VISTA 21iPLTE vs. VISTA 21iP
The VISTA 21iPLTE and the VISTA 21iP are the same hardwired alarm control panel from from Resideo, only with one major difference. The VISTA 21iPLTE is capable of supporting the plug-in LTE communicators the LTE-21V and the LTE-21A, while the VISTA 21iP cannot support these modules.
In almost every possible aspect, the VISTA 21iPLTE and the VISTA 21iP are the exact same panel. They have the same number of zones (up to 64 total), the same general specifications, and the same add-on needs. Both have the same built-in IP communicator that allows for a hardwired ethernet connection. These panels only differ in the cellular communicators they support. In fact, if you never plan to use cellular communication with the system, then a regular VISTA 21iP will be no different to you than a VISTA 21iPLTE.
The difference between the VISTA 21iPLTE and the VISTA 21iP lies in the cellular communicators they support. The VISTA 21iPLTE can support the plug-in LTE communicators, the LTE-21V and the LTE-21A. These communicators were designed exclusively for use with the VISTA 21iPLTE System. No other system can support them. By adding one of these communicators to a VISTA 21iPLTE, you can continue to use the system's built-in IP communicator. This will make the system dual-path ready.
The VISTA 21iP Panel had its own plug-in communicator at one point. This was known as the VISTA-GSM4G. However, with the 3G/4G sunset, it is no longer possible to activate a VISTA-GSM4G. You now need to get an LTE communicator if you want to use cellular with a VISTA Panel. Currently, the only plug-in cellular communicators that can be activated for a VISTA Panel are the LTE plug-in communicators for the VISTA 21iPLTE. If you are trying to decide between a VISTA 21iPLTE and a VISTA 21iP, and you plan to use cellular communication with the system, make sure to get a 21iPLTE so you can use these plug-in modules.
If you have a standard VISTA 21iP Panel, then it still possible to use LTE cellular communication with the panel. It is just more difficult than using one of the plug-in LTE cellular modules that the VISTA 21iPLTE supports. In any case, adding an LTE communicator to a standard VISTA 21iP requires disabling the built-in IP communicator for the system.
If you just want cellular communication for a 21iP, and you do not care about IP connectivity, then you can get a Honeywell LTE-XA (AT&T LTE) or a Honeywell LTE-XV (Verizon LTE). If you want dual-path connectivity with both IP and cellular, you can choose between a Honeywell LTE-IA (AT&T LTE & IP) and a Honeywell LTE-IV (Verizon LTE & IP). If you use an LTE-IA or LTE-IV, you will technically still need to disable the built-in IP communicator for the VISTA 21iP System. But it will be okay, as the new communicator will provide IP connectivity.
Technically, you can use any of the aforementioned communicators with a VISTA 21iPLTE as well. This includes the LTE-XA, LTE-XV, LTE-IA, and LTE-IV. But there is no reason to do so, as you can just get a plug-in LTE-21V (Verizon LTE) or LTE-21A (AT&T LTE) module. These communicators are made exclusively for the VISTA 21iPLTE, and they do not require you to disable the built-in IP communicator for the system. They are much easier to install and more cost-effective than adding a full LTE-IA or LTE-IV.
Please note that as of this writing in late September 2019, the LTE-21V is available, while the LTE-21A is not. The LTE-21A is expected to be released sometime in the foreseeable future. For now, any VISTA 21iPLTE owner with adequate Verizon LTE coverage should just get that module. If you absolutely need AT&T coverage, then you will need to wait until the LTE-21A is released.
|IP Communication||Yes (built-in)||Yes (built-in)|
|Cellular Communication||Yes (add-on needed)||Yes (add-on needed)|
|Supports LTE Plug-In Modules||Yes - LTE-21V & LTE-21A||No|
|On-Board Hardwired Zones||8||8|
|Max Hardwired Zones||48 (Five 4219 Expanders)||48 (Five 4219 Expanders)|
|Max Wireless Zones||56 (wireless receiver needed)||56 (wireless receiver needed)|
|Key Fob Zones||16||16|
|Max AUI Devices||4||4|
|Partitions||2 (Partition 3 is common)||2 (Partition 3 is common)|
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