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142 posts

Master Geek
+1 received by user: 16


Topic # 83380 15-May-2011 17:01
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I live in an apartment and there are cables running from under the stairs to 5 rooms for telephones. The cable is labeled cat 5e - there are 9 cables coming into the junction box that is shown in the picture.

I want to look to using the cables to connect my router to a computer - the router is downstairs near this junction under the stairs and the computer is upstairs near a telephone point. The telephone points have RJ11 connectors.

I was also looking to have a single filter instead of filters at each phone point. 

Questions - What am I looking at in this junction box? Does there need to be two cables from this box to the telephone point upstairs if I am going to have both the telephone and the computer connected there or can this be done with just the one existing cat 5e cable?

Any help appreciated. 

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106 posts

Master Geek
+1 received by user: 7

  Reply # 469355 15-May-2011 17:31
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This junction box has all of the wires hooked up ready for ethernet. They have connected the telephone only, using the blue and blue/white wires.
To network to your different rooms you need to terminate Cat5 wire onto each wire set (except blue & blue/white) and either crimp RJ45 plugs on or fit a RJ45 patch board to use patch cables to your router.
At the room end you can change the wall plates to RJ45 and fit ethernet/phone splitters like these-

To fit a filter just add it onto the incoming blue & blue/white wires and fit a RJ11 wall plate for the router to plug into. The filters have the wiring instructions with them and are very simple to fit, just get the proper telecom crimps to avoid any connection problems.

142 posts

Master Geek
+1 received by user: 16


  Reply # 469376 15-May-2011 18:05
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Thanks that's very helpful.

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