Description
Know the instant an analog phone line goes down — before a failed emergency call exposes the problem — with the Viking LVR-1 Line Verification Relay, a compact monitor that watches line voltage and flips a built-in relay the moment the line dies.
The LVR-1 connects to any analog telephone line or PBX station port and continuously monitors line voltage. When voltage drops below a threshold indicating a line failure, the onboard relay switches state and can trigger an alarm, send a visual alert, or activate any device connected to the relay contacts. This makes it particularly valuable for monitoring emergency phones, area-of-refuge stations, elevator phones, and alarm system lines where a line outage could go undetected for hours. Installation is simple — no programming required, just connect the line and the relay output to your alerting device.
Our Expert Take: The LVR-1 is a low-cost, high-value monitoring add-on for any installation where line continuity is safety-critical. It's particularly useful for compliance in buildings where emergency phone lines must be continuously monitored — connecting the relay to a building management system or alarm panel provides automatic notification without periodic manual testing.
Key Features
- Monitors analog phone line voltage continuously
- Built-in relay switches on line failure
- Compatible with CO lines and PBX station ports
- No programming required — plug-and-play monitoring
- Relay output connects to alarms, BMS, or visual indicators
- Ideal for emergency phones, elevator phones, and area-of-refuge stations
Technical Specifications
- Monitoring: Analog telephone line voltage
- Output: Built-in relay (switches on line failure)
- Compatibility: CO lines and PBX station ports
- Programming: None required