Honeywell LTE-L57A LYNX LTE Communicator for AT&T

Honeywell LTE-L57A AT&T LTE Communicator for LYNX Touch

Overview

The Honeywell LTE-L57A is an internal cellular communicator module that adds AT&T 4G LTE connectivity to LYNX Touch alarm panels. It installs inside the panel enclosure via a bridge connector board, providing cellular alarm communication without adding external hardware. The module supports LTE bands 12, 13, 5, 4, and 2 with 256-bit AES encryption.

Deployment scenarios

The LTE-L57A is designed for residential LYNX Touch installations requiring cellular monitoring. It replaces legacy 3G/CDMA modules in L5200, L5210, and L7000 panels running firmware 9.00.201 or newer. The internal installation keeps the panel appearance clean without external communicator enclosures.

Communication specifications

Operates on AT&T 4G LTE across bands 12, 13, 5, 4, and 2. Encryption is 256-bit AES. Full Contact ID reporting format. Internal antenna. Standby current is 30 mA, with maximum transmit current of 490 mA.

Installation notes

The module draws 5 V directly from the LYNX panel. Dimensions are 4.75" x 2.5". Compatible with L5200, L5210, and L7000 panels with firmware 9.00.201 or later. Installation requires opening the panel enclosure and connecting the module to the internal bridge connector.

Eden Phillips

The LTE-L57A is the correct module for any LYNX Touch panel that needs AT&T cellular communication. I always verify the firmware version before ordering because the LTE-L57 series requires a specific minimum firmware that older L5200 panels may not have.

Technical Highlights:

• Internal installation: Mounts inside the LYNX Touch panel for a clean, self-contained installation
• Multi-band LTE: Supports 5 LTE bands for broad AT&T network coverage across different geographic areas

Deployment Considerations:

• Verify the LYNX Touch firmware version is 9.00.201 or newer before ordering since older firmware does not support the LTE-L57 modules
• Test cellular signal strength from the panel location since the internal antenna cannot be repositioned like an external communicator

For installations where the panel is in a basement or signal-challenged location, the VISTA platform with an external LTE-IA communicator and its larger antenna may be a better architecture choice.