Use all RJ45 sockets with a single SFR box

Question

Hello everyone,  I just moved into an apartment (new, one year old) and to my great surprise, I just saw that it is equipped with RJ45 (Ethernet) sockets in every room.  I thought that by connecting my SFR box to one of them, it would spread the internet connection to all the others. However, when I connect an Ethernet cable to another wall socket, it doesn't work. I have an Xbox that doesn't have Wi-Fi in one of the rooms and I don't want to run a 30-meter Ethernet cable through the apartment ^^  I've read all sorts of things online to try to use this type of socket, but it seems too complicated. Could you please let me know how to make it work?  I've seen that I might need to set the box to "router" mode, or to connect the box to a specific socket in the apartment to deploy the network in a star configuration.  Thank you very much in advance for your replies :)  Have a great day

brupala · Accepted Answer

Hello, indeed you need to place your box near the communication cabinet and connect the Ethernet ports to the sockets on the patch panel (where the labels with the names of the rooms are). Nothing should be on the test socket of the DTI and connect the ADSL from the box to the modem output of the filter with an RJ11 cable. PS, on the RJ45 (8P8C) sockets, just because there are 8 contacts, doesn’t mean there are 8 wires connected behind. If it's done correctly, you have 4 pairs, if done incorrectly, you may only have one.  and ... Voili Voilou Voila !

jee pee · Answer

Hello,  Your box must be plugged into one of these sockets if it's ADSL, right?  Then in your apartment, there should be a central box from which all the Ethernet sockets are coming out?  Best regards  --  A stranger is a friend we haven't met yet.

jee pee · Answer

The connection isn’t great already ;-)   The DTI is a test box to which nothing should be connected.   Theoretically, there should be a cable running from the back of the DTI to the box on the left "xdslfilter". It should be the grey cable that’s plugged into line at the bottom.   And phone1 (or modem) should go to the "living room" socket for connecting the box in ADSL.   Additionally, we need to check if the sockets at the bottom of the 4 outputs to the rooms are RJ11 (telephony) or RJ45 (computer network).   Because to the naked eye, but I could be wrong, the 4 cables starting from these connections seem too thin to have the 8 wires of an Ethernet connection; the cables look like they are only meant for telephony.    A stranger is a friend we haven't met yet.

jee pee · Answer

Indeed, the RJ11 is a smaller connector for telephony than the RJ45.   We should check if an RJ45 socket fits into the connectors of the central unit.   However, this does not indicate whether the cable actually has 8 wires and if they are connected.   We should look at an RJ45 socket in the rooms to see if the 8 wires are connected.    A stranger is a friend we haven't met yet.

jee pee · Answer

We misunderstood each other.  Your living room connection allows ADSL to reach your box. You cannot touch it.  If you want to redistribute Ethernet via the central box, you need to plug another Ethernet cable into the box, towards a DIFFERENT wall socket, for example the kitchen.  Then in the central box, redirect the Ethernet connection coming from the kitchen to another room, for example bedroom 1, by making a bridge with an Ethernet cable between the kitchen socket and bedroom 1.  Then in bedroom 1, connect a PC to the wall socket.  In fact, the logic of the central box is to place the box there. This way you have the ADSL arrival and you can redirect Ethernet outputs from the box to each room.   A stranger is a friend we haven't met yet.

Use all RJ45 sockets with a single SFR box

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