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High Uncorrectable errors (Active Profile) /High post RS errors

mcraig31
Joining in

on ‎06-08-2024 11:55

Been having issues the past month or so where my internet speeds are dying down to 2-5mbps on a 1gig connection where as normally I would be seeing 1.2gbps .

Upstream has no errors but downstream is horrendous.
Below is a copy pasta just after restarting the router which temporally fixes things for a bit.

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1331000000-16.134QAM 25625
2139000000-9.938QAM 2561
3147000000-10.638QAM 2562
4155000000-1138QAM 2563
5163000000-11.837QAM 2564
6171000000-12.237QAM 2565
7179000000-12.837QAM 2566
8187000000-1337QAM 2567
9195000000-13.436QAM 2568
10203000000-13.736QAM 2569
11211000000-1436QAM 25610
12219000000-14.236QAM 25611
13227000000-14.635QAM 25612
14235000000-14.835QAM 25613
15243000000-1535QAM 25614
16251000000-15.235QAM 25615
17259000000-15.334QAM 25616
18267000000-15.434QAM 25617
19275000000-15.534QAM 25618
20283000000-15.434QAM 25619
21291000000-1534QAM 25620
22299000000-14.834QAM 25621
23307000000-14.535QAM 25622
24315000000-14.935QAM 25623
25323000000-15.534QAM 25624
26339000000-16.334QAM 25626
27347000000-16.734QAM 25627
28355000000-17.233QAM 25628
29363000000-17.633QAM 25629
30371000000-1832QAM 25630
31379000000-18.432QAM 25631
32387000000-18.532QAM 25632

3.0 Downstream channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked34387930
2Locked3830
3Locked38120
4Locked3850
5Locked3760
6Locked3750
7Locked3720
8Locked3780
9Locked3630
10Locked36100
11Locked3670
12Locked3690
13Locked35330
14Locked3520897088729
15Locked35224473594
16Locked351086620
17Locked3414060680
18Locked3453999900
19Locked34980048339
20Locked3415413178626547
21Locked3412343665110666
22Locked3433074980
23Locked356929170
24Locked353261200
25Locked341118020
26Locked34329910
27Locked34533340
28Locked331217110
29Locked333332610
30Locked325640020
31Locked328544710
32Locked328177520

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)
159Locked32-18.7611862235604527

Network Log

Time Priority Description
06-08-2024 11:48:14noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 11:44:17noticeGUI Login Status - Login Success from LAN interface
06-08-2024 11:09:10noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:56:21noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:55:58noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:55:58warningDBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:55:54noticeREGISTRATION COMPLETE - Waiting for Operational status
06-08-2024 10:55:49warningREG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:55:44noticeDS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:55:43noticeTLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:55:36warningDHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:55:34noticeHonoring MDD; IP provisioning mode = IPv4
06-08-2024 10:55:23criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:55:19criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
06-08-2024 10:55:18criticalCable Modem Reboot because of - HW or Power-On Reset
02-08-2024 21:40:27criticalUnicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-08-2024 21:40:27critical16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-08-2024 21:38:08criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:31:23criticalCable Modem Reboot because of - HW or Power-On Reset
28-07-2024 17:31:23criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:13:49criticalReceived 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;
28-07-2024 17:13:03criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:13:02criticalReceived 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;
28-07-2024 17:12:17criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:11:54criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:10:47criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:10:45criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:10:24criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:10:23criticalReceived 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;
28-07-2024 17:10:04criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:10:03criticalReceived 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;
28-07-2024 17:09:10criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
28-07-2024 17:09:04criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
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5 REPLIES 5

Client62
Alessandro Volta

on ‎06-08-2024 12:49

The signal level is so below normal, start by checking for a known fault in your street :

Call 0800 561 0061 – this is an automated number.
https://www.virginmedia.com/help/check/status/identification/identify

Failing this, contact VM and book an engineer visit to correct the signal levels.

VM Customer Services are on 150 or 0345 454 1111 from a non-VM phone.

Downstream Power levels are supposed to be from -7 to +7 with a max of +10 dBmV

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1331000000-16.134QAM 25625
2139000000-9.938QAM 2561
3147000000-10.638QAM 2562
4155000000-1138QAM 2563
5163000000-11.837QAM 2564
6171000000-12.237QAM 2565
7179000000-12.837QAM 2566
8187000000-1337QAM 2567
9195000000-13.436QAM 2568
10203000000-13.736QAM 2569

 

3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
159Locked32-18.7611862235604527
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Gareth_L
Forum Team
Forum Team

on ‎08-08-2024 13:33

Hello mcraig31

Thanks for popping back on our community, sorry you've had to though for help with your download speeds.

We do have the ability to run a few checks on equipment from here, after checking the upstream and downstream levels we can see you have an engineer booked to attend.

Would you be able to keep us posted how the visit goes and how the speeds are after this visit.

We're only a message away if you need anything else at all?

Gareth_L

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Sephiroth
Alessandro Volta

on ‎08-08-2024 14:13

While you're waiting, do check that all coax cables are tight, both in the home (both ends) and in the VM brown box outside.  Then let us know.  It might be a quick fix.

Seph - ( DEFROCKED - My advice is at your risk)

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mcraig31
Joining in

4 weeks ago

update - engineer came out, turns out the attenuators on the cable ends were way over powered an causing issues. He quickly swapped them out and removed the splitter that was left by the previous residents. A++ on the guy who came out, great chat, very friendly, very approachable, all round good guy and very knowledgeable. I wish we could give these people a commendation somewhere or let virgin know. 

Matthew_ML
Forum Team
Forum Team
In response to mcraig31

3 weeks ago

Glad to hear this has been a successful trip.

If you need anything in the future you know where we are.

Enjoy your weekend 🙂 

Matt - Forum Team


New around here?

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