DMP 893A Dual Phone Line Module Keypad
Overview
The DMP 893A is a dual phone line supervision module that monitors main and backup phone lines for sustained voltage drops and alerts operators through a built-in sounder and keypad indication. Operating at 12VDC, this auxiliary module installs into the panel enclosure and connects via wire harness and phone cord. The 893A delivers real-time line-status feedback to both local keypads and the central monitoring station — critical in environments where communication loss during an alarm event can block dispatch. Use this when your system relies on dual phone lines and you need hardware-level supervision to catch line failures before an emergency call is needed.
Compatibility
The 893A integrates with DMP access control and security panels that support auxiliary module expansion. Installation requires compatible control panel hardware with available expansion slots and 12VDC power from the panel supply. Consult your panel documentation to confirm module slot availability and protocol compatibility before ordering. This unit belongs to the DMP modules-expanders catalog category and is designed for integrators deploying multi-reader systems or redundant communication pathways in enterprise, commercial, banking, and education environments.
Certification and Environmental
The 893A carries UL 864 listing for Control Units for Fire Protective Signaling Systems, plus FCC Part 15 and FCC Part 68 compliance. California State Fire Marshall (CSFM) and New York City Fire Department (FDNY) approvals are included for both household (CSFM 0134) and commercial (CSFM 0135) deployments. These certifications confirm the module meets life-safety standards for supervised phone-line monitoring in regulated installations.
