Alarm.com ADC-SEM340-VT-TL Alarm Communicator

Maximize uptime and simplify monitoring with the Alarm.com ADC-SEM340-VT-TL System Enhancement Module (alarm communicator) — a dual-path LTE/IP solution designed for commercial and residential security installations. This Alarm.com communicator adds robust 4G LTE cellular backup combined with IP connectivity to maintain continuous alarm reporting and remote surveillance, so monitoring centers and on-site personnel receive events without delay. The SEM module is purpose-built to integrate with Honeywell/Ademco VISTA panels (10P, 15P, 20P, 21IP) — note specific panel revision requirements for full broadband support — and disables competing communicators to provide a single, reliable path for signal transmission. At just 4.35" wide and finished in discreet white, it mounts inside the control enclosure for a clean installation that preserves cabinet space. Ideal for installers and integrators who need dependable monitoring, improved connectivity, and simplified compliance, this Alarm.com alarm communicator supports faster alarm verification, remote system access, and reduced false alarm risk. Upgrade your security and surveillance infrastructure — order the ADC-SEM340-VT-TL or contact our sales team to plan integration with your VISTA panel.

• Provides reliable dual-path LTE/IP communication to keep alarms connected even if one path fails
• Integrates seamlessly with Honeywell/Ademco VISTA panels to enable remote monitoring and faster alarm response
• Cellular 4G LTE connectivity reduces dependence on landlines and ensures continuous security surveillance
• Compact, low-profile white module installs inside the control cabinet for a professional, discreet setup
• UL-listed and environmentally friendly design supports code compliance and long-term system stability