C4FM-JET is a C4FM Fusion gateway reflector and a single access point for exploring YSF reflectors, FCS rooms, and YCS groups — all under one roof. Starting at YSF 95110, it is not a standard YSF reflector. It is a gateway hub, using DN mode DG-ID access to provide 99 predetermined C4FM destinations across YSF, FCS, and YCS networks.
C4FM-JET is the Fusion sibling of XLXJET, built on the same philosophy: one connection, 99 destinations, switch channels from your radio. The experience is more like channel switching between pre-programmed memory channels using just your radio with no computer interface required. Users switch DG-ID on their radio to move between destinations.
One connection. 99 rooms. Just turn the dial.
C4FM-JET connects to three types of Fusion reflector systems:
YSF — Open-source, decentralized Fusion reflectors hosted by individual operators. Each YSF reflector is a single-room server. They are not connected to Wires-X and are accessed via hotspots or software like BlueDV.
FCS — Centralized Fusion reflector servers, each hosting up to 100 rooms. Originally created by the German DV4mini team. FCS rooms are accessed via hotspots using the FCS protocol.
YCS — The newest and most capable Fusion reflector system, developed by Kurt OE1KBC. YCS supports YSF, FCS, and IMRS protocols, allowing DR-2X repeaters to connect directly. YCS servers offer up to 100 DG-ID groups and can interlink with other YCS servers worldwide.
All three serve the same basic purpose — they connect Fusion users together over the internet. C4FM-JET handles all three so the user doesn't need to think about which system they're connecting to.
If you already operate on Yaesu System Fusion, you already know how to connect to a YSF reflector. C4FM-JET is just another YSF reflector to connect to. Once you're linked, every destination C4FM-JET reaches is one DG-ID change away.
DG-ID 00 is the default "all call" channel in the Fusion protocol. Any radio set to DG-ID 00 hears all traffic regardless of DG-ID, and transmissions on DG-ID 00 are heard by everyone.
Users who set a specific DG-ID (01–99) are isolated in their own room and do not hear DG-ID 00 traffic.
| DG-ID | Destination | C4FM Connection |
|---|---|---|
| 00 | Default / All-Call | Heard by all DG-IDs |
| 01 | 235 ALIVE | XLX248 DGID 15 |
| 02 | ALABAMA LINK | YSF 02034 |
| 03 | AMERICA LINK | YSF 32592 |
| 04 | AMERICAN RAG CHEW | YSF 64230 |
| 05 | ANZEL | YSF 50556 |
| 06 | BAY AREA DIGITAL CA | YSF 31069 |
| 07 | BOREDOM BREAKERS | YSF 49869 |
| 08 | BLIND HAMS | YSF 76138 |
| 09 | CARIBBEAN | YSF 02491 |
| 10 | CDARIN | YSF 35739 |
| 11 | CNJHAM | YSF 44977 |
| 12 | COLORADO DIGITAL | — |
| 13 | CQ-NORTH UK | YSF 23450 |
| 14 | CQ-UK-WW | YSF 27793 |
| 15 | CUMBRIA | YSF 89134 |
| 16 | DX LINK SYSTEM | YSF 11102 |
| 17 | EAST COAST REFLECTOR | YSF 44444 |
| 18 | EXTENDED FREEDOM | YSF 23525 |
| 19 | FIRESIDE | YSF 32888 |
| 20 | FREESTAR INTERNATIONAL | YSF 27815 |
| 21 | FREESTAR UK | YSF 23425 |
| 22 | HRCC | YSF 01037 |
| 23 | HUBNET UK | YSF 96255 |
| 24 | ILLINOIS LINK | YSF 83132 |
| 25 | INDIANA LINK | YSF 43844 |
| 26 | IRN | YSF 31320 |
| 27 | KANSAS CITY WIDE | YSF 32453 |
| 28 | M17-M17C | YSF 009517 |
| 29 | NEBRASKA HUB | YSF 72340 |
| 30 | NETOHOLICS | — |
| 31 | OHIO LINK | YSF 40557 |
| 32 | OKLAHOMA LINK | YSF 19053 |
| 33 | PIEDMONT TRIAD | YSF 31379 |
| 34 | PI-STAR CHAT | YSF 31672 |
| 35 | QUADNET | YSF 31001 |
| 36 | RHODE ISLAND LINK | YSF 31444 |
| 37 | SCANNER JUNKIES | — |
| 38 | SOCAL DIGITAL | — |
| 39 | SOUTHEAST LINK | YSF 43389 |
| 40 | SPECIAL-K 420 | XLX303 DGID 20 |
| 41 | SWLA LINK | YSF 54634 |
| 42 | TEXAS DFW | YSF 08180 |
| 43 | TGIF MOTHERSHIP | — |
| 44 | UK 116 | — |
| 45 | UK CHATBOX | YSF 23503 |
| 46 | US RAG CHEW | YSF 06487 |
| 47 | VENTURE OVERLAND | XLX303 DGID 17 |
| 48 | W3KIT | YSF 28688 |
| 49 | WE0FUN | YSF 53927 |
| 50 | WHITE LIGHTNING | — |
| 51 | WHO CARES | YSF 70777 |
| 52 | WORLDWIDE CHAT MM | YSF 13908 |
| 53 | WORLDWIDE PRIDE | YSF 85527 |
| 54 | WPSD PROJECT | YSF 00493 |
| 55 | ZOMBIE NETWORK | YSF 88240 |
| 56–98 | Reserved | Future use |
| 99 | Parrot | Echo test |
DG-ID 99 is the built-in echo test, also known as a parrot. When you transmit on DG-ID 99, the reflector records your transmission and immediately plays it back to you. This lets you check your audio quality and confirm that your connection to C4FM-JET is working without needing another operator on the other end.
DG-IDs marked with — do not currently have a C4FM connection but are reserved for future use as those networks add YSF support.
C4FM-JET is built entirely from open-source, GPL-licensed components.