Technical Discussion
  >> Technical Issues


Register (or login) on our website and you will not see this ad.


  Print Thread
Standard User Eeeps
(newbie) Wed 12-Oct-16 16:17:37
Print Post

Estimating Line Length for EO line (PCP at Exchange)


[link to this post]
 
I've recently ordered Sky Fibre Max as a move from my shockingly bad VM service.

As this will require the re-connection of an old line (last used 20 years ago), the DSL checker used my address to estimate the line speeds...

VDSL Range A (Clean) 80 80 20 20
VDSL Range B (Impacted) 80 63.3 20 18.7

I'd like to estimate the speed from the real line length myself and the route (all underground) looks quite obvious except for the section around the exchange.

My question.
When an EO line is moved to a PCP placed in the exchange compound, do they keep the original bundle routed to the exchange building and then put in an extra segment to the new PCP? Or do they break the bundle and re-route it to the PCP directly. I'd estimate an extra 20m if it goes to the exchange building first.

If the bundle is re-routed then my worst estimate of distance (by road walking route) is about 140m.

Thanks,

Ian
Administrator MrSaffron
(staff) Wed 12-Oct-16 16:21:29
Print Post

Re: Estimating Line Length for EO line (PCP at Exchange)


[re: Eeeps] [link to this post]
 
They do the re-arrangement so no copper carrying VDSL2 enters the exchange building.

At 140m full sync should be achievable so long as wiring in home is not a problem.

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User BatBoy
(sensei) Wed 12-Oct-16 16:26:47
Print Post

Re: Estimating Line Length for EO line (PCP at Exchange)


[re: Eeeps] [link to this post]
 
Looks like you'll get full sync speed regardless


Register (or login) on our website and you will not see this ad.

Standard User Eeeps
(newbie) Wed 12-Oct-16 16:34:12
Print Post

Re: Estimating Line Length for EO line (PCP at Exchange)


[re: MrSaffron] [link to this post]
 
Thanks for the reply.

Makes sense - otherwise they would put the VDSL equipment in the exchange building. Is this for ADSL2 interoperation reasons?

Do they re-route the complete bundle or only those lines that have VDSL2 activated?

Thanks,

Ian
Standard User Ignitionnet
(knowledge is power) Wed 12-Oct-16 16:36:45
Print Post

Re: Estimating Line Length for EO line (PCP at Exchange)


[re: Eeeps] [link to this post]
 
The entire bundle is rerouted.
Standard User Eeeps
(newbie) Thu 13-Oct-16 11:10:15
Print Post

Re: Estimating Line Length for EO line (PCP at Exchange)


[re: Ignitionnet] [link to this post]
 
Thanks Igni,

Just one more question.

Are all EO bundles moved when the new PCP goes live or is each bundle only moved when the first subscriber on that bundle orders VDSL?

Thanks,

Ian
Administrator MrSaffron
(staff) Thu 13-Oct-16 12:06:26
Print Post

Re: Estimating Line Length for EO line (PCP at Exchange)


[re: Eeeps] [link to this post]
 
By the time the cabinet says live, then lines going via that cabinet will all have been moved.

NOTE: Some exchanges have a number of EO bundles leaving them, so just because one cluster of EO now has FTTC available does not mean all bundles will have it available. Or put another way, sometimes multiple cabinets are needed and for some bundles it will be located closer to the EO premises to avoid long VDSL2 lines.

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Eeeps
(learned) Mon 24-Oct-16 19:53:50
Print Post

Re: Estimating Line Length for EO line (PCP at Exchange)


[re: MrSaffron] [link to this post]
 
Just to finish this thread. VDSL2 connected and enabled today - very pleased.

Stats from the Sky supplied Q Hub

Broadband Link Downstream Upstream
Connection Speed 79987 kbps 19999 kbps
Line Attenuation 9.9 dB 0.0 dB
Noise Margin 18.7 dB 23.23 dB

Pings to bbc.co.uk showing as 9ms (is that fast path?)

Unfortunately it does not indicate achievable rate.
I guess the 18.7dB noise margin should give me enough headroom for future cross talk.

Now to look for a stand alone modem.
Standard User WWWombat
(knowledge is power) Sat 29-Oct-16 15:02:19
Print Post

Re: Estimating Line Length for EO line (PCP at Exchange)


[re: Eeeps] [link to this post]
 
In reply to a post by Eeeps:
Line Attenuation 9.9 dB 0.0 dB
Noise Margin 18.7 dB 23.23 dB

Unfortunately it does not indicate achievable rate.
I guess the 18.7dB noise margin should give me enough headroom for future cross talk.


I have an attenuation of 8.7dB, and the noise margin is currently 11.2dB, with an attainable of 102Mbps ... but that is with 6 years for crosstalk to have had an impact.

I'd expect you to be somewhere in the region of 120-130Mbps. But you can easily expect it to drop away to under 100Mbps.
  Print Thread

Jump to