M Vista Dual Path US - AT&T
The ADC-SEM300-VT-AT-M is a System Enhancement Module designed to upgrade compatible Honeywell/Ademco VISTA alarm panels by adding modern LTE cellular and IP communication capabilities. This version operates on the AT&T LTE network and enables legacy wired security systems to be monitored and controlled through the Alarm.com platform. It connects directly to the panelÂ’s keypad bus and draws power from the alarm panelÂ’s 12-volt supply, eliminating the need for external power sources. The moduleÂ’s compact enclosure houses all necessary communication hardware, including LTE and Ethernet support, allowing for redundant dual-path connectivity. Designed for both residential and commercial installations, the SEM300 provides a cost-effective way to modernize an existing wired system without replacing the control panel.
- Enables AT&T LTE and Ethernet communication for VISTA alarm panels
- Allows remote arming, disarming, and system monitoring via Alarm.com
- Supports dual-path communication for enhanced reliability and redundancy
- Installs on the keypad bus and draws power directly from the alarm panel
- Provides Z-Wave Plus smart-home automation capability when integrated
- Modernizes existing wired security systems without replacing the panel
- Ideal for residential or commercial upgrades requiring LTE connectivity
The ADC-SEM300-VT-AT-M is ideal for upgrading outdated communication methods such as phone-line or older GSM/GPRS modules, enabling long-term support and improved reliability through LTE and IP connectivity. When paired with Alarm.com, users gain access to remote system control, mobile alerts, automation rules, and device management. The module also adds Z-Wave Plus capabilities, allowing integration of smart locks, lights, thermostats, and sensors through the existing VISTA panel. It is especially useful for maintaining a professional-grade wired security system while bringing it into the modern cloud-managed ecosystem. With dual-path failover, OTA updates, and easy installation, the SEM300 ensures strong performance and extended lifespan for legacy alarm systems.