Does location of cabinet effect speed?

Openreach are finally enabling my local cabinet but much to my surprise it seems as though they are going to place the fibre cabinet across the road. Having just run the fibre, they now dug a trench across the road and marked out where the cabinet will go.

Does this effect speed? Most of the other fibre cabinets I've seen are within a few feet of the old one ...

yes, every metre counts with VDSL2.

They is usually a good reason if the two cabinets are more than 5 to 10m apart.

In reply to a post by MrSaffron:

yes, every metre counts with VDSL2.

True, but if it doesn't take the total distance to the cab over 100-200m it isn't likely to make any difference in practice.

There will be a sensible reason why the DSLAM cab is over the road, most likely ease of access to a power supply. The trench across the road will be for the copper tails between the cab and the DSLAM. This is usually no more than 50m from the cab, and a distance of over 80m would be seriously frowned upon.

The sensible reason is that the fence appears to have grown 'round' the current cabinet as you can see here: http://maps.google.com/maps?q=tn61az&hl=en&ll=51.054...

Across the road is only 5 or so meters.

In reply to a post by Zarjaz:

There will be a sensible reason why the DSLAM cab is over the road, most likely ease of access to a power supply. The trench across the road will be for the copper tails between the cab and the DSLAM. This is usually no more than 50m from the cab, and a distance of over 80m would be seriously frowned upon.

My PCP is on the left (number 5) and has been re-shelled since this picture. The DSLAM cabinet is situated on the right of the picture between the two trees, just where the yellow lines stop.

http://goo.gl/maps/bV40E

Is there an actual acceptable distance from PCP > DSLAM ?

pretty sure my newly installed DLSAM is around 34meters from PCP, it has been istalled around the corner in a completely different street lol

At 34 meters from PCP to DSLAM what would be the actual affect on speed?

Edited by deleted (Sat 08-Sep-12 22:13:34)

In reply to a post by VictorMeldrew:

Is there an actual acceptable distance from PCP > DSLAM ?

pretty sure my newly installed DLSAM is around 34meters from PCP, it has been istalled around the corner in a completely different street lol

At 34 meters from PCP to DSLAM what would be the actual affect on speed?

That sort of distance, depending on how direct the tie-ins run between the PCP and the fibre cabinet, would add a minimum of 68 metres to the line length which would affect the speed by between about 5 and 20 Mbps depending on how long the line to the cabinet is (based on figures published on TBB back in April).

Thanks for reply,

I am on longish line as well to PCP, my estimated speed for my line back in June was 30meg, I guess may not get as much now when cab does go live.

Do not assume that you will be connected to your closest cabinet. I am connected to my second closest .

DrT

In reply to a post by simon194:

In reply to a post by VictorMeldrew:

Is there an actual acceptable distance from PCP > DSLAM ?

pretty sure my newly installed DLSAM is around 34meters from PCP, it has been istalled around the corner in a completely different street lol

At 34 meters from PCP to DSLAM what would be the actual affect on speed?

That sort of distance, depending on how direct the tie-ins run between the PCP and the fibre cabinet, would add a minimum of 68 metres to the line length which would affect the speed by between about 5 and 20 Mbps depending on how long the line to the cabinet is (based on figures published on TBB back in April).

It will add 68m to the voice side but only 34m to the VDSL signal.

In reply to a post by MHC:

In reply to a post by simon194:

In reply to a post by VictorMeldrew:

Is there an actual acceptable distance from PCP > DSLAM ?

pretty sure my newly installed DLSAM is around 34meters from PCP, it has been istalled around the corner in a completely different street lol

At 34 meters from PCP to DSLAM what would be the actual affect on speed?

That sort of distance, depending on how direct the tie-ins run between the PCP and the fibre cabinet, would add a minimum of 68 metres to the line length which would affect the speed by between about 5 and 20 Mbps depending on how long the line to the cabinet is (based on figures published on TBB back in April).

It will add 68m to the voice side but only 34m to the VDSL signal.
[/quote

would that still be about 68m total?

In reply to a post by VictorMeldrew:

In reply to a post by MHC:

In reply to a post by simon194:

... nested quotes trimmed ...

That sort of distance, depending on how direct the tie-ins run between the PCP and the fibre cabinet, would add a minimum of 68 metres to the line length which would affect the speed by between about 5 and 20 Mbps depending on how long the line to the cabinet is (based on figures published on TBB back in April).

It will add 68m to the voice side but only 34m to the VDSL signal.

would that still be about 68m total?

No, just 34m to the VDSL which is what you are interested in.

The cable from te exchange terminates in the PCP. With ADSL (and plain voice with no ADSL/VDSL), that is jumpered across to a pair that feeds your house.

For VDSL, the incoming pair is jumpered to a pair in a tie cable which then goes to the VDSL cabinet where the incoming fibre is terminated. The tie pair connects to an input side and the voice circuit is multiplexed with the data (VDSL) signal. This combined signal is fed back to the PCP on another tie pair and when it reaches the PCP it is jumpered to the cab le connected to your house.

So, the voice goes from PCP to VDSL cabinet and back, whereas the VDSL signal only make one trip, from cabinet to PCP and, in this case, adds 34m to the path length.

Jesus, just used google maps distance calculator,

actual distance from PCP to DSLAM is 92 meters, that cant be good

Edited by deleted (Sun 09-Sep-12 00:31:40)

You sure you got the right one?

In reply to a post by R0NSKI:

You sure you got the right one?

100% sure, maybe Carrillion guy is [censored] off I complained etc,

"Steve Aquilina
NGA Senior Project Manager - North & Scotland"

In reply to a post by R0NSKI:

You sure you got the right one?

got this from openreach

"As you say, the cab is now stood and the power has been connected,
The power company will now have to fit an electric meter and certify that the cabinet is safe.

The next stages will be to connect the fibre optic cable, install and connect cables between the DSLAM and the existing telephony cabinet.
We will have to conduct light loss tests at the DSLAM and test the telemetry. We then move onto commissioning and bring the cab into service.
I don�t as yet have any dates, but will keep you informed of progress."

this was before i realized the distance

I don't think it'll make a HUGE difference. As long as you're nice and near the cab already.

I have around 30 - 50m of cabling on my property alone before the master and still get the full 80Mbps with the modem reporting over 100Mbps attainable.

Edited by ukhardy07 (Sun 09-Sep-12 02:31:26)

sadly I am 385meters from PCP as the crow flies, so gonna be a lot more with cable

Edited by deleted (Sun 09-Sep-12 03:23:03)

Balls

Still reckon you'll get full sync, unless that's 385m of aluminium, even then it'll be near as makes no difference. I'm on 450m of copper, and sync at 74 meg.

I'm 450m and only getting just under 50 meg, think I'e got some sort of fault somewhere - modem keeps re syncing and speeds fluctuate up and down.

http://forum.kitz.co.uk/index.php/topic,11632.0.html

I'm also on about 400-450 metres of copper and, about 6 months ago with ~20 users on the cabinet, sync'd at about 70Mbps. That's since dropped to about 64Mbps as (presumably) the number of users has increased.

I was the very first person on the cabinet, speeds have dropped a little since 20th August (connection day) when maximum obtainable rate was 55 meg, now it's 53 meg but it fluctuates, currently it's on a high

Oh and the FTTC cabinet is literally next to the PCP

Edited by R0NSKI (Sun 09-Sep-12 10:16:28)

Kinda more concerned with distance from PCP to DSLAM,

out of all the DSLAMS in my area, the standard distance is around 2-3meters, I just cant understand why its in a different street

Will take pics today.

Edited by deleted (Sun 09-Sep-12 11:10:55)

[IMG]http://img692.imageshack.us/img692/637/pcp1.png[/IMG]

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[IMG]http://img846.imageshack.us/img846/4089/pcp2.png[/IMG]

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Edited by deleted (Sun 09-Sep-12 12:10:57)

Avoids objections due to being outside windows of home, possible narrowing of pavement and may have been more suitable in terms of power and what over gas/sewer/pipes were already under that bit of pavement.

In reply to a post by MrSaffron:

Avoids objections due to being outside windows of home, possible narrowing of pavement and may have been more suitable in terms of power and what over gas/sewer/pipes were already under that bit of pavement.

The street is wide enough as per pic, also were PCP trench finishes at Duct, there are no windows etc, and was obv place to stand DSLAM.

[IMG]http://img89.imageshack.us/img89/303/pcp3.png[/IMG]

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In reply to a post by VictorMeldrew:

In reply to a post by MrSaffron:

Avoids objections due to being outside windows of home, possible narrowing of pavement and may have been more suitable in terms of power and what over gas/sewer/pipes were already under that bit of pavement.

The street is wide enough as per pic, also were PCP trench finishes at Duct, there are no windows etc, and was obv place to stand DSLAM.

[IMG]http://img89.imageshack.us/img89/303/pcp3.png[/IMG]

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There's an open fence there which could be a possible source of complaint from the owner of the house and why it probably wasn't placed there.