BT Infinity & FTTx Discussion

russ9898 said:
Fingers crossed when fibre is available the estimate of 66mbit BT are giving will increase. I'm only 200m walk from the cab and can see roughly how the ducts run by following the various BT pits in the pavement so it shouldn't be a wildly longer run.
Click to expand...

At that distance, you'll be getting the full 76Mb/s as far as I can tell. :)
 
Oh thanks BT. What happened to my line speed capability of 75 down and 8 up. Not even 40/20...

3012872642.png


Any clues?

Traces from my router:

Code: 
Trace through WAN1.
traceroute to 212.58.253.67, 30 hops max through WAN1 protocol ICMP
  1  217.32.146.171        80 ms
  2  217.32.146.238        70 ms
  3  217.32.147.226        70 ms
  4  217.41.168.235        70 ms
  5  217.41.168.109        70 ms
  6  109.159.249.218       70 ms
  7  109.159.249.149       80 ms
  8  109.159.255.101       70 ms
  9  194.74.65.42          70 ms
 10 Request timed out.     *
 11  132.185.254.93       120 ms
 12  132.185.255.156      120 ms
 13  212.58.253.67        120 ms
Trace complete.

Code: 
Trace through WAN2.
traceroute to 212.58.251.195, 30 hops max through WAN2 protocol ICMP
  1  217.32.146.171        20 ms
  2  217.32.146.222        10 ms
  3  217.32.147.226        10 ms
  4  217.41.168.229        10 ms
  5  217.41.168.109        10 ms
  6  109.159.249.196       10 ms
  7  109.159.249.143       20 ms
  8  109.159.255.103       10 ms
  9  194.74.65.42          10 ms
 10 Request timed out.     *
 11 Request timed out.     *
Trace complete.

And from the laptop

Code: 
traceroute to google.co.uk (173.194.34.119), 64 hops max, 52 byte packets
 1  10.0.0.1 (10.0.0.1)  13.747 ms  1.470 ms  4.230 ms
 2  217.32.146.171 (217.32.146.171)  55.963 ms  68.940 ms  69.763 ms
 3  217.32.146.238 (217.32.146.238)  65.506 ms  70.056 ms  67.945 ms
 4  217.32.147.210 (217.32.147.210)  72.738 ms  157.006 ms  202.966 ms
 5  217.41.168.235 (217.41.168.235)  385.786 ms  290.610 ms  388.338 ms
 6  217.41.168.109 (217.41.168.109)  278.216 ms  263.368 ms  381.877 ms
 7  109.159.249.196 (109.159.249.196)  313.091 ms
    acc2-10gige-0-1-0-6.l-far.21cn-ipp.bt.net (109.159.249.222)  153.276 ms
    109.159.249.240 (109.159.249.240)  71.483 ms
 8  core1-te0-15-0-16.faraday.ukcore.bt.net (109.159.249.157)  78.421 ms
    core2-te0-15-0-5.faraday.ukcore.bt.net (109.159.249.155)  76.149 ms
    core2-te0-15-0-4.faraday.ukcore.bt.net (109.159.249.153)  71.372 ms
 9  peer1-xe8-3-1.telehouse.ukcore.bt.net (213.121.193.109)  70.998 ms
    peer1-xe8-0-0.telehouse.ukcore.bt.net (109.159.254.173)  38.400 ms
    peer1-xe8-3-1.telehouse.ukcore.bt.net (213.121.193.109)  70.792 ms
10  195.99.126.113 (195.99.126.113)  70.881 ms
    195.99.126.111 (195.99.126.111)  70.976 ms  70.903 ms
11  209.85.252.188 (209.85.252.188)  74.263 ms  97.563 ms  70.974 ms
12  209.85.253.47 (209.85.253.47)  69.820 ms  71.645 ms  73.383 ms
13  lhr14s20-in-f23.1e100.net (173.194.34.119)  66.055 ms  70.899 ms  71.189 ms
 
ISP: BT Retail
Package Details: Unlimited BT Infinity 2.
Estimated speed given when signing: 51.5Mb/s.

So I've had BT Infinity a while and have now got used to it. Speedtest result when the connection first went live was about 55Mb/s download and 17MB/s upload. The IP Profile was 57.1Mb/s download and 20Mb/s upload.

After a few weeks speedtest results went down to 52Mb/s, and from looking the IP Profile had gone down to 53.89Mb/s download. So that's pretty much spot on the 51.5Mb/s estimate and I'm not complaining, that's fast enough for me! The upload speedtest and IP Profile both stayed the same.
It then stayed perfectly stable at this speed and up until now I've been perfectly happy - loving that FTTC is finally available on my exchange (I thought we were never going to get it!).

This week (Thursday 3rd October at 1PM) for some reason the connection dropped and then came back online with a new IP address. Don't know why it dropped suddenly when it never normally does and is perfectly stable, but for whatever reason it did (there was an OpenReach van next door if that's any coincidence?).

Since this drop, the pings and upload speed are fine. But... the download speed has taken a nosedive. Speedtest results are now 35Mb/s.
Doing the BT Wholesale test I can see that this is because my IP Profile has been knocked right down. The IP Profile now since Thursday is 36.7Mbps, down from 53.89Mb/s before (but the upstream profile is still 20 Mbps).

So obviously I'm not a happy chappy that one loss of sync on a previously perfectly stable connection has reduced by IP Profile by over 17Mb/s!

So the question is... what can I do to get the speed back? I guess the IP Profile has to be reset somehow?
 
Westyfield2 said:
ISP: BT Retail
Package Details: Unlimited BT Infinity 2.
Estimated speed given when signing: 51.5Mb/s.

So I've had BT Infinity a while and have now got used to it. Speedtest result when the connection first went live was about 55Mb/s download and 17MB/s upload. The IP Profile was 57.1Mb/s download and 20Mb/s upload.

After a few weeks speedtest results went down to 52Mb/s, and from looking the IP Profile had gone down to 53.89Mb/s download. So that's pretty much spot on the 51.5Mb/s estimate and I'm not complaining, that's fast enough for me! The upload speedtest and IP Profile both stayed the same.
It then stayed perfectly stable at this speed and up until now I've been perfectly happy - loving that FTTC is finally available on my exchange (I thought we were never going to get it!).

This week (Thursday 3rd October at 1PM) for some reason the connection dropped and then came back online with a new IP address. Don't know why it dropped suddenly when it never normally does and is perfectly stable, but for whatever reason it did (there was an OpenReach van next door if that's any coincidence?).

Since this drop, the pings and upload speed are fine. But... the download speed has taken a nosedive. Speedtest results are now 35Mb/s.
Doing the BT Wholesale test I can see that this is because my IP Profile has been knocked right down. The IP Profile now since Thursday is 36.7Mbps, down from 53.89Mb/s before (but the upstream profile is still 20 Mbps).

So obviously I'm not a happy chappy that one loss of sync on a previously perfectly stable connection has reduced by IP Profile by over 17Mb/s!

So the question is... what can I do to get the speed back? I guess the IP Profile has to be reset somehow?
Click to expand...

So I got lucky whilst out in the garden earlier. Parked up was an OpenReach van, who had just been in next door sorting out "internet problem".

Spoke to him and he offered to do me a DLM reset :). He said that if it didn't bring the speeds back up to what they were pre-thursday, then I should call up to report the fault.

Looking at the TBBQM graph, at 2:30PM (just after speaking with him) my modem lost sync, and now the routers got a new IP address. So in effect as-well as whatever it was he did in the OpenReach system to reset the DLM, the modem has done a resync (and I can maintain my record of never having unplugged it!)

Doing a speedtest now an hour and a half later I'm getting 39.3Mb/s. And on the Wholesale test the IP Profile is for 40.7Mb/s.

So the good news is that the IP Profile is now +4MB/s on what it was this morning :) (thanks to the DLM reset and resync), but at 40.7Mb/s that's still 13meg less than what it was pre-thursday (53.89Mb/s) :(.

Suggestions on what I do next?
 
Something I don't understand.

FTTC works by fibre to the cabinet then normal copper telephone from this to premises right?

If this is the case why does the ADSL speed not alter? It says i can get 40mbit fttc yet only 2.5mbit DSL. Before the cabinet was fttc enabled I was syncing at 4mbit.

Surely the line should sync at a higher speed, im guessing an FTTC cabinet does not use copper to go back to the exchange for DSL users?
 
@twoblacklines

You are correct. The backlink from the FTTC cabinet is fibre optic.

With ADSL the DSLAM is in the exchange, so your phone line has to (electrically, not physically) run the entire distance from your premises to the exchange. With FTTC, the DSLAM is in the fibre cabinet and does the same job as the ADSL DSLAM - splitting voice from data - and the data side is carried via fibre optics back to the exchange. The voice side leaves the DSLAM and rejoins the normal copper trunk line. Also the DSLAM inside the FTTC cabinet uses VDSL, not ADSL.

When you are moved over to FTTC, the OpenReach engineer physically reconnects your line to a different set of connectors inside the normal telephone roadside cabinet (PCP). Those connectors are joined to a copper hardline that goes from the PCP to the DSLAM in the fibre cabinet.
 
FTTC stands for Fibre to the cabinet. (From the exchange to the cabinet)

Currently your broadband is provided via copper cable from your house to the cabinet and copper cable from the cabinet to the exchange.

If you pay for a fibre broadband your paying for a premium service which means your broadband is delivered via fibre optic cables from the exchange to the cabinet and then via your existing copper phone line from cabinet to your house.

The benefit of fibre optic over copper is no signal loss due to the resistance of the cable. (resistance increases the longer the cable is). So if you live miles away from the exchange but a few hundred meters from an FTTC enabled cabinet that's why you can see an increase in sync speed as your only using a few hundred meters of copper cable and not a few miles.

Hope that sounds as clear as it did in my head lol
 
Please don't hotlink.

Upload the image yourself at imageshack, photobucket, imgur or any other number of free hosting websites.
 
And I take it FTTP basically connects your premises to the FTTC cabinet via fibre?

So they quoted me £121,000 to fit a fibre cable a whole 650 meters to the cabinet?

Thankyou for the explanations!
 
twoblacklines said:
And I take it FTTP basically connects your premises to the FTTC cabinet via fibre?

So they quoted me £121,000 to fit a fibre cable a whole 650 meters to the cabinet?

Thankyou for the explanations!
Click to expand...
No, the fibre is blown from the nearest manifold in the street (usually near the FTTC cabinet), all the way to your home.

It's then terminated inside via an ONT (optical network termination) point.

There's no copper with FTTP/FTTH... and who the hell quoted you £121k?!
 
Depends what the 650m distance is made up of. If you're crossing major roads etc then it can easily get up that high. I imagine if it was FTTP on Demand though it would be declined rather than quoted at that price.
 
just had new fibre cabinet installed close to my house, this was immediately reflected in the BT broadband checker saying I will be able to get up to 80mb when live :-).

Does this mean the cabinet is connected up etc or is the info just derived from proximity?
 
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