Viking Electronics K-1900-4 Programmable Pulse Dialer

The Viking Electronics K-1900-4 programmable pulse dialer is a line-powered device that automatically dials preprogrammed telephone numbers when triggered by alarms, sensors, or control systems. Designed for security and monitoring systems, it is commonly installed in security systems, industrial monitoring equipment, emergency notification systems, access control installations, and remote alarm applications requiring reliable telephone-based event reporting. Key specifications include non-volatile EEPROM memory for programmable telephone number storage, support for alarm and event reporting over standard telephone lines, and industrial‑grade construction built for continuous standby operation; the unit retains its programming during power loss. Manufactured by Viking Electronics, the part number is K-1900-4, with common replacements including the K-1900-5 Emergency Dialer and the K-1900-IP VoIP Dialer for alternative communications paths. It is well suited for replacement, retrofit projects, communication system upgrades, and new alarm system deployments in OEM control equipment and building automation contexts.