Description
If your analog phones or fax machines aren't ringing reliably because your FXS ports or PABX stations are putting out weak or distorted ring signals, the Viking RG-204 is the straightforward fix you need.
The RG-204 takes problematic ringing signals — whether they're too weak to trigger a ring or distorted square waves that confuse equipment — and reshapes them into a clean true sine wave output at a full 4 REN of ring power. It works across four ports simultaneously via easy RJ-21X installation, making it a practical solution for small phone rooms or equipment racks where multiple lines need correcting at once. Because it's fully Caller ID compatible and supports distinctive ringing services, you won't lose any of the features your phones and fax machines depend on.
This unit is well suited for VoIP gateways, hosted phone systems, and legacy PABX/KSU environments where analog port ring power frequently falls short of what connected devices actually need.
Our Expert Take: The RG-204 is one of those quiet problem-solvers that earns its place in an equipment rack fast. If you've been chasing intermittent ringing complaints on analog stations connected to an IP phone system or hosted PBX, weak FXS output is almost always the culprit — and this unit addresses it cleanly without touching normal line operation. Keep in mind it is not compatible with pulse dialing, so confirm your environment uses tone dialing before deploying.
Key Features
- Boosts weak or failing ring signals on FXS ports, IP phone system analog ports, and analog PABX/KSU stations
- Reshapes distorted and troublesome square wave ringing into a true sine wave output
- Boosts ring power to 4 REN for reliable ring detection on connected devices
- Caller ID compatible – preserves Caller ID pass-through on all ports
- Compatible with distinctive ringing services
- Fax and modem compatible
- Easy RJ-21X installation for quick deployment
- Will not affect normal line operation
- 4-port design handles multiple analog lines simultaneously
Technical Specifications
- Ports: 4 analog phone line ports
- Connector: RJ-21X
- Ring Output: True sine wave, 4 REN
- Caller ID: Compatible
- Distinctive Ringing: Compatible
- Dialing Compatibility: Tone dialing only (not compatible with pulse dialing)