After I left there was an upgrade to VoIP phones. I didn't have access to the switches, but there were four 100bT switches combined to gigabit fiber. I brought some of the 4 conductor CAT5 cable home, I managed the pool of IP addresses our department was given and could ask to have the nameserver record changed. He went on to say that the switches he uses has qualification tests built in.īefore I became more involved, and it was early Ethernet, like for windows 3.1 machines, we got network cards with silver satin cable so no one knew what they were doing. TDR is the next step and the final step is bandwidth.
Diy lighted ethernet status tester install#
He said that usually if he has to install a cable as long as it passes the quick test, it's usually OK. I have friends in the business and they usually get a wiring contractor to do the initial work and qualify the installation. It's not the best explanation, but the schematics show all that is needed to make it work. The tester will be really useful for the usual faults of a wire or two not making connection, a couple of connections swapped, or the far end being from a completely different cable. However, wiring an ethernet cable wrong like that is going to need to be done deliberately. That won't be detected by the tester as the lights will still illuminate in the correct order. Also if the cable is wired wrong, with each pin wired to the one above, like this:. The tester relies on there being at least one other wire working to give a return path. On the receiving end any wire that is low is connected via a diode to the common wire in the receiver, to provide an earth path.Ī major function of the tester is simply to have the LEDs with numbers against them so that it's easy for the user to work out what is happening.
When one wire is high, all the other are low. That is triggered from the 555 to give a second or so on each output. The 8 wires are connected to 8 outputs of the CD4017. Click to expand.It's not the best explanation, but the schematics show all that is needed to make it work.
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