Distance to exchange

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NzKaizer

130 posts

Master Geek

#49656 20-Nov-2009 09:35

I called up telecom trying to find out the distance to an exchange from an address. The current address isnt connected to a phone line, so they used a nearby address. Unfortuanatly it came up with inconclusive results, so they said they can run a bigger check that would also give me line stats and tell me what speed I would get and call me back in 1 hour.

That was 2 days ago, suffice to say Telecom CSR living up to their name.

Is there another way for me to get this information ?

All I've being able to do myself is look up the address on telecom's maps page. http://www.telecomwholesale.co.nz/maps

The exchange is Mayoral drive.

All I can see is that the address is not in an area scheduled to get a cabinet, its about 2 roads away.

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#274673 20-Nov-2009 09:51

Its never easy to tell the exact cable route especially in inner city areas like where you are. But its reasonable to assume that if its only 2roads there are not a lot of option. PM me a street address I and I try to comment.

Cyril

NzKaizer

130 posts

Master Geek

#274677 20-Nov-2009 10:05

I meant 2 streets away from area that will get cabinet, not 2 streets from the exchange itself.

I can't find PM button, so used email button instead.

Thanks

cyril7

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#274685 20-Nov-2009 10:28

Hi, it would appear that your address (or near by) will not be cabineted. I did several cable run measurements from each end of that street via several routes, the shortest was 750m the longest going all the way back out to princess and up to Wellesley and down to the Exch was around 1400m. I would expect the shorter run is closer to what would happen, or maybe around the 1km mark.

From experience on a 1km cable expect 15Mb/s or more as a sync rate.

Cyril

NzKaizer

130 posts

Master Geek

#274688 20-Nov-2009 10:46

Sounds good.

Thanks for that information.

Cheers.

DWG

22 posts

Geek
Inactive user

#274689 20-Nov-2009 10:49

From experience on a 1km cable expect 15Mb/s or more as a sync rate.

Very impressive! I used to work for Downer Engineering in Whangarei (2004). I have installed broadband on Rural Farm Properties and all they got was 2-3KB/s of Xtra broadband glory.

I live in Hamilton now, 1 kilometer away from the exchange and I get a 10MB/s. Upload speed is still pathetic of less than 1MB.

cyril7

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#274691 20-Nov-2009 10:51

Hi Darren, looking back over my dairy from the last couple of months I have at least 20 jobs where line attenuations of 15-20dB (so well over 1km) and sync rates all around the 15mb/s mark, so its not an unexpected figure.

Cheers
Cyril

adslgeek

50 posts

Geek

#275043 21-Nov-2009 22:34

Just a clarification, a lot of people are looking to measure the distance from the DSLAM, but the reality that this is not the major factor.

The cable may be different gauges and the types / quality of connections between cables as well as the internal house wiring, as well as extension cables. (from my testing the extension cable drop about 3dB attenuation per 10Metres of extension cable - which can be about 600metres if measured by normal roadside cable).

To me the far more relevant measure is the attenuation of that signal. eg I don't care if the exchange is over the road from me as the crow flies if my cable travels several km before getting to me.

The signal attenuation is what will drop your synch speed.

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cyril7

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#275098 22-Nov-2009 08:25

Hi, yes to concur with adsl geek, line attenuation is the only significant factor in gauging potential line speed, level of interfernece or noise from other DSL connections is the next to concsider. However in general estimating line length will give you some guide as to the lines potential in the absence of being able to perform an attenuation measurement.

Cyril

NzKaizer

130 posts

Master Geek

#275160 22-Nov-2009 13:33

Then how would I go about acuiring the line attenuation stat for the address ?

cyril7

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#275396 23-Nov-2009 10:33

Its not possible without it being measured, telecom may have records of the 300kHz loss, but they would have offered that to you by now if they did.

However based on a sensible evaluation of cable routes from the address to the exhange it is reasonable to estimate that you should get good to excellent DSL performance. As I said in the worst case its 1.4km, at best 0.7km, either of these cable lengths should with reasonable certainty provide DSL performance well in excess of 10Mb/s assuming your apartment wiring is up to it and there are no out of ordinary issues with the cable or joints back to the exchange.

Cheers
Cyril

NzKaizer

130 posts

Master Geek

#275633 23-Nov-2009 21:30

Assuming everything is in good nic as you say above, 10mb+ speeds would be quite an inprovement over my current 3mb sync.

adslgeek

50 posts

Geek

#275892 24-Nov-2009 17:59

Hey all you need to do is acccess the router interface, and you will see the attenuation. You can just chuck it into my ugly troubleshooter here at http://www.adslgeek.com/troubleshooter and then just input the figures.

If you don't know how to get into the modem, just message me and I am happy to help out OK?

Ragnor

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#276001 24-Nov-2009 23:49

You might have missed the part where he said "the current address isnt connected to a phone line" sounds like he's considering moving in and is doing some research on what the net performance would be before he moves.

True geek!

cyril7

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#276020 25-Nov-2009 06:07

:)

Cyril

adslgeek

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#276355 25-Nov-2009 22:59

ah in that case, telecomwholesale.co.nz/maps or use prequal tool from your isp.

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