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Never seen SNR this low

Gel
Seasoned Pro
Posts: 1,475
Thanks: 150
Fixes: 12
Registered: 02-08-2007

Never seen SNR this low

I'm on end of a long line and normally achieve around 3mbs d/load.
What would explain the low reading below for SNR currently?
Thanks
Never seen this low before.
Upstream Downstream
Current Rate (Kbps) 448 2944
Max Rate (Kbps) 916 3008
SNR Margin (dB) 15 0.5
Line Attenuation (dB) 31.5 56.5
Occupancy (%) 48 97
Errors (Pkts) 0 0
13 REPLIES
Community Gaffer
Community Gaffer
Posts: 17,642
Thanks: 635
Fixes: 160
Registered: 05-04-2007

Re: Never seen SNR this low

Could be many things really, hard to tell just from the stats unfortunately. Hopefully the SNR being that low hasn't caused any issues though.
If this post resolved your issue please click the 'This fixed my problem' button
 Chris Parr
 Plusnet Staff
Gel
Seasoned Pro
Posts: 1,475
Thanks: 150
Fixes: 12
Registered: 02-08-2007

Re: Never seen SNR this low

Thanks Chris; speed now dropped, and SNR up.
Page loading times at 0.5snr was painful:
Upstream Downstream

Current Rate (Kbps)
448 1984

Max Rate (Kbps)
912 2176
SNR Margin (dB)
15 9.5
Line Attenuation (dB)
31.5 56.5
Occupancy (%)
49 91
Errors (Pkts)
0 0
Gel
Seasoned Pro
Posts: 1,475
Thanks: 150
Fixes: 12
Registered: 02-08-2007

Re: Never seen SNR this low

Router always on here, but on checking at 7am, not internet light.
Reboot, and internet connection established, at around 760Kpbs; thought I'd best not reboot again.
Went out came back at 11.15, no DSL or /Net light  Tongue
Reboot, still no DSL.
eventually achieved internet at:
Downstream 21/4 11.15am

Current Rate (Kbps)
448 160
Max Rate (Kbps)
704 64
SNR Margin (dB)
9 9.5
Line Attenuation (dB)
31.5 55
Occupancy (%)
63 250
Errors (Pkts)
0 0
and DSL keeps falling over, recovers for  a time but no interweb.
I'm assuming something wrong at exchange.
Nothing showing recently on Exchange Checker.
Reboot (via s/ware) couplef times, as no DSL showing, then success.
Let's hope current stays, as this is within my usual range:
Upstream
Downstream

Current Rate (Kbps)
448 [color=blue]2656 (Weird)
[/color]
Max Rate (Kbps)
912 2688
SNR Margin (dB)
15 8
Line Attenuation (dB)
31.5 56.5
Occupancy (%)
49 98
Gel
Seasoned Pro
Posts: 1,475
Thanks: 150
Fixes: 12
Registered: 02-08-2007

Re: Never seen SNR this low

Router again showed internet this morning, though DSL light on.
2nd morning this has happened;
stats showing:
 Upstream Downstream
Current Rate (Kbps) 448 160
Max Rate (Kbps) 844 64
SNR Margin (dB) 13 24
Line Attenuation (dB) 31.5 54
Occupancy (%) 53 250
Errors (Pkts) 0 0
REBOOTING, achieve I/net :
 Upstream Downstream
Current Rate (Kbps) 448 2688
Max Rate (Kbps) 904 2720
SNR Margin (dB) 15 8.5
Line Attenuation (dB) 31.5 56.5
Occupancy (%) 49 98
Errors (Pkts) 0 0
Within 10 minutes, speed dropping:
  Upstream Downstream
Current Rate (Kbps) 448 1696
Max Rate (Kbps) 908 1664
SNR Margin (dB) 15 12
Line Attenuation (dB) 31.5 56.5
Occupancy (%) 49 101
Errors (Pkts) 0 0

Puzzling/ annoying. Cry
Plusnet Help Team
Plusnet Help Team
Posts: 4,956
Thanks: 419
Fixes: 152
Registered: 01-01-2012

Re: Never seen SNR this low

That looks like a fault to me.
I can see you've started the troubleshooter already so I'd recommend finishing it off so our Faults team can have a look.
If this post resolved your issue please click the 'This fixed my problem' button
 Matthew Wheeler
 Plusnet Help Team
Gel
Seasoned Pro
Posts: 1,475
Thanks: 150
Fixes: 12
Registered: 02-08-2007

Re: Never seen SNR this low

Matthew, thanks.
Doing diagnostic check on my TP Modem I see some fails, as below.
Anything obvious I should be doing after yet another reboot.
Can't send small e mails too currently, which I assume is all related.
TP Link Modem:
Test Internet surfing 
    Test xDSL Synchronization Pass
    ATM OAM Segment Ping Pass
    ATM OAM end to end Ping Pass
    Test PPP Server connection Pass
    Test authentication with ISP Pass
    Test the assigned IP address Pass
    Ping default gateway Fail
    Ping primary Domain Name Server Fail
    Test DNS Root Fail
    Network Connection Status Inspect(NCSI) Fail
Gel
Seasoned Pro
Posts: 1,475
Thanks: 150
Fixes: 12
Registered: 02-08-2007

Re: Never seen SNR this low

Tried old Netgear; are these latency figures giving any clues to my issue pse?
Many sites very slow to render, many fail to load at all.
Pinging default gateway shows 2ms, which I assume is OK?
BBC Am I right in thinking this is this bad, especially for UK sites?
Pinging www.bbc.net.uk [212.58.244.66] with 32 bytes of data:
Reply from 212.58.244.66: bytes=32 time=41ms TTL=54
Reply from 212.58.244.66: bytes=32 time=45ms TTL=54
Reply from 212.58.244.66: bytes=32 time=44ms TTL=54
Reply from 212.58.244.66: bytes=32 time=43ms TTL=54
Ping statistics for 212.58.244.66:
   Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
   Minimum = 41ms, Maximum = 45ms, Average = 43ms
Pinging www.google.co.uk [216.58.208.35] with 32 bytes of data:
Reply from 216.58.208.35: bytes=32 time=91ms TTL=56
Reply from 216.58.208.35: bytes=32 time=3757ms TTL=56
Reply from 216.58.208.35: bytes=32 time=1202ms TTL=56
Reply from 216.58.208.35: bytes=32 time=58ms TTL=56
Ping statistics for 216.58.208.35:
   Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
   Minimum = 58ms, Maximum = 3757ms, Average = 1277ms
Many US sites pinged just time out. Cry
Pinging vip-xnwp524d-525d.utc.com [159.82.147.19] with 32 bytes of data: (Actually pinged www.utc.com)
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 159.82.147.19:
   Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
& finally:

Pinging portal.plus.net [212.159.8.2] with 32 bytes of data:
Request timed out.
Reply from 212.159.8.2: bytes=32 time=1511ms TTL=247
Reply from 212.159.8.2: bytes=32 time=830ms TTL=247
Reply from 212.159.8.2: bytes=32 time=1290ms TTL=247
Ping statistics for 212.159.8.2:
   Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
   Minimum = 830ms, Maximum = 1511ms, Average = 1210ms
Tks
UPDATE 13.15
Getting worse if that's possible?
xxx J>ping www.bbc.co.uk
Ping request could not find host www.bbc.co.uk.
Please check the name and try again.
C:\Users\xxx J>ping www.bbc.co.uk
Pinging www.bbc.net.uk [212.58.246.92] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 212.58.246.92:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
Plusnet Staff
Plusnet Staff
Posts: 1,834
Thanks: 3
Registered: 24-07-2014

Re: Never seen SNR this low

I've just seen your latest update on the ticket.  Did you make any changes your side, because I don't see any changes we've made.
 Tony
 Plusnet Support
Gel
Seasoned Pro
Posts: 1,475
Thanks: 150
Fixes: 12
Registered: 02-08-2007

Re: Never seen SNR this low

I am tidying up my downstream cabling currently, as I have a feeling there's an intermittent fault
on one socket or device.
There'll be a few disconnections whilst this happens, & I know I'll be punished Embarrassed
dick:quote
Plusnet Staff
Plusnet Staff
Posts: 1,834
Thanks: 3
Registered: 24-07-2014

Re: Never seen SNR this low

Just make sure you log into the router and click to disconnect before powering any router/modem down.
 Tony
 Plusnet Support
Gel
Seasoned Pro
Posts: 1,475
Thanks: 150
Fixes: 12
Registered: 02-08-2007

Re: Never seen SNR this low

My ticket is progressing and Mark in Faults team ran another line check and advised though router showing 3200 in
Fact real speed was just 100 Crazy
He ascertained fault on my BT phone connection at exchange related to faulty battery connection...and I
Needed to report fault to BT.
Called 151 + their line check came back as No Fault Angry
They said PLUS Net needed to sort!
Eventually BT passed me to Broadband faults, presumably Openreach- their line test showed same result
As PLUS Net had.
They promise an exchange fix by May 1, when I can ask for reset to sort my lack of latency grief.
Gel
Seasoned Pro
Posts: 1,475
Thanks: 150
Fixes: 12
Registered: 02-08-2007

Re: Never seen SNR this low

As the problem on my Broadband service has been identified as fault at my BT Exchange, and effectively had no broadband since
Saturday with a fix promise of "by May 1", will + Net give me any credit and claim back on BT?
Plusnet Staff
Plusnet Staff
Posts: 1,834
Thanks: 3
Registered: 24-07-2014

Re: Never seen SNR this low

We often find faults when doing broadband tests that show on the PSTN side of the network. Generally speaking these will also show when we run a phone line test for customers.
However, you have to use the correct wording to BT. Don't tell them that your calling because your broadband is slow. Doing so will (quite rightly) have them revert you back to your ISP whoever that maybe. You need to ask them to run a line test. A battery contact should be easily found and raised for you by the telecom supplier. Alternatively, bring the phone to us, and we'll do all the testing for you.
 Tony
 Plusnet Support