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Consistent intermittent dropouts for the past year

unazed
Joining in

An engineer came out to replace the router around a week ago, yet nothing has changed. I've replaced the coaxial cable since it seemed a little decrepit, again to no avail. I've looked at the router's upstream/downstream stats and they all seem to be within spec. of what I've seen from others' routers, besides the pre/post-RSS error count.

I'm genuinely just baffled at how/what/why the signal is so appalling. Whenever the internet does work I get around 300/10 Mbps. I'm not sure if it's placebo or what, but whenever I seem to do anything that could bring me happiness the Internet shuts down for about 5 minutes, if that helps.

unazed_0-1717190835329.png

(10-12pm is a power outage)

 

31-05-2024 20:51:57criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
31-05-2024 20:51:26criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
31-05-2024 20:50:57criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
31-05-2024 20:50:37criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
31-05-2024 20:20:16criticalReceived Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
31-05-2024 20:17:00criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
13310000005.641QAM 25625
21390000003.640QAM 2561
31470000003.840QAM 2562
41550000003.840QAM 2563
51630000003.740QAM 2564
61710000003.640QAM 2565
71790000003.740QAM 2566
81870000004.240QAM 2567
91950000004.640QAM 2568
102030000004.740QAM 2569
112110000004.741QAM 25610
122190000004.540QAM 25611
132270000004.240QAM 25612
142350000004.240QAM 25613
152430000004.341QAM 25614
162510000004.141QAM 25615
17259000000440QAM 25616
182670000004.240QAM 25617
192750000004.541QAM 25618
202830000004.741QAM 25619
212910000004.941QAM 25620
222990000005.241QAM 25621
233070000005.541QAM 25622
243150000005.841QAM 25623
253230000005.941QAM 25624
263390000005.641QAM 25626
273470000005.841QAM 25627
283550000005.941QAM 25628
293630000006.141QAM 25629
303710000006.141QAM 25630
31379000000641QAM 25631
323870000005.741QAM 25632

3.0 Downstream channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked416161177
2Locked40500225
3Locked40615307
4Locked405861763
5Locked405711511
6Locked405081020
7Locked40133255
8Locked405411475
9Locked40248636
10Locked40240
11Locked41162523
12Locked40108192
13Locked40466741
14Locked40145509
15Locked41127390
16Locked416011210
17Locked40189567
18Locked4092179
19Locked41556778
20Locked41558730
21Locked41112310
22Locked415471032
23Locked41180480
24Locked411738
25Locked412087
26Locked411044
27Locked411243
28Locked412555
29Locked4193155
30Locked4178175
31Locked4190147
32Locked4176166

3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159944K1840QAM 40961108

3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
159Locked436.568562343228

3.0 Upstream channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
049600000475120QAM 641
14310000047.35120QAM 642
23660000047.35120QAM 643
33010000046.85120QAM 644
42360000046.85120QAM 645

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
0ATDMA00420
1ATDMA0050
2ATDMA0050
3ATDMA0060
4ATDMA0060

3.1 Upstream channels

Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
61041.52KQAM 256

3.1 Upstream channels

Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
6OFDMA2007400000020
4 REPLIES 4

jbrennand
Very Insightful Person
Very Insightful Person

You replaced the co-ax cable! - with what ?

If you got some "VM compatible" cable from Amazon or similar - then my money is on that bit of tat cable being the main culprit - VM cable is different spec and no 3d party can supply it.  Many examples on here (and in my daughters bedroom) whereby Amazon tat cables introduce "noise" into the whole system - which can also then affect your neighbours connections.

Put the cable that the Tech left with you back on - and see if it clears up after doing this...

...  Switch the Hub off and unplug it from the mains supply for five minutes. Whilst it's off, do a quick check that all of your coax and ethernet cable connections are in nice and "finger" tight - at the Hub and wall box and also at any connectors etc. Ensure there are no “unterminated cable loose ends. Disconnect all the connections and reconnect to be sure. Also check that the internal wiring is ok with no kinking or chaffing. When its light, check that all looks good with the outside cabling and wall box (no “staples, etc.,) piercing the cables. Then switch the Hub back on and leave ~5 minutes When all done, check back in the settings and ensure that the RS error counts and T3 errors have all reset to 0. Then check every hour or so to see if they start reappearing - they shouldn't. If they do (particularly the postRS and T3 ones) you have a problem (noise) that only a Tech visit will sort.
Also check the Upstream QAM’s are all at 64


--------------------
John
--------------------

I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 2 on WiFi) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's & TP-Link Archer C64 WAP. On Volt 350Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.

jbrennand
Very Insightful Person
Very Insightful Person

Has it improved with the old coax back on ?


--------------------
John
--------------------

I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 2 on WiFi) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's & TP-Link Archer C64 WAP. On Volt 350Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.

Been monitoring it for 24h now with the old co-ax back on. It has been pretty much the same.

unazed_1-1717417344291.png

6pm is when I changed the cable, I didn't record any up/downstream stats, but as of now:

 

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
13310000005.641QAM 25625
21390000003.940QAM 2561
31470000004.140QAM 2562
4155000000440QAM 2563
51630000003.840QAM 2564
6171000000440QAM 2565
71790000004.240QAM 2566
81870000004.540QAM 2567
91950000004.840QAM 2568
102030000004.840QAM 2569
11211000000541QAM 25610
122190000004.941QAM 25611
132270000004.641QAM 25612
142350000004.440QAM 25613
152430000004.341QAM 25614
162510000004.241QAM 25615
172590000004.241QAM 25616
182670000004.541QAM 25617
192750000004.741QAM 25618
20283000000541QAM 25619
212910000005.341QAM 25620
222990000005.741QAM 25621
233070000005.841QAM 25622
243150000005.741QAM 25623
253230000005.641QAM 25624
26339000000641QAM 25626
273470000006.341QAM 25627
283550000006.241QAM 25628
29363000000641QAM 25629
303710000005.841QAM 25630
313790000005.841QAM 25631
323870000005.841QAM 25632

3.0 Downstream channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked41426910526
2Locked401905492
3Locked4010844936778
4Locked404638012215
5Locked401868911471
6Locked4014671932933
7Locked408787751906
8Locked40295928605
9Locked4033966169
10Locked403371033
11Locked41673811822
12Locked4136027849
13Locked4126555807
14Locked4031446856
15Locked4131096924
16Locked4136387087
17Locked4121534932
18Locked4133287792
19Locked4112203776
20Locked411072813621
21Locked4113682663
22Locked4120064790
23Locked4118023419
24Locked4122075156
25Locked4123236386
26Locked4130175594
27Locked41946311960
28Locked4137387747
29Locked4139089591
30Locked4129184760
31Locked4152017091
32Locked4126263652

3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159944K1840QAM 40961108

3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
159Locked436.3179672194

17929

3.0 Upstream channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
04960000047.55120QAM 641
14310000047.55120QAM 642
236600000475120QAM 643
33010000046.55120QAM 644
42360000046.55120QAM 645

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
0ATDMA043171
1ATDMA043190
2ATDMA043181
3ATDMA043194
4ATDMA043312

3.1 Upstream channels

Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
61041.52KQAM 256

3.1 Upstream channels

Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
6OFDMA2007400000000

Hi @unazed,

Thank you for your posts and welcome to our community forums. We're here to help. 

I'm very sorry to hear of your recent connection issues. Are these ongoing today? If so, would you mind expanding on the situation, specifically with the different coax cables you've mentioned? Are you saying you've installed some coax cables yourself?

Thanks,
 


Zach - Forum Team
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