Description
Tired of phones that barely ring—or don’t ring at all—on your multi-line phone system? The Viking RG-224 is a reliable 24-line ring booster and shaper that turns weak or square-wave ringing into a strong, clear true sine wave ring.
It handles up to 24 analog PABX extensions, FXS ports, or IP phone system analog ports at once. Each line can now power four 1 REN phones or eight 0.5 REN phones without messing up caller ID, call waiting, or any other features. Perfect for offices, hotels, schools, or any setup where you need dependable ringing across many lines.
Our Expert Take: If you manage 12 or more analog lines and hear complaints about missed calls, this unit pays for itself fast in reduced frustration and better responsiveness. It’s built tough, runs cool, and stays out of the way in a standard 19” rack space. We recommend it especially for anyone using the Cisco VG series or similar 24-port gateways. Pair it with quality analog phones and you’ll rarely hear “I didn’t hear my phone” again.
Key Features
- Boosts ringing power to 4 REN per line (four 1 REN or eight 0.5 REN phones)
- Converts troublesome square wave ringing to clean true sine wave
- Fully compatible with caller ID, call waiting, hookswitch flash, and CPC signaling
- Works with distinctive ringing services, fax machines, and modems
- Duplicates the original ring cadence so custom ringing patterns still work
- Easy plug-and-play installation with two RJ-21X female connectors
- Does not affect normal telephone line operation
- Not compatible with pulse dialing (standard tone dialing works fine)
Comparison to Similar Models Viking makes a full family of ring boosters so you can match the exact size you need:
- Viking RG-224 (this model) → Best for 24 lines
- Viking RG-212 → 12-line version for medium systems
- Viking RG-204 → 4-line version for smaller offices
- Viking RG-4 → Single-line basic booster
- Viking RG-10A → Single-line high-drive model (up to 12 REN)
Technical Specifications
- Power: Two 120V AC to 15V AC 2.2A UL listed adapters (included)
- Ring Output: 90 VAC nominal, 55 VAC at 4 REN load
- Ring Wave Shape: True sine wave
- Incoming Ring Detection: 20–150 VAC
- Connections: Two RJ-21X female connectors
- Dimensions: 19” W x 9.5” D x 1.75” H (483 mm x 241 mm x 44 mm)
- Shipping Weight: 10.5 lbs (4.8 kg)
- Operating Temperature: 32°F to 90°F (0°C to 32°C)
- Humidity: 5% to 95% non-condensing