80/20 FTTC Trial Open

[#1]

A slight improvement than the past 2 days but still worse than before the trial. 

[#2]

Hi Cathotel,

Quote from: Cathotel

Recently I have had access to more info and can see my max supported down rate was 45 M with 5.5 SNR with a line sync of 40 Mbps and max up rate of 7 Mbps with SNR of 6 hence my conclusion that I will revert to a stable 40/2.

That's very interesting (to me - as a comparison with my "similar" length of connection).

# xdslcmd info --pbParams 
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:	2
Max:	Upstream rate = 5892 Kbps, Downstream rate = 31352 Kbps
Path:	0, Upstream rate = 5911 Kbps, Downstream rate = 23670 Kbps
Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783) 
DS: (32,859) (1216,1963) (2792,3939) 
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) 
DS: (32,859) (1216,1963) 
       VDSL Port Details       Upstream        Downstream
Attainable Net Data Rate:       5892 kbps         31352 kbps
Actual Aggregate Tx Power:        6.3 dBm          12.0 dBm
============================================================================
  VDSL Band Status        U0      U1      U2      U3      D1      D2      D3
  Line Attenuation(dB):	 8.2	 52.9	 63.9	  N/A	 21.5	 63.2	 65.7	
Signal Attenuation(dB):	 14.6	 52.3	  N/A	  N/A	 21.5	 63.2	  N/A	
        SNR Margin(dB):	 6.1	 6.0	  N/A	  N/A	 9.3	 10.4	  N/A	
         TX Power(dBm):	-4.3	 5.8	  N/A	  N/A	 10.9	 5.5	  N/A	

My attenuation levels currently appear too high to achieve anything from the highest band plans & I don't currently get that much from the middle band plan either.
How are your attenuation levels in comparison?
Cheers,
Paul

[#3]

Quote from: KevinG

... but I hadn't unlocked the modem then (this is very easy to do and only takes a couple of minutes).

KevinG -  this is interesting and it would be very helpful to starting to figure out what's going on if I could see my line stats.  Please can you tell me how to do it?

[#4]

Gaaaahhh!
Just used Speedtest and tried a few different servers - results for download were between 13mpbs and 21 mbps. Then used Bt speedtester and got 9.76 mbps upload but only 3mbps download.
The upload speeds seem fairly consistent aroung 10mbps, but my download speeds are all over the place. I know it's a trial but something fundamental is not right here.

[#5]

Quote from: garywood84

Quote from: KevinG ... but I hadn't unlocked the modem then (this is very easy to do and only takes a couple of minutes). KevinG -  this is interesting and it would be very helpful to starting to figure out what's going on if I could see my line stats.  Please can you tell me how to do it?

It's explained here: http://huaweihg612hacking.wordpress.com/about/
It sounds a bit daunting but is fairly straightforward once you get to it. Click on the link on the right "Instructions for unlocking the Huawei HG612". You will need the link below it to download the actual firmware.
The modem uses 192.168.1.1 so, having unlocked it I now have my router on 192.168.1.2 with one of the LAN ports connected to LAN2 on the modem, so that I can access both the modem and the router without having to disconnect anything, but you don't have to do this to start with, just follow the instructions!

[#6]

Hi Bald_Eagle1,
Strange things are afoot here!  The BT Speed tester still tells me my IP Profile down is 43.14 Mbps with a speed of 2 Mbps !!! but generally I get no more than 36 Mbps either on 40/2 or 80/20.
I bought my own Huwaei HG612 from that famous auction site and applied the unlock firmware a couple of days before the 80/20 went live mainly so I wouldn't have egg on the proverbial if it went belly up !   I have still got my recently replaced untouched one for comparison in the future.
Before I went 80/20 I had a line sync rate down of 39999 Kbps with a max achievable of approx 47000 Kbps and up was 2000 Kbps with a max achievable of 7500 Kbps
The only thing that's happened is that 2 days into the trial Interleaving was switched back on and the line rate dropped 3.  If I'd had more time to study the stats from my own modem  I really wouldn't have bothered with the trial as it was never going to perform any better apart from the upload which TBH I don't use.
From my earlier post I mentioned I got typically 31 Mbps profile upto the 11th Nov when it jumped up 6 or 7 Mbps which compares to yours I guess?
How far is your FTTC cab from the exchange? mine's a good 2.5 - 3 km depending on route.
You'll see that my current actual line rate is 39989 Kbps as below.
I don't pretend to understand fully the results of xdslcmd info --pbParams but they are at the bottom for your comparison.
Cheers,
Pete
# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max:    Upstream rate = 7836 Kbps, Downstream rate = 43928 Kbps
Path:   0, Upstream rate = 8046 Kbps, Downstream rate = 39989 Kbps
Link Power State:       L0
Mode:                   VDSL2 Annex B
VDSL2 Profile:          Profile 17a
TPS-TC:                 PTM Mode
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
               Down            Up
SNR (dB):        4.6             5.8
Attn(dB):        0.0             0.0
Pwr(dBm):        12.4            1.8
                       VDSL2 framing
                       Path 0
B:              63              223
M:              1               1
T:              64              41
R:              16              14
S:              0.0509          0.8843
L:              12570           2153
😧              633             1
I:              80              119
N:              80              238
                       Counters
                       Path 0
OHF:            85783878                1009313
OHFErr:         1045            606
RS:             3585651190              2783868
RSCorr:         11535821                1497
RSUnCorr:       93207           0
                       Path 0
HEC:            30849           0
OCD:            0               0
LCD:            0               0
Total Cells:    3287646511              0
Data Cells:     17662849                0
Drop Cells:     0
Bit Errors:     0               0
ES:             11511           848
SES:            61              0
UAS:            49              49
AS:             210474
                       Path 0
INP:            3.00            0.00
PER:            2.44            9.06
delay:          8.00            0.00
OR:             78.56           28.24
Bitswap:        55801           2846
#
# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max:    Upstream rate = 7870 Kbps, Downstream rate = 44044 Kbps
Path:   0, Upstream rate = 8046 Kbps, Downstream rate = 39989 Kbps
Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3939)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963)
      VDSL Port Details       Upstream        Downstream
Attainable Net Data Rate:       7870 kbps         44044 kbps
Actual Aggregate Tx Power:        1.8 dBm          12.4 dBm
============================================================================
 VDSL Band Status        U0      U1      U2      U3      D1      D2      D3
 Line Attenuation(dB):  7.8     41.4    59.5     N/A    19.1    50.6    0.1
Signal Attenuation(dB):  11.7    40.9    57.5     N/A    19.1    50.6     N/A
       SNR Margin(dB):  5.7     5.8     5.8      N/A    4.6     4.6      N/A
        TX Power(dBm): -4.2    -3.4    -1.6      N/A    10.6    7.8      N/A
#

[#7]

Paul,
I think you're fundamentally correct about lines previously working below 40Mbps (37.5), removing a downstream cap that's higher than the line can achieve is not really going to achieve anything.  I do still think it's worthwhile to trial and validate the theory.  Some who don't get any extra downstream are, however, obtaining higher upstream than would otherwise be possible and this alone may make it worthwhile for a few users.
One thing that puzzles me is that I cannot achieve the maximum downstream (never expected it and I'm not really disappointed either) but my VDSL2 stats indicate that I could still achieve much more upstream if the cap on that were lifted - My downstream sync is currently 62768, upstream is capped at 20000 but the my router-modem recons it could sync at 31887 up so why do the down/up rates on the products (40/2, 40/10 & 80/20) not match the achievable rates better - i.e. why not offer 40/20, 80/40 for example for customers running servers who would benefit as much from increased upstream as downstream since VDSL2 seems quite suited to this?

[#8]

Just done another speedtest, 10mbps upload and finally a bit better download at 31mbps - especially when my current line speed according to my account is 34mbps. Shouldn't this be at 80mbps now thanks to the trial?

[#9]

Well I don't think it should be 34 - 20 or 37 should work though, bizarrely!

[#10]

Quote from: garywood84

Assuming [interleaving has been activated] ..., am I stuck with it forever now, or will it turn it off again if line conditions improve?  Or, could I request it be set to "Off", once I'm out of the training phrase?

Anyone know the answer to this?  Is there an option to have interleaving set to "Off" like on ADSL?
My speeds seem to be higher again now, but I'm getting an IP profile of only 73Mb, where originally it was 78Mb.  I suspect this is because interleaving has been turned on, beause the ping is also higher (about 40ms, where it was 8-11).

[#11]

Still waiting for a router to trial.  It is in the post should be here next week.. 
I wonder why when it rains my download speed is affected and decreases by about 1 to 2Mbit  ? 

   

[#12]

Quote from: NRV618

I wonder why when it rains my download speed is affected and decreases by about 1 to 2Mbit  ?

Rain always affected my ADSL speeds, haven't noticed it significantly affecting fibre yet.

[#13]

Quote from: garywood84

Anyone know the answer to this?  Is there an option to have interleaving set to "Off" like on ADSL? My speeds seem to be higher again now, but I'm getting an IP profile of only 73Mb, where originally it was 78Mb.  I suspect this is because interleaving has been turned on, beause the ping is also higher (about 40ms, where it was 8-11).

I've a horrible feeling the answer is no, at least not by anyone other than Openreach. Lucky you, only losing 5Mb, I've lost 10!

[#14]

Just a quick update:
I started on the trial on 23 Feb. My BT IP profile has remained stable at 67.53 down and 20 up. (on 40/2 my downstream IP profile was 37 and actual throughput was up to about 32). Speedtest.net was initially giving speeds of up to 64Mb/s down, but since I've installed the new ZyXEL router instead of the Netgear I've not seen anything higher than 60.62 - there can be big variations depending on which server is used and the time of day. Upstream was averaging around 15.95 with the Netgear but but recently with the ZyXEL  has been around 15.35.
At some stage (but not today) I'll reinstall the Netgear and see if the speeds can get back to what they were at the beginning. I haven't unlocked my modem, so I can't tell you anything about interleaving or sync speeds.
This is all with a wired connection. I don't have any wireless devices that could maximise the ZyXEL's N300 output so I can't test differences between it and the Netgear for wireless performance.
Graham

[#15]

Hi
how long does it take for the routers to be sent out i was told the router was ordered on the 28th when they placed the trial fttc order and i should have it in a few days but i havent had anything yet and the order on the control panel still shows pending despatch
Thanks
Russell