Cat 5 cabling not supporting broadband speeds

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Here is my problem. I am living in a 3 story house in Amsterdam. Download speed from my UPC my broaband provider is 60Mbps down/5Mbps up. I have tested this via a direct link from cable modem to my laptop. That works.

However, the cable modem is on the ground floor in the meter cupboard. somehow this house has been wired where cabling has been brought from the meter cupboard to the top floor.

The cabling appears to be set up as: short cat5 cable from cable modem to what looks like some sort of small phone switch with a number of bare wires connected. then from this same small box are a number of other wires connected which form the bottom of the extended cable that goes to the top. the cable then extends from the wall on top floor and there is an RJ45 at the end.

When I plug the RJ45 into the laptop I get a max of 10Mbps download speed and when i plug this cable into the desktop i'm luckly to get 1Mbps down.

I have tried using the router but get the same speeds. I have checked network cards etc and everything is fine.

Why am I losing all of this speed? I don't think I am more than 30m from top to bottom so it's not a cable length issue. Ichecked and the cable is CAT5.

The only thing that makes sense is the way that two cable have been used, with wires stripped at both ends and then being connected through some form of junction box. perhaps this is causing the loss of speed.

I don't know why someone didn't drop the cat5 cable all the way down with RJ45's at both ends.

I can't put a wireless router in the meter cupboard since i have 4-5 other devices that need to be connected to the router on the top floor.

I've come up with a temporary solution to improve the speed by connecting the modem to a powerline adapter but I only get 50% of the speed.

I don't see why i shouldn't be getting the maximum speed so any suggestions or thoughts would be welcome.

otherwise i suspect i might need to get a wiring specialist out to check or rewire.

thanks
kerry
 
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