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[eraser2002]

Hi all,
I'm on plusnet unlimited extra fiber and use a cisco 887va router.
Two months ago my broadband speed dropped to 43mb, my estimated speed is between 53-75 on the checker.
I had an engineer and he swapped my to a new port on the ECI cab and it synced at 55mb
Everything was fine for weeks and then something happened over the last bank holiday weekend and my error rates were high and its now connected at 47mb with interleaving, which is 2 weeks ago now.
My calculation of errors per second is about 100-120 per day which I understand should be green under the DLM profiles for a MDBE of 720. As of today my SNR is showing 7.1db, but I'm not sure when it will remove the interleaving, I don't think there is a way to force the sync speed in my router which I saw someone recommend in a similar post.
any ideas or am I stuck with this for the foreseeable future, I definitely think the internet is a little more sluggish than before.
Thanks
Chris

[sotonsam]

Hi Chris,

Do you have any stat output from your router at all? Attainable/Sync/Attenuation/SNRM etc. Could you also post your results from the DSL Checker, just so we can see what your clean and impacted ranges are and what (if any) handback threshold is set on your line.

There could be a million and one things causing it - if we start right back at the beginning, have you plugged your router/modem directly into the test socket, thus avoiding any extensions in your home? Do you have a new NTE5c and a SSFP, or old-style DSL filters? If all of that is ok and you've tried that, do you have any noise on the phone line if you plug in a corded phone and dial 17070? (opt. 2). Use the test socket behind the master socket.

The line should be absolutely silent, any crackle, pop, hissing should be noted and reported to your landline provider as a 'voice service' fault, rather than a broadband fault. The resolution of any noise on the copper pair should also improve the broadband service.

[Weaver]

What sotonsam said. And a very warm welcome to the forum!

If it is manual web browsing that feels sluggish, what about pinging your DNS servers and possible changing to better ones and a longer list of alternatives if you have roomin the relevant list in some settings somewhere. There are the high-performing OpenDNS ones - 208.67.222.222 + 208.67.220.220 - (but sign up for an account on their website because then you might be able to turn off the crappy fake responses when there is, or rather there should have been, a not found error). There are also 8.8.8.8 + 8.8.4.4 and the relatively new 1.1.1.1. All of these are fast, use anycast routing and may be miles better than some ISPs’ DNS servers who don't know what they are doing or who are cheapskates and let them become overloaded because they don’t deploy lots of servers and sufficiently serious hardware. If your ISP is clued up, then their own DNS should have an unbeatable advantage because it should be closer than anyone else, so less round trip time and more reliability, both because of fewer hops. So unless there is a clear advantage, stick with your own ISP’s DNS. You would have to ping them both, on IPv4 and IPv6 if you have both.

I just suggest this because I would be amazed if anyone noticed such a speed drop without making measurements and recording some numbers given that your speed is so incredibly high anyway - I enjoy ~7.0 - 7.5 Mbps downstream and 1.2 Mbps upstream from three DSL lines bonded together so you speed is off the charts. But crappy DNS is something that everyone notices as it can really hurt complex websites load times because of stop-and-wait. Can't hurt to check anyway.

[j0hn]

Unfortunately lines need to have considerably lower ES than the MTBE figures to remove interleaving.
It needs to be as low as 20 ES per day for many.

The only way to achieve this is by capping the line.
This can only be done with certain modems.

A recent example of this can be seen on this thread

https://forum.kitz.co.uk/index.php/topic,21600.0.html

[eraser2002]

Hi Guys
Thanks for the responses and help
My line is directly into the master socket, with no extensions. I don't use the telephone except for testing and the line sounds fine. I'm sure its a NTE5 newish one as i asked the engineer if it needed replacing and he said not.
My internet does seem fine tonight, I'm now using opendns in my router as opposed to the plusnet ones to see if that helps.


                       XTU-R (DS)              XTU-C (US)
Chip Vendor ID:         'BDCM'                   'IFTN'
Chip Vendor Specific:   0x0000                   0xD086
Chip Vendor Country:    0xB500                   0xB500
Modem Vendor ID:        'CSCO'                   '    '
Modem Vendor Specific:  0x4602                   0x0000
Modem Vendor Country:   0xB500                   0x0000
Serial Number Near:    FCZ1608C2EE C887VA-W 15.4(3)M8
Serial Number Far:
Modem Version Near:    15.4(3)M8
Modem Version Far:     0xd086

Modem Status:            TC Sync (Showtime!)

DSL Config Mode:         AUTO
Trained Mode:   G.993.2 (VDSL2) Profile 17a
TC Mode:                 PTM
Selftest Result:         0x00
DELT configuration:      disabled
DELT state:              not running

Full inits:             1
Failed full inits:      0
Short inits:            0
Failed short inits:     1

Firmware        Source          File Name
--------        ------          ----------
VDSL            user config     flash:vdsl.bin

Modem FW  Version:      140305_1531-4.02L.03.A2pv6C039h.d24h
Modem PHY Version:      A2pv6C039h.d24h
Trellis:                 ON                       ON
SRA:                     disabled                disabled
 SRA count:              0                       0
Bit swap:                enabled                 enabled
 Bit swap count:         39811                   727
Line Attenuation:         0.0 dB                  0.0 dB
Signal Attenuation:       0.0 dB                  0.0 dB
Noise Margin:             7.1 dB                  6.3 dB
Attainable Rate:        59865 kbits/s            16159 kbits/s
Actual Power:            12.5 dBm                 6.7 dBm
Per Band Status:        D1      D2      D3      U0      U1      U2      U3
Line Attenuation(dB):   11.7    30.0    48.7    5.9     24.9    38.4    N/A

Signal Attenuation(dB): 15.2    29.8    48.7    5.6     24.6    38.2    N/A

Noise Margin(dB):       7.2     7.1     7.1     6.3     6.0     6.5     N/A

Total FECC:             655990                   25680
Total ES:               93                       4012
Total SES:              0                        0
Total LOSS:             0                        0
Total UAS:              36                       820
Total LPRS:             0                        0
Total LOFS:             0                        0
Total LOLS:             0                        0


                  DS Channel1     DS Channel0   US Channel1       US Channel0
Speed (kbps):             0            46930             0             15699
SRA Previous Speed:       0                0             0                 0
Previous Speed:           0                0             0                 0
Reed-Solomon EC:          0           655990             0             25680
CRC Errors:               0              282             0               557
Header Errors:            0              751             0                 0
Interleave (ms):       0.00             8.00          0.00              0.00
Actual INP:            0.00             3.00          0.00              0.00


When the router came online 5 days 11hrs ago after an accidental reset the Error seconds (ES value) were 30 and 3666, so i think its about 100 a day, as j0hn said it doesnt look like its going to get low enough to help.
I guess i just have to be grateful i'm not still on dialup, i keep checking the G.INP thread for ECI but that looks like a pipe dream.

Thanks again,
Chris

[Moderator edited to wrap the posted data with [tt][/tt] tags thus preserving the formatting.]

[Weaver]

You will have to ping the OpenDNS server that it auto-selects by magic on the basis of being nearest to you and then ping the Plusnet ones too, to see how the ping round trip ' latency times compare.

If you can find one with a significantly shorter ping time than Plusnet’s ones then go for that otherwise stick with Plusnet’s but if you do find a much better one then it will make web browsing more snappy, pages will open faster in you web browser and so on. But it obviously won't change your throughput or alter the performance during big downloads or uploads.

[j0hn]

It looks like your Cisco has a Broadcom VDSL chipset.
It looks like it might be the BCM6368 but I can't be sure.

Does it give you telnet access to the Broadcom CLI (detailed stats/works with DslStats)?

[eraser2002]

Hi J0hn
Yes i believe that is the modem in this router
The configuration for the router is through telnet and there are some vdsl modem commands, but i cant find anything to do with setting the sync rate
for example there are commands like to enable SRA - which i dont believe BT support
what sort of command am i looking for?
Thanks
Chris