Overview
AlarmNet LTE communicator — cellular module for Total Connect 2.0 and central station reporting (LTE-X/C/V, LTEM-XT, LyricLTE, ProSeries LTE, etc.).
Without reliable cellular reporting, remote arm/disarm and central station signals stop when phone lines or broadband fail. Match the exact module SKU to your panel model and dealer platform before truck roll.
At a Glance
| Specification | Details |
|---|---|
| Role | Cellular AlarmNet path |
| Carriers | AT&T, Verizon, Bell — SKU specific |
| Platforms | Total Connect 2.0; central station via AlarmNet |
| Install | Panel-specific mounting and antenna routing |
What This Device Does Well
Provides reliable supervised status at the panel and Total Connect 2.0 when installed, enrolled, and range-tested correctly.
Before You Service or Replace One
- ICCID and carrier — verify active SIM on correct network.
- Module-to-panel pairing — VISTA vs Lynx vs ProSeries vs Lyric slot compatibility.
- Antenna path — internal vs ANT5XL external routing.
- Dealer platform — Total Connect 2.0 activation tied to specific module SKU.
Official Sources
- Resideo product page
- LTE Family Data Sheet (English)
- USA-Radio-Replacement-Chart.pdf
- AlarmNet Communicator Compatibility Chart
Use official Resideo install PDFs and install guides for exact wiring, enrollment, and firmware — specifications vary by SKU and region.
Need more help with this model?
We have not published model-specific troubleshooting for the Honeywell Home LTE-21V 4G LTE Communicator for VISTA21PLTE (Verizon) yet. The manufacturer's installation and user manuals are the most reliable source for wiring, programming, and trouble codes.