NewUser1
| Optimum phone cable length
Hi there,
I am getting my teksavvy DSL installed tomorrow. The only phone cable I have, to connect between phone jack & modem, is about 6ft long. Will this cause any problems with my speeds? |
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TSI Gabe
Premium,VIP
join:2007-01-03
Chatham, ON | The shorter the better, but 6ft long shouldn't be a problem at all. |
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Moonlight
@videotron.ca
| reply to NewUser1
Keep in mind that the wiring within your house/apartment to Bell's line entry-point/demark may be over 100' long and from there to the remote/CO may be well over 1000' more. An extra 6' will usually make very little difference.
You should be more concerned about your in-house wiring quality (often a mess) and Bell's line quality than the final 6' stretch. The ideal setup is to split and filter your line after the demark (if you can) so your modem will not be seeing any of the junk that may be present on the rest of your phone wiring. |
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Inssomniak
Premium
join:2005-04-06
Cayuga, ON
| The problem with that last final connection to the modem from the wall is not the length, but its always with flat telephone cords, and this "flat" NON twisted cord that is 6 feet long is the only section from you to the Central Office or remote that is not twisted pair, so, we all know what that means, it is prone to interference, and as a former telephone guy, I fixed many a DSL lines that wouldnt hold sync by replacing that 25 foot cord a customer twist tied all up behind the desk, with a 6 foot one or running a new jack closer to the modem. |
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Bicephale
join:2005-09-24
 ·TekSavvy Solutions..
| reply to NewUser1
Hi,
Allow me to answer this with pictures:
Hopeless (because of the PVC sections)
Bad enough (but curable)
%20&%20Home%20Lines%20.JPG) %20&%20Home%20Lines%20.JPG)
Better (but somewhat involved)
Basic (use centralized filtering whenever possible!)
%20.PNG)
The customer's own wiring
 |
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qpp401
join:2003-11-01 | talking about those 6ft cords, does anyone know what these various codes are? I've seen e166160, e157914, e133136. The last one ships with the ST516 modem. |
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Moonlight
@videotron.ca
| reply to Inssomniak
said by Inssomniak  :The problem with that last final connection to the modem from the wall is not the length, but its always with flat telephone cords, and this "flat" NON twisted cord that is 6 feet long is the only section from you to the Central Office or remote that is not twisted pair Old houses (at least those I have visited and had an opportunity to check phone wiring) are wired with non-twisted (well, not pair-wise) four conductors cables. A friend of mine had ADSL in an apartment with such wiring and back then, getting 800kbps out of her 1.5Mbps profile was only possible on lucky days.
Having unnecessarily long cables is obviously never going to do any good but for the final 6', pretty much any cable will do. From the phone installations I have seen for as long as I remember, I would be most concerned with the building's wiring. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| Hi,
Relatively to "flat" cables, even after i shielded
two severly exposed sections of it this simply did
not compensate for whatever still remains outside,
i wouldn't put so much emphasis on a 6' cord which
is like the three hiding a forest when one has his
nose too close to it... I yet have to see numbers
proving that the benefit of using Twisted pairs is
measurable even on such short distances, actually. |
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Candoo3
join:2005-01-24
·TekSavvy Solutions..
| reply to Bicephale
Who's mast is that? :O It looks like it's part pvc and part metal.  |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| Euh...
Mine and i hate it! Even if i could get Bell here
to install an NID with a splitter/filter and a 2nd
cable made of a CAT-3 twisted pair i'm afraid that
it would have to be located on the roof - Which is
most unlikely because it has to remain accessible!
 |
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Candoo3
join:2005-01-24
·TekSavvy Solutions..
| said by Bicephale :Euh... Mine and i hate it! Even if i could get Bell here to install an NID with a splitter/filter and a 2nd cable made of a CAT-3 twisted pair i'm afraid that it would have to be located on the roof - Which is most unlikely because it has to remain accessible! Ummmm ... I was actually looking at the construction of the mast itself, and what's connected to it besides hydro. No offence intended, but being an electrician, how does that rig pass code so that they don't tag you out ? Supposed to be PVC or metal, but not a combo. I'm surprised other services would even connect to it. That's a BIG NO NO too !  |
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Bicephale
join:2005-09-24 | No offense taken, that's not my department but i'll pass the word.
 |
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me13
@bell.ca | reply to Candoo3
AFIAK, there is no problem using the mast to hang the cable and telco drops. I have done it many times, and it was the correct way according to eng. at Bell. |
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RogersLite
join:2004-12-05
Canada | reply to NewUser1
well i have like a 30 foot cable from my modem to the phone jack, but i have no problems so you shouldn't either. |
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Candoo3
join:2005-01-24
·TekSavvy Solutions..
| reply to me13
said by me13 :
AFIAK, there is no problem using the mast to hang the cable and telco drops. I have done it many times, and it was the correct way according to eng. at Bell.
It may be on a regional basis? I know that it used to be common practice as it is simpler for phone and CATV installs, but has changed for some time, from what has been related to me. Not that it matters from my end. Once the service is connected, my end is done.  |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| reply to NewUser1
%20.PNG "33451 bytes")
Close to Demarcation Box, Centralized Filtering, Shielded | %20.PNG "33374 bytes")
Away from Demarcation Box, Centralized Filtering, Shielded |
Still relatively to flat cabling lengths, i've got
a strange case here: what you have above is about
the spectral response of my SpeedTouch when it was
optimally installed and then after i moved it to a
room which is connected through one 50' flat cord,
a pair of protection bars + one 6' flat cable each
and then another 6' cord, i'm unsure... I believe
centralized filtering made it possible, it allowed
me to move the MoDem back to that room again! So,
my advice to NewUser1 is to make the rest "clean"!
But these are snapshots from 'OrbMT'. This time i
have noticed the FirmWare also plays a role so the
conclusion may be that a twisted pair won't always
fix everything. Maybe it's 95 % voodoo indeed!...
2007-Jul-24: Close to Demarcation Box, Centralized Filtering, Not Shielded
%20-%20OrbMT%20.PNG)
2007-Sep-28: Close to Demarcation Box, Centralized Filtering, Shielded
2007-Oct-16: Far away from Demarcation Box, Neat Centralized Filtering, Shielded
 |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| reply to me13
Hi Me13,
Bell should update its standards. Place shielding sleeves such as these over noise-challenged flat cabling...
(Grounded Ferro-Magnetic Metal Sleeves)
...and then something like this should result:
%20.GIF)
(Hourly Man-Made Noise Curves)
...which shows that sticking flat phone cables to PVC Power conduits is no good idea to begin with.
 |
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hockeynomad
join:2007-06-19
Mississauga, ON | reply to NewUser1
I changed the standard 6' cord to 6" from jack to modem and the result was .5mb increase in download speeds. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
1 edit | Hi HockeyNomad,
A 6" cord will sure help in a noisy environment so
maybe you've got a noise source nearby... Look at
this nice graphic which illustrates that there's a
significant relationship between "error rates" and
the related transfer speeds, the fewer the better:
Speed slower than expected (Elite), d_l, 2007-Sep-16
I'm surprized your 6" cord makes such a difference
but the behaviour of DSL signals isn't always easy
to predict, as i demonstrated just a few days ago!
P.S.:
My PVC section is harly 6' but it does hurt a bit. |
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