3-MODCOM

The Edwards 3-MODCOM is a modem communicator (dialer/DACT) module for EST3 fire alarm systems, providing off-premise reporting via two supervised telephone lines with V.32bis 14.4K modem and TAP pager support.
It mounts on the local rail chassis, supports SIA DCS/Contact ID/3-1/4-2 protocols, and offers degraded mode operation during CPU/network failures with default alarm transmission.
Key Specifications
Feature
Specification
Type
Two-way modem/DACT rail module ​
Telephone Lines
2 loop-start (RJ-11 modular jacks) ​
Protocols
SIA DCS, Contact ID, 3/1, 4/2 pulse; TAP pager ​
Modem
V.32bis 14.4K full-duplex DSP ​
Power
24 VDC from system supply ​
Mounting
Single local rail slot (any EST3 panel/node) ​
Features
Remote firmware/config updates, CPU failure degraded mode