Dealing with weak ringing or dropped calls on long cable runs from your PBX or KSU? The Viking LLA-1 solves both problems in a single, no-programming-required unit by converting any low-voltage analog station port into a full-strength 48V line with clean 20 Hz sine wave ringing. Whether you're extending service to a remote building, setting up an off-premise extension, or simply trying to get reliable phone service past the limits of your existing equipment, the LLA-1 handles it all without complicated setup. It passes Caller ID, hook flash, and CPC signals transparently, electrically isolates your PBX or KSU from the extended loop, and adds dedicated lightning and surge protection for extra peace of mind. Just install it and your phones ring loud and clear again. Selectable ring protocols give you flexibility across different equipment types, and the included UL-listed AC adapter means everything you need is in the box. It also serves as a direct drop-in replacement for the discontinued Proctor model 46222, making it a practical upgrade path for legacy installations. Our Expert Take: What sets the LLA-1 apart from a basic ring booster like the Viking RG-10A is that it addresses both low talk-battery voltage and weak ringing in one unit — you're not just amplifying a weak signal, you're replacing it with a proper 48 VDC line. That distinction matters a lot on long copper runs to outbuildings or remote offices where talk quality suffers just as much as ringing. The 1500 VDC electrical isolation is a real bonus if your extended run crosses any outdoor distance where surge exposure is a concern. Key Features Converts any low talk-battery analog station port into a full 48 VDC standard telephone line Generates a clean 20 Hz sine wave ring signal at 105 VAC nominal — rings up to 10 REN load Passes Caller ID, hook switch flash, CPC signaling, pulse dialing, and DTMF touch-tone without interruption Electrically isolates the PBX or KSU from the extended loop with 1500 VDC isolation Built-in lightning and surge protection with dedicated ground screw Selectable ring protocols to match a wide range of equipment No programming or configuration required — plug-and-play installation Direct replacement for the discontinued Proctor model 46222 Extends 200–500 ms hook flash signals to a consistent 500 ms for reliable feature activation Technical Specifications Power: 120V AC to 13.8V AC 1.25A UL-listed adapter (included) Talk Battery: 48 VDC minimum Ring Generation: Sine wave 105 VAC @ 20 Hz, 10 REN load Isolation: 1500 VDC Audio Loss: 1.3 dB Dialing: Pulse (10 pps) and DTMF compatible Hook Flash: Extends 200–500 ms flashes to 500 ms Connections: 6 screw terminals + ground Dimensions: 5.25″ x 3.5″ x 1.75″ (133 mm x 89 mm x 44 mm) Operating Temperature: 32°F to 90°F (0°C to 32°C) Shipping Weight: 3 lbs (1.36 kg) Approvals: FCC Part 68, FCC Part 15, Facility Interface Code OL13C
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