How to identify the origin of an RJ45 in a patch panel
Drwoff
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Drwoff Posted messages 6 Status Membre -
Drwoff Posted messages 6 Status Membre -
Hello everyone,
This is my very first time posting on a forum, but I'm really struggling to handle this on my own!
My problem:
I live in an apartment within a hotel. Until now, I've been using the hotel's network for internet access, but with a very limited speed.
As a result, I had a new phone line created by France Telecom while signing up for an ADSL subscription with SFR.
The technician managed to create this new line and installed a DTI test box next to the existing patch panel, albeit with some difficulty.
So far, so good, except that the only Ethernet socket I have at home hasn't been connected to the DTI box that the technician installed, which according to him, must be connected by myself! ????
However, the patch panel consolidates I don't know how many outputs for RJ45 sockets, and I have no desire to mess up the hotel's network!
Furthermore, I absolutely cannot run a new cable through three floors and various turns or stairwells.
So, my question is: how can I identify the outgoing cable for an Ethernet socket in a patch panel, or what professional can identify this outgoing cable for me?????????????
Thank you in advance
This is my very first time posting on a forum, but I'm really struggling to handle this on my own!
My problem:
I live in an apartment within a hotel. Until now, I've been using the hotel's network for internet access, but with a very limited speed.
As a result, I had a new phone line created by France Telecom while signing up for an ADSL subscription with SFR.
The technician managed to create this new line and installed a DTI test box next to the existing patch panel, albeit with some difficulty.
So far, so good, except that the only Ethernet socket I have at home hasn't been connected to the DTI box that the technician installed, which according to him, must be connected by myself! ????
However, the patch panel consolidates I don't know how many outputs for RJ45 sockets, and I have no desire to mess up the hotel's network!
Furthermore, I absolutely cannot run a new cable through three floors and various turns or stairwells.
So, my question is: how can I identify the outgoing cable for an Ethernet socket in a patch panel, or what professional can identify this outgoing cable for me?????????????
Thank you in advance
3 réponses
Hi,
it's a real shame that the outlets aren't labeled in a hotel, it's not easy for people who need to troubleshoot.
Ideally, you would need a cable tracer, but a simple multimeter in ohmmeter mode might be sufficient, if you know how to use it.
The idea then is to take an RJ45 cord, cut it in half, and short-circuit the blue pair in the middle with the white/blue wire and blue wire on one end.
No need to insulate, there's no risk.
You put this short circuit on the wall socket you want to identify.
At the patch panel, take the other end of the cable and measure the resistance between the blue and white/blue wires on all the free sockets; the one where you have the short circuit should be yours.
--
And ... Voila Voilou Voila!
it's a real shame that the outlets aren't labeled in a hotel, it's not easy for people who need to troubleshoot.
Ideally, you would need a cable tracer, but a simple multimeter in ohmmeter mode might be sufficient, if you know how to use it.
The idea then is to take an RJ45 cord, cut it in half, and short-circuit the blue pair in the middle with the white/blue wire and blue wire on one end.
No need to insulate, there's no risk.
You put this short circuit on the wall socket you want to identify.
At the patch panel, take the other end of the cable and measure the resistance between the blue and white/blue wires on all the free sockets; the one where you have the short circuit should be yours.
--
And ... Voila Voilou Voila!
quentin2121
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Billmaxime, this is for you, how would you do in this specific case? By the way, hello :)
--
“Take your chance, grab your happiness, and go towards your risk. As they watch you, they will get used to it.” René Char
--
“Take your chance, grab your happiness, and go towards your risk. As they watch you, they will get used to it.” René Char
In fact, to clarify my concern, my Ethernet socket is indeed connected to a patch panel (near the DTI) which is itself connected to one of the switches in the hotel! This is explained by the fact that an extension was created later on in the first building, where the network infrastructure starts with 6 switches, each with 24 ports!
??
Actually, no, that doesn't clarify anything.
If your socket is connected to a switch at the patch panel, it would be simpler if you had access to the administration of the switch: it is then easy to identify a socket if you have access to the patch panel layout, but it’s fairly easy to visually follow a patch cord a meter or two.
Once you know the port via the MAC/port table of any manageable switch.
The fact that the patch panel is located in another building does not change anything in this matter.
To perform the test indicated above with a multimeter, even with a tracer, you need a free socket disconnected from a switch.
Once again, I am very very very surprised that an installation with nearly 150 switched Ethernet ports does not have its sockets labeled at the patch panel; it’s unmanageable.
I advise you to get in touch with the network administrator if you find yourself in this situation.
--
And ... There you go!
??
Actually, no, that doesn't clarify anything.
If your socket is connected to a switch at the patch panel, it would be simpler if you had access to the administration of the switch: it is then easy to identify a socket if you have access to the patch panel layout, but it’s fairly easy to visually follow a patch cord a meter or two.
Once you know the port via the MAC/port table of any manageable switch.
The fact that the patch panel is located in another building does not change anything in this matter.
To perform the test indicated above with a multimeter, even with a tracer, you need a free socket disconnected from a switch.
Once again, I am very very very surprised that an installation with nearly 150 switched Ethernet ports does not have its sockets labeled at the patch panel; it’s unmanageable.
I advise you to get in touch with the network administrator if you find yourself in this situation.
--
And ... There you go!
Yes,
it's much better for him to be free.
As I told you, if he is connected to the switch, a network administrator can easily tell you which port, it's very easy.
At worst, you just need to connect a PC to the end and look at the indicators on the switch to see which one lights up, then follow the patch cable.
it's much better for him to be free.
As I told you, if he is connected to the switch, a network administrator can easily tell you which port, it's very easy.
At worst, you just need to connect a PC to the end and look at the indicators on the switch to see which one lights up, then follow the patch cable.
SFR is coming to address an internet box issue, insufficient bandwidth, etc. They will test your equipment and wiring, so in our friend's case, since he is an SFR customer, they should come to do his connection! Call 1023; it will be better than going to a store!
Or ask them which port on the switch your RJ45 cable is connected to, as Brupala told you!
Or ask them which port on the switch your RJ45 cable is connected to, as Brupala told you!
I understand that the current wall outlet is already connected to the hotel's network.
The only solution, to avoid creating a mess, seems to be the tracker.
There are some cheap ones, but I don't know what they are worth.
In the middle of the page, several models
Otherwise, the explanation seems fairly clear.
But assuming I opt for this solution, how can I assess the short circuit with a cable tracer or a multimeter?