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[BritBrat]

Oh Dear, Router rebooted and speed decreased.

Lets hope its a small glitch.

[NewtronStar]

Oh Dear, Router rebooted and speed decreased.

Lets hope its a small glitch.

You were doing well there for a while, I take it your using the Home Hub 5 ? you can access some stats from it 192.168.1.254

[Bald_Eagle1]

The fact that your IP Profile has also dropped to a very low level suggests that the modem rebooted/resynced, not just the router/hub.

It's very difficult to remotely diagnose what's going wrong here without an unlocked HG612 modem, but I am guessing that the engineer managed to get DLM reset, hence the short-lived higher sync speeds, but something went drastically wrong causing the resync/reboot at a much lower speed.

Are you able to obtain any connection stats at all from the HH5, such as sync speed, SNRM, error counts etc?



It may be worth obtaining (via ebay) a cheap, already unlocked HG612 modem or one that you could easily unlock yourself & then use either mine or Roseway's programs to monitor the connection 24/7 for a while.

e.g:-

http://www.ebay.co.uk/itm/Huawei-Echolife-Hg612-BT-TalkTalk-Modem-/141134851391?pt=UK_Computing_Networking_SM&hash=item20dc4aed3f

At least you would then be able to post a few stats/graphs for us to have a look at.


You may have mentioned it previously, but have you tried running the connection via a dangly filter plugged directly into the the test socket (VDSL faceplate removed to disable all internal wiring etc.)?

[BritBrat]

It may be worth obtaining (via ebay) a cheap, already unlocked HG612 modem or one that you could easily unlock yourself & then use either mine or Roseway's programs to monitor the connection 24/7 for a while.

e.g:-

Already in my search list.

You may have mentioned it previously, but have you tried running the connection via a dangly filter plugged directly into the the test socket (VDSL faceplate removed to disable all internal wiring etc.)?

BT engineer did that and I  did after speed droped, never made any difference.

Only stats I have are below:

Code: [Select]

1. Product name: BT Home Hub
2. Serial number:  *****************
3. Firmware version: Software version 4.7.5.1.83.8.173.1.4 (Type A) Last updated Unknown
4. Board version: BT Hub 5A
5. VDSL uptime: 0 days, 02:04:40
6. Data rate: 799 / 4200
7. Maximum data rate: 9050 / 62460
8. Noise margin: 23.8 / 34.2
9. Line attenuation: 0.0 / 22.6
10. Signal attenuation: 0.0 / 21.1
11. Data sent/received: 13.4 MB / 88.5 MB
12. Broadband username: bthomehub@btbroadband.com
13. BT Wi-fi: No
14. 2.4 GHz Wireless network/SSID: BTHub5-GKPS
15. 2.4 GHz Wireless connections: Enabled (802.11 b/g/n (up to 150 Mb/s)) 20 MHz, WPS enabled
16. 2.4 GHz Wireless security: WPA2
17. 2.4 GHz Wireless channel: 7
18. 2.4 GHz Wireless network/SSID: 
19. 2.4 GHz Wireless connections: Disabled
20. 2.4 GHz Wireless security: None
21. 2.4 GHz Wireless channel: 7
22. 2.4 GHz Wireless network/SSID: BTWifi-with-FON
23. 2.4 GHz Wireless connections: Disabled
24. 2.4 GHz Wireless security: None
25. 2.4 GHz Wireless channel: 7
26. 2.4 GHz Wireless network/SSID: Auto-BTWiFi
27. 2.4 GHz Wireless connections: Disabled
28. 2.4 GHz Wireless security: None
29. 2.4 GHz Wireless channel: 7
30. 2.4 GHz Wireless network/SSID: 
31. 2.4 GHz Wireless connections: Disabled
32. 2.4 GHz Wireless security: None
33. 2.4 GHz Wireless channel: 7
34. 5 GHz Wireless network/SSID: BTHub5-GKPS
35. 5 GHz Wireless connections: Enabled (802.11 a/n/ac (up to 1300 Mb/s)) 80 MHz, WPS enabled
36. 5 GHz Wireless security: WPA2
37. 5 GHz Wireless channel: Automatic (Smart Wireless)
38. 5 GHz Wireless network/SSID: 
39. 5 GHz Wireless connections: Disabled
40. 5 GHz Wireless security: None
41. 5 GHz Wireless channel: Automatic (Smart Wireless)
42. 5 GHz Wireless network/SSID: BTWifi-with-FON
43. 5 GHz Wireless connections: Disabled
44. 5 GHz Wireless security: None
45. 5 GHz Wireless channel: Automatic (Smart Wireless)
46. 5 GHz Wireless network/SSID: Auto-BTWiFi
47. 5 GHz Wireless connections: Disabled
48. 5 GHz Wireless security: None
49. 5 GHz Wireless channel: Automatic (Smart Wireless)
50. 5 GHz Wireless network/SSID: 
51. 5 GHz Wireless connections: Disabled
52. 5 GHz Wireless security: None
53. 5 GHz Wireless channel: Automatic (Smart Wireless)
54. Firewall: Default
55. MAC Address: 18:62:2c:2e:89:9a
56. Software variant: -
57. Boot loader:




[Bald_Eagle1]

These are quite important stats:-

6. Data rate: 799 / 4200
7. Maximum data rate: 9050 / 62460
8. Noise margin: 23.8 / 34.2
9. Line attenuation: 0.0 / 22.6
10. Signal attenuation: 0.0 / 21.1


As VDSL connections use a number of bands, it appears that US attenuation is never reported in the 'single' overall value.
(this is from my connection):-

Code: [Select]

Down Up
SNR (dB): 5.1 6.1
Attn(dB): 24.5 0.0
Pwr(dBm): 12.7 6.6


However, this is the 'per band' data for my connection:-

Code: [Select]

xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 4851 Kbps, Downstream rate = 21880 Kbps
Bearer: 0, Upstream rate = 4877 Kbps, Downstream rate = 20695 Kbps

Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)
Medley Phase (Final) Band Plan
US: (7,32) (871,1200)
DS: (33,859) (1216,1846)
  VDSL Port Details   Upstream   Downstream
Attainable Net Data Rate:      4851 kbps     21880 kbps
Actual Aggregate Tx Power:        6.6 dBm      12.7 dBm
====================================================================================
  VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
  Line Attenuation(dB): 8.1 53.5   N/A   N/A   N/A 21.7 65.7   N/A
Signal Attenuation(dB): 8.1 52.4   N/A   N/A   N/A 30.5 65.4   N/A
SNR Margin(dB): 5.9 6.1   N/A   N/A   N/A 5.1 5.1   N/A
TX Power(dBm): -0.8 5.9   N/A   N/A   N/A 11.7 5.9   N/A




A HG612 would provide more detail per band, such as DS & US Line/Signal attenuation, SNR per band etc., but the significant details in your stats are the high Noise Margin values & attainable rates (Maximum data rates).

Such high values suggest that much higher sync speeds should be achievable (e.g. as shown in the Maximum data rate values).

However, it appears that DLM has taken action to compenstate for whatever is causing 'interference' & has capped your connection to ridiculously low sync speeds of 0.8 Mbps US & 4.2 Mbps DS.

Until you are able to monitor via an unlocked HG612 it may be worth checking your stats at different times of day/night.
You may then be able to detect patterns of vastly reduced Noise margins etc., suggesting a REIN or HR (High Resistance) issue, either with a regular pattern or completely intermittent.


It does appear that the onus is now on yourself to 'prove' there is still a fault.

 

[BritBrat]

Seems rather strange as my ADSL2 connection was always 11Mbps download and rock steady, I would have thought it also would have suffered from my line.

Unless something has changed.

23 November 2013

[BritBrat]

I don't know if this helps.

ADSL2 Stats 18 November 2013:

Code: [Select]

> adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max:    Upstream rate = 1184 Kbps, Downstream rate = 17916 Kbps
Path:   0, Upstream rate = 1117 Kbps, Downstream rate = 13309 Kbps

Link Power State:       L0
Mode:                   ADSL2+
TPS-TC:                 ATM Mode
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        7.3             9.0
Attn(dB):        32.5            19.5
Pwr(dBm):        19.1            12.3
                        ADSL2 framing
MSGc:           94              13
B:              30              15
M:              1               8
T:              8               7
R:              4               16
S:              0.0802          3.9317
L:              3487            293
D:              384             8
                        Counters
SF:             2493876         397593
SFErr:          168             0
RS:             1995101250              2077212
RSCorr:         202592          56
RSUnCorr:       3850            0

HEC:            91              0
OCD:            0               0
LCD:            0               0
Total Cells:    1257064743              105438099
Data Cells:     36358460                3485669
Drop Cells:     0
Bit Errors:     0               0

ES:             717             112
SES:            57              0
UAS:            39              39
AS:             40051

INP:            1.76            1.74
PER:            16.05           16.34
delay:          7.70            7.86
OR:             49.81           9.30

Bitswap:        5700            4

Total time = 1 days 2 hours 13 min 52 sec
FEC:            7026851         5036
CRC:            3584            172
ES:             717             112
SES:            57              0
UAS:            39              39
LOS:            0               0
LOF:            0               0
Latest 15 minutes time = 13 min 52 sec
FEC:            1789            0
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
Previous 15 minutes time = 15 min 0 sec
FEC:            3050            34
CRC:            2               0
ES:             1               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
Latest 1 day time = 2 hours 13 min 52 sec
FEC:            96683           56
CRC:            120             0
ES:             12              0
SES:            3               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
Previous 1 day time = 24 hours 0 sec
FEC:            521222          328
CRC:            98              8
ES:             67              4
SES:            0               0
UAS:            21              21
LOS:            0               0
LOF:            0               0
Since Link time = 11 hours 7 min 31 sec
FEC:            202592          56
CRC:            168             0
ES:             44              0
SES:            3               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
>



[NewtronStar]

What are you going to do ? I would call the ISP and also use their forums until it's fixed don't waste time finding out how or what caused this just get them to fix it.

[BritBrat]

I have a manager phoning me on Friday so will leave it untill then.

Try and get a router to monitor stats.

The way I have been reading things is 15Mbps is the minimum speed I  should have or the product is not as advertised.

[Chrysalis]

you have intermment noise/rein issues.

Engineer did a bad job in my view, likely tried what he thought was the cheapest things first.

So he swapped out the faceplate, and then told you that was the issue, when in reality it was probably just luck that when he was there the noise wasnt present.  I did find it bizzare you reported such a speed difference from a faceplate change but didnt post then.

As to what the actual fault may be, no idea but it isnt your faceplate (dont think 2 bad ones in row).  Diagnosis you can do yourself in meanwhile is use the test socket (this is legal) and try turning off other devices in your home.

If you reboot the modem (hh5) whilst it still shows those high attainable stats (maximum data rate) you will get your speed back but I suspect it will be temporary only.

[BritBrat]

As to what the actual fault may be, no idea but it isnt your faceplate (dont think 2 bad ones in row).  Diagnosis you can do yourself in meanwhile is use the test socket (this is legal) and try turning off other devices in your home.

If you reboot the modem (hh5) whilst it still shows those high attainable stats (maximum data rate) you will get your speed back but I suspect it will be temporary only.

I have done all that.

With the old face plate fitted phone dial tone would drop the router out and this does not happen now, so I guess the filter was broken.

It was a face plate fault as I was there watching him and with router pluged into normal plug the sound from his tester was low volume, as soon as he removed the face plate and pluged directly into the test socket with a filter it went really loud (modem activity).

So unless he was tricking me he did try to do a good job, did many test with his machine and made a visit to check cabinet connections.

" I did find it bizzare you reported such a speed difference from a faceplate change but didnt post then "

[BritBrat]

Am I right in thinking:

6. Data rate: 799 / 4200
7. Maximum data rate: 9192 / 63166

6 = My current actual speed .79 Mbps Upload and 4.2 Mbps Download
7 = My possible maximum speeds 9.1 Mbps Upload and 63.1 Mbps Download


I am less than 1 km from Cabinet what speed would that equate to?

EDIT:

Found it

[Bald_Eagle1]

No.

799 Kbps = 0.799 Mbps
4200 Kbps = 4.2 Mbps

9192 Kbps = 9.192 Mbps
63166 Kbps = 63.166 Mbps

[BritBrat]

Now your being picky LOL 

Oh I see M not K.

Do you think this is my problem:

8. Noise margin: 23.8 / 34.0

And the line is noisy?

[Chrysalis]

ok I am usually lazy but here goes.

the stats you are posting are all decent except the actual sync speed.

high noise margin means lots of excess dsl signal unused by the connection. so that is not a bad thing sometimes, other times it is.

basically what has happened is at some point the signal on your connection was weakened, it was weakened very significantly.  It was temporary.  since it was so significant it caused your modem to drop the connection and resync using the new available signal strength, which has given you that very low sync speed.

However after that occured your signal was recovered but modems dont automatically drop and resync in that situation they just keep on how they are, this recovered signal is shown in 2 ways.
1 - the high snr margin
2 - the high max data rate (attainable speed)

I dont know if DLM is also playing a part as the hh5 stats you pasted doesnt reveal enough info for that.  If you did reboot the hh5 as I suggested then pasted the stats again after, I could have gave an opniion if DLM has also kicked in.

However its my view DLM isnt your problem here, the problem is something is causing temporary loss of signal on your connection, some kind of noise probably.

The only way this is been fixed is by sheer luck or a competant engineer visiting to find the fault.  there is a chance of course the fault is local to you, but there is also a chance it isnt.  Your issue is the worst I have seen on vdsl for a burst of noise.