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321 posts

Ultimate Geek

Topic # 30940 26-Feb-2009 12:44
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Telecom PTC106 (found here) states:
(2) The home distributor cabinet in all new installations shall be mounted
immediately behind and above the ETP on the inside of the wall.

Most other people talk about a centrally located distribution cabinet.  A centrally located cabinet will minimise (average out) cable lengths. 

I plan to put my cabinet in the centre of the house, which is about 10m from the ETP (measured with straight line in plan view) so probably more line 14-15m cable length. 

Is this an issue?

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  Reply # 198339 27-Feb-2009 09:21
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Hi Jimmy, I have had some interesting conversations with the folk at Telepermit on this one and there seems to be a bit of foot shuffling when you mention it as putting it on an outside wall contridicts there previous advise to put as little phone/data stuff on outside walls to prevent moisture ingress.

The bottom line is put it where you like they dont care, however it is recommended that you make allowance for easy FTTH installation when and if that should happen. So your best line action should be, 2x runs of cat5 to the demarc from your hub, this will allow one for ethernet from the ONT and one for 1-4voice circuits. Its still unclear if the ONTs they will supply will offer voice or if you use VOIP from your router in the hub, but regardless run 2x cat5e. You might like to run a RG6 also, not that its mentioned anywhere, but its not unreasonable to suggest that a provider may oneday offer TV services (not via IP but in RF baseband on Fibre) so its would be good to be able to pick this up.

I also recommend that the demarc which is normally near the power meter board and often on the side of the garage in most homes, has a power point on the inside wall behind but near the demarc, I also recommend that you place a flush box with a blank faceplate on the inside wall directly behind the demarc so you can both easily get to the cat5s going to the demarc and so you could easily pull a fibre through from the demarc to the inside wall behind the demarc where you could locate a ONT on the wall, the power point to power it (and its UPS) the 2x cat5 can be connected to it, so make sure there is a good 3-500mm of spare cat5 in the wall to pull through.

Telecom dont want to run long runs of fibre through your home, hence they want it a close to the demarc as possible, failing that as long as you have somewhere near the demarc to house and power the ONT and a couple of cat5 runs to feed it onward to your home your good to go.

Personally I never put it on an outside wall near the demarc for the same reason as you except in smaller homes, so dont worry, but I do recommend you make the future option of FTTH a little easier.

Hope this helps


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