Finding which network cables do what

ScumLord

I have a switch with about 20 cables coming out of it. I know that one of them goes to a particular room but I don't know which one. Is there any device that I could plug in both ends to find the cable I want or can anyone suggest a way?

seamus

Do you know where it is in the other room? Are you free to plug it in and out?

If so, easiest way is to unplug any cables that aren't connected on the far end (i.e. that have no lights showing). Then get someone else to go into the other room and unplug the cable. You'll know then that which ever port goes out, is the one you were looking for?

Otherwise, you may need to use SNMP to trace the connection, presuming the switch supports it.

gibo_ie

simplest thing is to get one person to unplug the device in the room and another to watch for lights goign out on the switch.
You could get a cable tester and plug it in each end either but a lot of manual testing on it.

MarkR

Easy enough.

1. Wait until everyone is downloading vital stuff from net.
2. Unplug cable
3. Listen for screams

Or get some labels and a person to unplug / plug cables in til you know what ends where. Assuming that they're not already labeled. I suppose if they were you wouldn't be here, but you never know!

ScumLord

The problem is the cables go off into wall mounted plugs there's 7 of them not lit up and the cable I'm looking for isn't connected to anything (but the switch).

The connection I'm looking for goes off to another room and the plan was to put another switch there but now I want it for an internet connection. I'm not even 100% sure the cable goes into that room but I know which plug it's supposed to be.

Alun

In that case just grab a laptop, go to the room with the network outlets in it and plug it into each one, one by one, and get someone (on the other end of a mobile) to watch the switch and tell you which port lights up when you connect the laptop (if any).