Description
Never miss a voicemail again — the Viking LM-1A is a compact message waiting lamp that plugs directly into your phone jack and lights up the moment your phone system signals a waiting message, giving you a clear visual alert without relying on an audible ringer.
The LM-1A works with any telephone system that uses standard DC message waiting voltages from 90VDC to 120VDC. The built-in LED blinks steadily when a message waiting signal is detected and flickers when the phone rings — so you always know what's happening at a glance. Fully modular for quick plug-in installation, no telephone experience required.
Our Expert Take: Simple, reliable, and broadly compatible — the LM-1A is a practical add-on for any desk that needs a visual message alert. Note that it is not compatible with AT&T phone systems. If your system uses a different message waiting signaling method, verify the voltage before ordering.
Key Features
- Compatible with any phone system using 90–120VDC message waiting voltage
- LED blinks steadily when a message waiting signal is detected
- LED flickers when the phone rings
- Fully modular — plugs directly into phone jack, no tools needed
- Easy retrofit mounting
- Not compatible with AT&T phone systems
Technical Specifications
- Message Waiting Voltage: 90VDC to 120VDC
- Indicator: LED (steady blink = message waiting, flicker = ringing)
- Installation: Fully modular, plug-in
- Incompatibility: AT&T phone systems