Is there an issue with my line?

[dai_bonehead]

I think that our FTTC service has degraded over time. When we moved in 12 months a go I was amazed at getting approx 70 Mbps from a cabinet over 700 metres away.

But recently I have noticed that our speed is lower.  We have had openreach out as we were experiencing really poor performance. Line was apparently good but I think something is not right. Our (non BT) router has been having disconnections for no  apparent reason (and I have swapped it for a nother good unit of the same type but to no avail). The BT router was dropped as my kids were experiencing poor wi-fi coverage; the draytek vigor 2760 is a bit old but seems to be better in that regard.

Can you advise what I need to post here to help diagnose the issue?

[pippincp]

Start with a quiet line test. 17070 option 2, best with corded phone but with cordless you may get a background hum. Any noise report a line problem.

Post the connection stats from the router.

If needed we may ask for more.

[dai_bonehead]

Thanks. I will post as soon as I can.

[dai_bonehead]

DrayTek_House> show status

System Uptime:39:21:44

LAN Status

Tx Rate:3381669

Rx Rate:1953761

WAN 1 Status: Connected

Enable:Yes Line:xDSL Name:BT Infinity

Mode:PPPoE Up Time:8:54:00 IP: GW IP:

TX Packets:1850544 TX Rate(bps):12576 RX Packets:4875493 RX Rate(bps):262168

vdsl status

---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------

Running Mode : 17A State : SHOWTIME

DS Actual Rate : 57770000 bps US Actual Rate : 19744000 bps

DS Attainable Rate : 56017344 bps US Attainable Rate : 19748000 bps

DS Path Mode : Fast US Path Mode : Fast

DS Interleave Depth : 1 US Interleave Depth : 1

NE Current Attenuation : 17 dB Cur SNR Margin : 5 dB

DS actual PSD : 7. 5 dB US actual PSD : 12. 9 dB

NE CRC Count : 1 FE CRC Count : 4570

NE ES Count : 5 FE ES Count : 1272

Xdsl Reset Times : 0 Xdsl Link Times : 2

ITU Version[0] : 00000000 ITU Version[1] : 00000000

VDSL Firmware Version : 05-07-04-03-00-07 [with Vectoring support]

Power Management Mode : DSL_G997_PMS_L0

Test Mode : DISABLE

-------------------------------- ATU-C Info ---------------------------------

Far Current Attenuation : 20 dB Far SNR Margin : 6 dB

CO ITU Version[0] : b5004244 CO ITU Version[1] : 434dc190

DSLAM CHIPSET VENDOR : < BDCM >

DrayTek_House> vdsl status more

---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------

Near End Far End Note

Trellis : 1 1

Bitswap : 1 1

ReTxEnable : 1 1

VirtualNoise : 0 0

20BitSupport : 0 0

LatencyPath : 0 0

LOS : 0 0

LOF : 0 0

LPR : 0 0

LOM : 0 0

SosSuccess : 0 0

NCD : 0 0

LCD : 0 0

FECS : 0 196 (seconds)

ES : 5 1272 (seconds)

SES : 4 59 (seconds)

LOSS : 0 0 (seconds)

UAS : 30 12175 (seconds)

HECError : 0 0

CRC : 1 4570

INP : 245 195 (symbols)

INTLVDelay : 0 24 (1/100 ms)

NFEC : 32 32

RFEC : 16 16

LSYMB : 16 16

INTLVBLOCK : 32 32

AELEM : 0 ----

Also noticed on samknows that we have had quite a few disconnections:

[imjolly]

From stats connection time is 39hrs with speed 57mb just above attainable so looks ok.

What about quiet line test?

[dai_bonehead]

Thanks. I'll do the quiet line test as soon as I can dig out an old wired phone.

Funnily enough the router lost connection tonight and rebooted itself

There's definitely something up. 3rd router to display this.

[dai_bonehead]

Router debug dump here:

rayTek_House> sys ver dbg
Router Model: Vigor2760n Version: 3.8.9.5_VT2 English
Profile version: 3.0.0 Status: 1 (0x3ab0d833)
Router IP: 192.168.1.254 Netmask: 255.255.255.0
Firmware Build Date/Time: Jul 23 2021 18:30:03
Router Name: DrayTek_House
Revision: 78809 V385
Current VDSL2 Firmware Version: 05-07-04-03-00-07
ADSL Firmware Version: 05-07-01-08-00-01 Annex A
VDSL2 Firmware Version: 05-07-04-03-00-07

---------firmware exception debug info-----------------------------
EPC=80715744, Cause=20800028, Status=1100fc03, BadAddr=804ec538, RetAddr=80010008
exception id=10(RI: Reserved Instruction)
exception occured in IdleTask Timeout
task_id=137, SP=0x81152920(4138 bytes free, 1864 used bytes)
system tick =14748941
CURRENT_VERSION : 3.8.9.5_R
get from address : 80004000
Dump CPU registers:
-----------------------------------------
$ 0: 00000000 fffffffe 80bac130 3e3c2f73
$ 4: 55555556 00000000 426f6479 3a456e76
$ 8: 656c6f70 0000653e 00000000 00000000
$12: 811529c8 65720000 69646572 00000010
$16: 00000000 81152948 55555556 81152a38
$20: 00000001 82089440 55555556 82090000
$24: 00000010 804f40f4 00000000 82087850
$28: 8105b000 81152920 82090000 80010008
List a possible caller functions:
----------------------------------
func( 0)=804f1cf0
func( 1)=804bd41c
func( 2)=804fafa4
List backtrace functions:
----------------------------------
func( 0)=80715744
func( 1)=426f6479

[dai_bonehead]

Router stats after latest reboot:
ATU-R Information
Type: VDSL2
Hardware: Annex A
Firmware: 05-07-04-03-00-07
Power Mngt Mode: DSL_G997_PMS_L0
Line State: SHOWTIME
Running Mode: 17A
Vendor ID: fe004452 41590000
ATU-C Information
Vendor ID: b5004244 434dc190 [BDCM]
Line Statistics

Downstream Upstream
Actual Rate 57660 Kbps 19778 Kbps
Attainable Rate 56568 Kbps 19785 Kbps
Path Mode Fast Fast
Interleave Depth 1 1
Actual PSD 7. 5 dB 13. 0 dB
Near End Far End
Trellis ON ON
Bitswap ON ON
ReTx 1 1
SNR Margin 5 dB 6 dB
Attenuation 17 dB 20 dB
CRC 0 4570
FECS 0 s 197 s
ES 0 s 1272 s
SES 0 s 59 s
LOSS 0 s 0 s
UAS 30 s 12221 s
HEC Errors 0 0
RS Corrections 0 0
LOS Failure 0 0
LOF Failure 0 0
LPR Failure 0 0
NCD Failure 0 0
LCD Failure 0 0
NFEC 32 32
RFEC 16 16
LYSMB 16 16

[DavidM]

Hi @dai_bonehead and welcome back, it's been a while.

Thanks for posting about the connection dropping, sorry you're having a few problems there. The guys are right. Can you check the quiet line test and get back to us with the results and we can take it from there.

Cheers

David

[dai_bonehead]

So I managed to dig out an old wired phone. Quiet line test was not consistent.

First test, I plugged it into the BT master test socket with a microfilter. I could hear some interference.

Second test, I disconnected the microfilter, and then reconnected the BT faceplate; note that the modem was not connected at this point. Phone was plugged in and then I could also hear interference.

I decided to test again as the first test but with a different microfilter. Line seemed a lot quiter.

Reconnected the faceplate and again quiet.

However, when I plugged in the modem I think I could hear some interference. So I am unsure if this helps or not. What is my next step?

Thanks.