The ELK-AEXDD is an advanced Digital Dialer/Dial Capture Cellular Interface Module for the E27 Alarm Engine. This innovative device utilizes cutting-edge cellular dial capture technology to establish direct, reliable communication to Central Monitoring Stations. With the ELK-AEXDD, you’re not just getting a communicator; you’re upgrading to uninterrupted, cellular-based communication that ensures your security system is always connected, always protected. The ELK-AEXDD also functions as a digital dialer for use with traditional landlines. It operates on the 4 wire data bus. The unit features a 8-pin modular phone connector, status/diagnostic LEDs, and convenient test points for lineman’s test set. Features: Compatible with popular dialer capture cellular communicators including Alula BAT-Connect, Napco Star Link, Telguard TG-1 Express, and M2M Services Operates from the E27 'RS-485' Data Bus Operating Voltage: 13.8 VDC Support Reporting Format: Contact ID Telephone Number Capacity: 2 Whats Included: Alarm Engine Digital Dialer/Dial Capture Cellular Interface Module Mounting hardware Instructions