Security Cameras. If you compare the selection of Alarm.com Cameras versus the Total Connect 2.0 Camera Selection, then it's clear that Alarm.com is (at least for now) the hands-down winner. Even if you aren't using security cameras in your setup, maybe you want a better integration with the Alarm.com Smart Water Valve, or maybe there's an Alarm.com Demand Response Program in your area that you want to take advantage of. In any case, if you have a VISTA P-Series Panel (e.g. VISTA-10P, VISTA-15P, VISTA-20P, VISTA-21iP, VISTA-21iPLTE), then an Alarm.com SEM will give you the option of using their services instead of AlarmNet and TC2.

When you compare the new "300-Series" SEMs with the previous VISTA SEMs, the ADC-SEM210-VT-AT and the ADC-SEM210-VT-VZ, the new ones have a couple of advantages. For one, the new 300-Series SEMs utilize much lower power consumption at just 230mA. The new modules also have the ability to be used without an external power supply, which was required with the older modules. In the setup without an external power supply, all of the power is supplied from the panel. However, you can still use an external power supply with the new SEMs if you do not have 230mA available from your panel. Also, the new 300-Series SEMs have new externally-facing LED status lights that are easier to read when needed.

Just like the prior editions, the new ADC-SEM300-VT-AT and ADC-SEM300-VT-VZ offer ultra-reliable connectivity across both an LTE cellular network and internet service using a wired ethernet connection. In addition, the new SEMs also return with Z-Wave Plus functionality, thereby allowing you to build a robust and complete smart home network around your security system. If you have been wanting to setup smart devices around your Honeywell VISTA Alarm System for use around the Alarm.com Security and Automation Platform, then these new SEM devices are perfect for the job at-hand. They are available right now and ready for use with Alarm Grid!

Do you have any thoughts about the new Alarm.com 300-Series SEMs, the ADC-SEM300-VT-AT and ADC-SEM300-VT-VZ? Would you consider switching over your Honeywell VISTA System to the Alarm.com Platform from Total Connect 2.0? Or maybe you're already happy with using your VISTA System with its current LTE cellular communicator? Let us know your thoughts in a comment down below. We would love to hear what you have to say. We always make sure to cover new product releases and the latest security system news, so make sure to stay tuned to the Alarm Grid Home Security Blog for more great content coming soon!

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This is just a friendly reminder that the 3G and CDMA Sunsets are still on-track. The AT&T 3G Sunset occurs January 31, 2022, while the Verizon CDMA Sunset occurs December 31, 2022. Alarm Grid can help you take action and make a transition to newer LTE hardware, or make alternative plans.

The 3G and CDMA Sunsets go beyond the alarm industry. Older cellular technology is being shut down and will no longer work. This is being done to transition resources to newer and more advanced cellular technology that will provide more effective service for users. After the shutdown, only 5G and 4G LTE will remain active as major network bands. Once your alarm system is set up with LTE, you will have a trustworthy and reliable communication path for many years to come.

You may have to start thinking about the 3G or CDMA Sunset if you have an older alarm system that is still using a 3G or CDMA Communicator. By the time the Sunset occurs and the associated cellular network is shut down, you will either have upgraded to newer technology, or your hand will be forced and your system will no longer be monitored.

The following outcomes are possible for any user with a 3G or CDMA Communicator:

  • Upgrade to a new alarm panel entirely, namely one that will support LTE, or a Honeywell Panel or Resideo Panel that is IP Only.
  • Keep the existing alarm panel, and upgrade its 3G or CDMA Communicator to a new LTE Communicator that will allow it to stay monitored.
  • Downgrade to IP-only monitoring service. This is not possible for any system that uses Alarm.com.
  • Terminate all monitoring service for the panel. It can still be used as a local sounder, but it will not report signals.

Users with 3G and CDMA Communicators who do not take any action will be subject to that last option. Once the 3G or CDMA Network is shut down, the panel will lose network connectivity, unless it is a Honeywell Panel configured for internet connectivity. A system that loses all connectivity due to a permanent network shutdown can still be armed and disarmed, but it cannot send any signals to the central station, meaning that no help can be automatically dispatched. The system also won't send notifications to Alarm.com or Total Connect 2.0, and the user won't be able to control their system remotely from one of those platforms. Also, the user will not be able to maintain an active Certificate of Alarm (CoA) for a discount on their homeowner's insurance. Only actively monitored systems are eligible for a CoA.

Many users aren't even aware that their systems have 3G or CDMA Communicators that need to be upgraded. There are ways to tell if your communicator needs to be upgraded, but it may be difficult for someone who isn't trained to tell. If you have an older security system that you think may be in need of a communicator upgrade, then we can help you. Reach out to our team at support@alarmgrid.com, and we will work with you to make sure that you are ready for the 3G or CDMA Sunset. Depending on your situation and the equipment, we will advise you to do one of the following.

  • Upgrade to a panel that can support LTE Cellular.
  • Upgrade the communicator for an existing panel to LTE Cellular.
  • Certain Honeywell Panels can be downgraded to support IP-only so that you can stay monitored using the equipment you already have.

Do you have any questions about the 3G or CDMA Sunset? Maybe you have already upgraded, and you want to let us know about your experience? Or maybe you have been putting off upgrading and are waiting until the last minute? We would love for you to leave a comment down below to let us know how you are preparing for the 3G or CDMA Sunset in your home or business. This is a major event for the security industry, and it's happening very soon. Stay tuned to the Alarm Grid blog for more security news and updates on the 3G and CDMA Sunset, as we all transition to LTE.

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There is going to be scheduled maintenance occurring on Alarm.com tonight, specifically focusing on the Verizon infrastructure. The maintenance period will run from 12:00 am Midnight to 2:00 am Eastern Time. According to Alarm.com, no impact is expected with regard to monitoring service.

The purpose of the scheduled maintenance is to enhance platform stability and improve redundancy moving forward. We have heard reports that a small number of Alarm.com Verizon LTE Communicators have been experiencing some relatively minor technical issues. Alarm.com has been aware of these issues since at least last Saturday, and they have been actively working to troubleshoot affected units to prevent any disruptions in service. The scheduled maintenance tonight should fix these issues and help to ensure that all Alarm.com Verizon Communicators function as intended, with exceptional reliability.

During the scheduled maintenance period tonight, Alarm.com says that service outages are unlikely to occur. You should not experience any problems if your security system uses a Verizon Communicator for connecting with Alarm.com. However, Alarm.com is not ruling out the possibility, and they want to keep users informed, just in case. Remember that if you have an IP (WIFI or Ethernet) communication path set up, then that can serve as a valuable backup option tonight during the maintenance period. If your system is cellular only with Verizon connectivity, then just be careful if you need to arm your system tonight between 12:00 am Midnight and 2 am Eastern Time. Again, no issues should occur, but Alarm.com is performing due diligence by making the maintenance period known in advance.

Once again, all maintenance taking place is on the Verizon infrastructure for Alarm.com. Your monitoring service will not be affected in any way if your system uses a different carrier, such as AT&T, for connecting with Alarm.com, or if your system is set up with a different network, such as AlarmNet for Total Connect 2.0, or Telguard for HomeControl Flex. If your system does use Verizon connectivity for communicating with Alarm.com, then check and make sure your WIFI or Ethernet path is working as an important backup plan for tonight. If you have been using your system with cell-only on Verizon with ADC, but you have the option to add WIFI or Ethernet, now may be a good time to do so. Your system should still be fine, but, it never hurts to use redundancy when it is available. Stay tuned to our blog for more security system news and updates coming soon.

Note: If you are reading this after 2:00am on April 14th, or on any future date, then it is assumed that the scheduled maintenance has been concluded, and all Alarm.com Verizon Service should be operating as intended, now with improved infrastructure.

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Alarm Grid is here with a video recap! We have four (4) new videos this time, all featuring myself. We have cellular communicator installation videos for the 2GIG GC2 and GC2e and some videos explaining the use of thermostats on Alarm.com. Let's check out the latest Alarm Grid videos!

Upgrading the 2GIG GC2 to LTE

I show you how to upgrade the 2GIG GC2 to LTE. There are two (2) LTE communicators currently available for the 2GIG GC2. These are the 2GIG LTEA-A-GC2 AT&T LTE Communicator and the 2GIG LTEV1-A-GC2 Verizon LTE Communicator. Upgrading to LTE involves removing the system's old 3G or CDMA communicator and installing a new LTE module in its place. It is very important that you do this before the 3G Sunset to prevent any disruption to your monitoring service.


Installing a Cellular Communicator Into a 2GIG GC2e

I show you how to install a cellular communicator inside of a 2GIG GC2e. The 2GIG GC2e Security System does not come with any available communication path by default. You must add a cellular communicator to get the GC2e monitored. The communicator will connect the system with the Alarm.com servers. Alarm.com then forwards important information, such as alarm events and system trouble conditions to a central monitoring station and/or the end user directly via text message and/or email.

ADC-T2000 and ADC-T3000 Thermostats Work with Alarm.com

I explain how you can use the Alarm.com ADC-T2000 Thermostat and Alarm.com ADC-T3000 Thermostat with the Alarm.com interactive platform. Both the ADC-T2000 and ADC-T3000 are Z-Wave Plus thermostats that pair with virtually any Z-Wave controller or hub. If that Z-Wave hub also happens to be an Alarm.com Security System that is actively being monitored, then the thermostat will be automatically pushed over to the Alarm.com platform after it has been enrolled with the system and the system syncs with Alarm.com.


Adding the ADC-T2000 to an Alarm.com Account

I show you how to pair the Alarm.com ADC-T2000 Thermostat with your Alarm.com account. The ADC-T2000 is a Z-Wave device. Like most Z-Wave devices, when you pair it with your Alarm.com Security System, the device will be automatically pushed over to your Alarm.com account the next time that your alarm system performs an automation sync with the server. You will then be able to control the thermostat remotely through the Alarm.com website and mobile app and include it with Alarm.com Smart Scenes.

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Alarm Grid is updating all of our monitored 2GIG GC2 panels. If the panel has a firmware version older than 1.19.3.1 and it needs a new communicator, then an over-the-air (OTA) update will be pushed to update it to 1.19.3.1 which will support any LTE comm. The update will cause a reboot.

Alarm Grid is committed to making sure none of our customers are left behind when the AT&T 3G and Verizon CDMA sunsets occur. Toward this goal, we have decided to proactively push a firmware update to each of our customer's 2GIG GC2 panels that are monitored through Alarm.com. The 2GIG GC2 can be a little tricky to update, and pushing the update OTA is by far the easiest way to accomplish this task.

If you are an Alarm Grid monitored customer who has a 2GIG GC2 panel on Firmware 1.19.3.1 or older with a pre-LTE communicator, you won't need to do anything special. The update will be pushed from the Alarm.com server and should occur automatically the next time your system is disarmed with no trouble conditions. As a part of the update, the panel will perform a reboot, and when it boots back up, it is likely to speak the current status. This is a normal part of the update process.

If you'd like to check the firmware version of your system then follow these steps. The purpose of this particular upgrade is to be sure any customer with a panel that doesn't currently support an LTE communicator will be able to do so. If your system already has an LTE communicator, even if the panel is not on the most recent Firmware, then no update will be sent. This is because you already have a Firmware version that supports the LTE communicator you're using.

Here's a breakdown of the 2GIG GC2 Firmware requirements:

Cellular Module Type Panel Firmware Required
Verizon LTE or VoLTE (2GIG-LTEV-A-GC2)

Note: This communicator is no longer available

1.17+
Verizon LTE CAT1 (2GIG LTEV1-A-GC2)

Note: This module is available only to United States Customers

1.19+
AT&T LTE (2GIG-LTEA-A-GC2) 1.19.3+

As always, if you have any questions the best way to reach us is by emailing support@alarmgrid.com. Remember that our support hours are M - F from 9:00 am to 8:00 pm Eastern Time. We offer no-contract monitoring at reasonable prices and world-class technical support to our monitored customers. We look forward to hearing from you!

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We have learned that Verizon has confirmed the sunset date for their CDMA Network for December 31, 2022. This is Verizon's equivalent of the 3G Sunset. Anyone with a security system using a Verizon CDMA Communicator is urged to upgrade to LTE ASAP to avoid monitoring service disruptions.


The 3G Sunset has been covered extensively on the Alarm Grid Blog. It refers to the phasing-out of old 3G and equivalent communicators, in favor of newer technology, specifically LTE. The Verizon CDMA Network is the Verizon equivalent of a 3G Network. While AT&T is known to be shutting down their 3G Network after January 31, 2022, the Verizon CDMA Sunset date it a bit later at December 31, 2022. While there was earlier confirmation by Resideo for the CDMA shutdown date, this time the confirmation is directly from Verizon themselves.

In preparation for this major event, Alarm Grid has been encouraging users to replace their old 3G and CDMA Communicators with newer LTE communicators. Users are strongly advised to upgrade to LTE as soon as they can. While it's understandable to wait until the last minute, especially if money is tight, you should realize that many other users will also try to wait until the final opportunity. Our support staff is limited, and we cannot upgrade everyone all at once. If you put-off the required upgrade as long as possible, then there's a chance you might get left behind at the deadline. Our goal is to prevent that from happening and ensure that all Alarm Grid customers with cellular monitoring service make a seamless and undisrupted transition.

We know that the 3G Sunset might still be a bit confusing, and you might still have some questions. That's okay, because we're here to help you. If you aren't sure about the LTE communicator replacement options available for your system, then you may want to check this post for some further assistance. If you have recently purchased a new LTE communicator for your system, and you need us to activate the unit, then head on over to the Alarm Grid Communicator Replacement Portal so that you can choose a time that works for you. And if you have any other questions, or if you are still confused about the 3G and CDMA Sunset, please email our support team and security system experts at support@alarmgrid.com. We're here to answer your emails from 9am to 8pm ET M-F. We look forward to hearing from you!

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Alarm Grid is proud to announce that the Honeywell LTEM-XA and Honeywell LTEM-XV are now available! These are both brand-new cellular communicators for VISTA Systems. They follow the same installation process as the LTE-XA and LTE-XV, which are being phased out in favor of these new models.


What separates the LTEM-XA and the LTEM-XV from their predecessors is that they connect with the advanced LTE Cat M1 networks. These networks allow for stronger security and more effective signal penetration than other LTE cellular networks. The LTEM-XA receives service from the AT&T, while the LTEM-XV is covered by Verizon. As usual, the decision to go with one over the other has nothing to do with your personal phone, and it will have no impact on the cost of your monitoring service.

It should be noted that the older LTE-XA and LTE-XV will still continue to work as intended. Anyone using one of these modules does not need to upgrade to a newer model or replace their existing equipment. In fact, there is very little reason to do so if your system is working as intended. You can confirm that your communicator is receiving a strong cellular signal by checking the Signal LED on the front of the module. A solid green light indicates a strong signal. It's also worth mentioning that the LTE-XA and LTE-XV will continue to remain available for purchase while stock remains of these products. However, there is little reason to buy them, as the LTEM-XA and LTEM-XV are now the recommended models.

One other important note about the LTEM-XA and LTEM-XV is that they offer cellular connectivity only. These are not dual-path communicators, and they do not provide internet connectivity. This is not a huge concern, as LTE Cat M1 service is plenty fast and extremely reliable on its own. But if you do want a dual-path option for your Honeywell VISTA System, then the Honeywell LTE-IA (AT&T LTE & IP) and the Honeywell LTE-IV (Verizon LTE & IP) are still readily available. Just remember that the LTE-IA and the LTE-IV only use "standard" LTE connectivity, as opposed to the LTE Cat M1 service offered by the LTE-XA and LTE-XV. It is currently unknown if Resideo will eventually release dual-path communicators that utilize LTE Cat M1 connectivity. Like always, we promise to keep you informed about any updates.

The function of the LTEM-XA and LTE-XV remains largely the same from other AlarmNet Communicators. By installing and activating one of these modules, your Honeywell VISTA Security System will be able to communicate with the Resideo AlarmNet Servers across a fast and reliable LTE Cat M1 cellular network. If your alarm panel supports Total Connect 2.0, then you will be able to take advantage of that great service as well, provided that access to the TC2 platform is included in your monitoring plan. Remember that a VISTA-15P or VISTA-20P System must have PROM Chip Version of 9.12 or higher to support Total Connect 2.0. We sell PROM Chip Upgrades for the 15P and for the 20P if you need them. Please also refer to this FAQ on identifying and replacing PROM Chips.

While the 15P and 20P are most likely going to be the most commonly used systems with the LTEM-XA and LTEM-XV, you can technically use these communicators with any Honeywell VISTA System that supports ECP mode. Please feel free to contact us with any questions you have regarding system compatibility. You are also welcome to contact us if you are interested in starting new monitoring service. Our team is happy to help you get started. The best way to reach us is to email support@alarmgrid.com. We're here to check your emails from 9am to 8pm ET M-F. We look forward to hearing from you!

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