Glossary
Terms used throughout JudoNet and its documentation.
Access token
The credential that turns read-only access into full access. Copied from JudoNet Monitor and pasted into the web page. Valid for five days. See access tokens.
Alert
Something JudoNet has noticed and wants you to know about — a clock drifting, a device disappearing, an API failing. Red means still happening, green means resolved. See Alerts and Errors.
Broadcast and multicast
Two ways of sending a message to a network without knowing who is listening. A broadcast goes to every machine on the local network; a multicast goes only to the machines that have joined a particular group, which is how the FairReplay Recorders announce themselves. Everything at a venue finds everything else this way, so a network that blocks either — as many managed switches and almost all guest Wi-Fi do — leaves devices invisible to JudoNet even though they are switched on. See UDP.
CG - JudoGraphics
The system that puts scores and names on the broadcast picture. Receives live data from JudoNet by UDP broadcast, by default on port 5000.
JudoNet's own switches shorten this to just Graphics — Broadcast UDP to Graphics, and the Graphics channel on Queue Status — so both names refer to the same program. The port is not exclusively its own, though: see Contest Order Display.
Contest code
The identifier of one specific fight, for example cont_cup_jun_mac2026_0007_m_p100_0009. It is how every system in the chain refers to the same contest. Click one in the Packets Explorer to copy it in full.
Contest Order Display
The application that shows the running order — which contest is on which mat, and what is coming next. It receives live data from JudoNet by UDP broadcast on the same port as CG - JudoGraphics, by default 5000.
Because they share a port, the two are switched on and off together and cannot be configured apart. JudoNet's Settings page names both — Graphics and Contest Order Display Broadcast — but the master switch and the Queue Status channel still say only Graphics.
Display mode
The screen the scoreboard is currently showing, identified by a number: 3 White, 4 Blue, 5 Both Competitors, 6 Contest, 7 Winner, 13 No-Winner, among others. JudoNet records the moment each one appeared. See what the scoreboard tells JudoNet.
External ID
The identifier of the whole competition, as opposed to a single contest. JudoNet announces it on the network so the Video CutterV2 knows which competition is running.
FairReplay Recorder
The program that records the mats continuously. JudoNet sends it markers and live data so recordings are tagged with what happened. Also called FR Recorder.
JudoBase (JB)
One of the two back-end systems JudoManager desktop can use — the IJF one. Contrast JudoManager (JM). JudoNet configures itself to match the selected server.
JudoManager (JM)
Both the desktop application that runs the competition, and the name of one of the two back-end systems. Contrast JudoBase (JB).
JudoNet Monitor
The small desktop application that starts and stops the JudoNet service. What the desktop icon opens. It is not JudoNet itself. See JudoNet Monitor.
JudoNet service
The background Windows program that does the actual work, registered as JudoNet.Service. It has no window; you control it through JudoNet Monitor and the web page. It does not start with Windows.
Manual contest packet
A packet for a contest the scoreboard operator set up by hand rather than receiving it from the JudoManager desktop — typing the judoka names and the rest themselves. Such a contest has no link to the draw, so JudoNet ignores these packets by default.
Marker
A single tagged moment sent to the FairReplay Recorders — a hajime, a winner, an ippon. Contrast an event, which covers a span of time. Configured in FairReplay Broadcast.
Master switches
The five switches at the top of every page deciding what JudoNet does with the packets it receives: Store Locally, Store Online, Display Online, Broadcast UDP to Graphics, Broadcast UDP to FR. See the master switches.
Packet
One snapshot of what a scoreboard is showing at a moment in time — the contest, the display mode, the clock, the scores, the names. The basic unit of everything JudoNet does. A single contest produces hundreds.
Read-only access
What you get when you open the JudoNet page without a token. You can see everything and change nothing. The safe default for anyone watching rather than operating.
Scoreboard
Both the big screen at the mat and the PC driving it. JudoNet connects to that PC and listens to everything it reports.
Trusted time
Time obtained from an external time server rather than from the PC's own clock. JudoNet establishes it at startup and re-checks every minute; if it cannot, it says so, because timestamps taken from an unverified clock may be wrong.
UDP
The quick way of sending a message over a network: the sender does not wait for a reply and is never told whether it arrived. That suits live scoreboard data, because the next packet is a fraction of a second behind — a lost one is better ignored than delivered late. JudoNet uses it for the announcements devices find each other with, and for its broadcasts to CG - JudoGraphics and the FairReplay Recorders. Contrast the WebSocket that carries packets from a scoreboard, which is a proper connection.
Video CutterV2
The program that cuts the long recordings into one clip per contest. It asks JudoNet for contest timings and can do nothing without them. See its own documentation.
Video Ingester
The program that uploads the finished clips to the platform. It has no direct relationship with JudoNet. See its own documentation.
WebSocket
A connection that stays open in both directions, so a scoreboard can keep sending as things happen instead of waiting to be asked. This is the connection that carries the packets: announcements are how JudoNet finds a scoreboard, and the WebSocket is how it listens to one. The port is the one that scoreboard announces, or 855 if it announces none — see Scoreboard WebSocket Port.
Windows service
A program Windows runs in the background with no window of its own. You do not open or close it like an application; something else starts and stops it — for JudoNet, that is JudoNet Monitor. See JudoNet service.