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Standard User deleted
(deleted) Tue 19-Apr-11 18:07:57
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Re: FTTC Cab Connections


[re: chris6273] [link to this post]
 
I'm getting confused here. The FTTC DSLAM has room for 200 people to have Infinity. The old green cab that's been there for years with the phone lines for however many there is

iechyd da
Standard User chris6273
(member) Tue 19-Apr-11 18:29:14
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Re: FTTC Cab Connections


[re: deleted] [link to this post]
 
In reply to a post by paul1360:
I'm getting confused here. The FTTC DSLAM has room for 200 people to have Infinity. The old green cab that's been there for years with the phone lines for however many there is

iechyd da


Customers only get their lines transferred over to the FTTC Cabinet if they purchase an FTTC package.

People who are not on FTTC packages go through the old Green cabinets and through the E-line as they used to (nothing is changed).

-------------------------------------------------------------------
6851kbps Throughput:
My Broadband Speed Test

Downstream Upstream
Connection Speed 8128 kbps 448 kbps
Line Attenuation 13.0 db 10.0 db
Max(Kbps): 11616 1056
Standard User deleted
(deleted) Tue 19-Apr-11 18:55:13
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Re: FTTC Cab Connections


[re: chris6273] [link to this post]
 
That would assume 1:1 contention on the FTTC backhaul which I dont believe is guaranteed


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Standard User orly
(fountain of knowledge) Tue 19-Apr-11 19:01:22
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Re: FTTC Cab Connections


[re: deleted] [link to this post]
 
Me neither.

It also assumes everyone syncs/connects at the full 40Mbit, which is essentially impossible in the real world.

---
BT Infinity 8th July 2010
(NIBA)
600m (approx) to cabinet
25.5mbit down / 7.6mbit up

Click here to see Comparison of FTTC ISPs
Which FTTC ISP do you use?
Standard User chris6273
(member) Tue 19-Apr-11 19:07:44
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Re: FTTC Cab Connections


[re: deleted] [link to this post]
 
In reply to a post by Ribble:
That would assume 1:1 contention on the FTTC backhaul which I dont believe is guaranteed


If LLU Providers are present at a particular FTTC exchange, I think BTo have to make the capacity available to the cabinet provided the ISPs pay for it (Obviously not everyone will sync at 40Mbps).

-------------------------------------------------------------------
6851kbps Throughput:
My Broadband Speed Test

Downstream Upstream
Connection Speed 8128 kbps 448 kbps
Line Attenuation 13.0 db 10.0 db
Max(Kbps): 11616 1056
Standard User deleted
(deleted) Wed 20-Apr-11 08:39:15
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Re: FTTC Cab Connections


[re: chris6273] [link to this post]
 
Everyone around by me are getting 37Mb to 38Mb and 8Mb - 9Mb.
I popped down to a mates house who is a lot further away from the cab than use and he's got the same. Yes there are still people off my cable using Sky,Talk Talk et al (my son is 1)

iechyd da
Standard User Saltank
(member) Wed 20-Apr-11 10:09:49
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Re: FTTC Cab Connections


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
In reply to a post by Saltank:
Magically, the FTTC checker now states that it's available (again). Two weeks ago it said it was, then vanished, now it says it's available again.

This is essentially for business premises, and I've got my own new line being installed on the 6th of May (via XLN), I'm wondering if I could place my order for FTTC immediately so that they could come and install it either on the same day or within a few days, as it's urgent and I can't wait any longer. Is this possible?
It's possible to get a "Simultaneous Provide" of a line and ADSLx, so it may be possible with FTTC. It depends how well developed the new ordering system is, assuming it is new. I don't know.

However, even if it is possible, you have almost certainly missed the boat. On line + ADSLx you have to specify you want a SIM Provide at the time you order the line, and you are then given a LORN, Linked Order Reference Number. You then order your broadband with the LORN associated with it, if your chosen ISP has ever heard of them and their system can handle it.

It is impossible to get a LORN after the line is ordered frown. You have to wait until it is installed so that you have the phone number to order against.


You were right about that. I told off the guys at XLN for not knowing about this, even though I explicitly told them I need to order broadband really fast. So now I'm stuck with waiting until 6th of May to make an order. UGH! Horrendous!

My Broadband Speed Test
Standard User deleted
(deleted) Wed 04-May-11 08:23:11
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Re: FTTC Cab Connections


[re: deleted] [link to this post]
 
Just an update there are 130 people now getting Infinity from my cab and still no drop in speed

iechyd da
Standard User deleted
(deleted) Wed 04-May-11 10:33:26
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Re: FTTC Cab Connections


[re: deleted] [link to this post]
 
Hi Paul, how are you able to find that out, or is it just a case of door-stepping the OR engineer when he's there?
Standard User deleted
(deleted) Wed 04-May-11 13:26:12
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Re: FTTC Cab Connections


[re: deleted] [link to this post]
 
That sounds impressive. Were you originally estimated at full speed?

IIRC crosstalk is rejected by the use of twists in the copper pairs, and even more so with tighter twist rates, and when the twist rate differs for different pairs within the same core.

I imagine that the new cables that connect the old & new cabinets are designed to be very resistant to crosstalk at VDSL frequencies, as these cables are guaranteed to be carrying a dense fill of such subscribers.

However, I guess the existing D-side cables are probably not quite so high spec, and open to more crosstalk. However, the D-side cables are likely to be less densely crowded with VDSL2, so statistically, you get a little less affected. In this case, the 130 subscribers are now diluted across the total number served by the original cabinet (maybe 300-400???)

More than anything, it is going to be the spec (and age) of the D-side, and the luck of the draw in whether your line routes down the same core as other VDSL customers, and how many there are.

How many pairs are there in the "normal" case of D-side distribution cable?
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