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Anonymous
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M350 line is worse than my mobile!

Ok, before the logs a bit of history. Even during lockdown my download speed was pretty impressive for a M350 line, sitting at just under 380Mbs. However, since then the speed has depreciated dramatically with it now sitting at 50Mbs, if I am lucky. The time of the day seems pretty irrelevant. Last week VM’s website eventually admitted there were issues with the incoming line however their engineers fixed nothing. NOTE: This issue affected multiple areas in Edinburgh.

Over this period there has been no change in software or hardware at my end and the router (hub 3) has been reset a number of times (and also seemingly remotely by VM). I tried reporting this to the website but just keep hitting a brick wall of VM webpage errors. The connection has recently been so unreliable that for serious work I have to now use my mobile as a hotspot which gives me near-on 80Mbs.

Ok here are the logs….

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Anonymous
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Re: M350 line is worse than my mobile!

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

13310000003.740256 qam25
2267000000440256 qam17
32750000003.740256 qam18
42830000003.740256 qam19
52910000003.940256 qam20
62990000003.940256 qam21
73070000003.940256 qam22
8315000000440256 qam23
93230000003.740256 qam24
103390000003.540256 qam26
113470000003.540256 qam27
123550000003.540256 qam28
133630000003.540256 qam29
143710000003.540256 qam30
153790000003.540256 qam31
163870000003.540256 qam32
173950000003.540256 qam33
184030000003.540256 qam34
194110000003.440256 qam35
204190000003.440256 qam36
214270000003.540256 qam37
224350000003.740256 qam38
234430000003.740256 qam39
244510000003.740256 qam40

 

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Anonymous
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Re: M350 line is worse than my mobile!

Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1Locked40.9130
2Locked40.3210936
3Locked40.323898
4Locked40.916724
5Locked40.9540
6Locked40.3370
7Locked40.3110
8Locked40.9110
9Locked40.3100
10Locked40.3100
11Locked40.9130
12Locked40.9190
13Locked40.9170
14Locked40.3200
15Locked40.9190
16Locked40.9291336
17Locked40.3120
18Locked40.9110
19Locked40.360
20Locked40.9100
21Locked40.370
22Locked40.970
23Locked40.9230
24Locked40.340

 

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

12580000043.5512064 qam6
23260000044512064 qam5
33940000044.5512064 qam4
44620000046512064 qam3

 

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Anonymous
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Re: M350 line is worse than my mobile!

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0010
2ATDMA0000
3ATDMA0020
4ATDMA0000

 

Network Log

Time Priority Description

06/10/2021 09:12:6criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
06/10/2021 08:41:35Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
06/10/2021 00:06:51criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2021 22:51:31Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2021 20:06:54criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2021 20:01:9Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2021 20:01:9criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2021 09:44:39Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2021 06:44:6criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/10/2021 07:34:31Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/10/2021 03:51:52criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/10/2021 16:36:49Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/10/2021 14:54:12noticeDHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt062+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/10/2021 14:54:12ErrorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/10/2021 12:10:36Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/10/2021 06:20:53criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/10/2021 16:44:45Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/10/2021 11:13:2criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/10/2021 07:28:33Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/10/2021 23:44:47criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

 

Hope I got all  you need, thanks.

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Adduxi
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Re: M350 line is worse than my mobile!

Apart from a few noisy channels, (PostRS errors) not much to comment on.

I would setup a BQM here  www.thinkbroadband.com/ping

You say there was area works ongoing, do you know if this was ever finished?

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Andrew-G
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Alessandro Volta
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Re: M350 line is worse than my mobile!

I'm not so sure myself.  The very low pre-RS errors on most higher frequency channels indicate that the hub was recently rebooted, and that makes the high post-RS error count on D/S channel 16 look significant, and the clustering on ch 2, 3, and 4 isn't good either.  The network log's poor, with repeated channel loss, timeout or synch failures every single day.

A BQM should confirm that it's a poor connection, but on the basis of speeds, the downstream stats, and the log forum staff should get a technician booked unless there's a known area fault being worked on.  Hopefully we won't get the "all looks good from out side" comment, since it clearly isn't.

Anonymous
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Re: M350 line is worse than my mobile!


@Adduxi wrote:

I would setup a BQM here  www.thinkbroadband.com/ping

You say there was area works ongoing, do you know if this was ever finished?


Thanks, i'll check the link after lunch. As for the work being finished, the VM website has gone back to saying there are no broadband issues in my area. I ran the tests again and it finds problems, then it gives you the usual spraf about connections etc. then tells you to try again and again and again and that is as far as you get! It is like a dog chasing it's tail! 🙄

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Anonymous
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Re: M350 line is worse than my mobile!


@Andrew-G wrote:

the hub was recently rebooted,


Yeah this is the nature of the problem with the line, lose of connection and remote rebooting of the router. It isn't a constant issue, it randomely rears it head. It used to ALWAYS happen on a Sunday at about mid-day, give or take 15mins, but last week it was everyday at random times with Wednesday being the entire afternoon (hence why I had to use my mobile as a hotspot). Thursday the engineer was apparently fixing it, but although marginally better, the issue is still there.

I ran the tests again on this Monday and the VM website said they couldn't get the connection and to try again in 24 hours and if they issue was still there then they would send out an engineer. I ran the test on Tuesday and as I said in my previous post, the VM website would not offer the engineer option. Just a continual loop of reboot, check connections etc.

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Anonymous
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Re: M350 line is worse than my mobile!

Oh wait a minute now, I did another 'pin' reset and it is up from 50Mbs to 216Mbs... that's a bit more encouraging! 😀

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Andrew-G
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Message 10 of 14
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Re: M350 line is worse than my mobile!

Maybe.  More likely that the reset (which restarts the hub) resulted in re-negotiation of all 28 channels the hub uses, and you've got a better connection for the time being.  But the likelihood is that (unless an area fault has been found and fixed, which is possible) the connection will continue to have poor and erratic speeds.