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Low downstream and high upstream - I guess I need to take time off work for a visit ?

TimTheVanMan
Joining in

Our hub 3 has been struggling even morethan usual today, with several occasions where it dropped connection and then strugggled with a cycle of green flashing lights before I power cycled it. From what I can see the downstream levels are all low (too negative) and with only one upstream channel with high power and 16 qam theres something wrong in cabling terms ? I'm not sure I can face the hassle of the telephone obstacle course, and even if I do I'm not sure I can arrange to be at home when the option comes up for an engineer visit ! 

 

Downstream

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

1323000000-6.737256 qam24
2203000000-8.536256 qam9
3211000000-8.736256 qam10
4219000000-9.235256 qam11
5227000000-9.735256 qam12
6235000000-9.935256 qam13
7243000000-10.735256 qam14
8251000000-11.235256 qam15
9259000000-936256 qam16
10267000000-8.236256 qam17
11275000000-8.237256 qam18
12283000000-7.937256 qam19
13291000000-7.737256 qam20
14299000000-7.436256 qam21
15307000000-7.237256 qam22
16315000000-737256 qam23
17331000000-6.237256 qam25
18339000000-5.937256 qam26
19347000000-5.737256 qam27
20355000000-6.237256 qam28
21363000000-7.937256 qam29
22371000000-8.237256 qam30
23379000000-8.237256 qam31
24387000000-8.737256 qam32

Downstream bonded channels

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

1Locked37.333189
2Locked36.628197
3Locked36.343138
4Locked35.783149
5Locked35.5410135
6Locked35.5382143
7Locked35.7128150
8Locked35.7139147
9Locked36.32959
10Locked36.611140
11Locked37.628183
12Locked37.319143
13Locked37.325156
14Locked36.329134
15Locked37.630139
16Locked37.328146
17Locked37.69142
18Locked37.612198
19Locked37.611147
20Locked37.624136
21Locked37.321144
22Locked37.626198
23Locked37.332153
24Locked37.317145

Upstream bonded channels

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

14309992256.5512016 qam2



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000

Network Log

Time Priority Description

25/02/2024 15:12:11notice

LAN login Success;

25/02/2024 15:12:7Warning!

LAN login FAILED : Incorrect Username / Password / ConnectionType;

25/02/2024 15:08:0Warning!RCS Partial Service;CM--VER=3.0;
25/02/2024 15:08:0criticalSYNC Timing Synchronization failure - Loss of Sync;
25/02/2024 15:03:36criticalReceived Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;
25/02/2024 15:02:45criticalNo Ranging Response received - T3 time-out;
25/02/2024 15:02:16criticalREG RSP not received;
25/02/2024 15:02:16ErrorT6 Timeout and retries exceeded;
01/01/1970 00:02:31Warning!ToD request sent - No Response received;
01/01/1970 00:01:43criticalNo Ranging Response received - T3 time-out;
25/02/2024 14:58:47Warning!RCS Partial Service;
25/02/2024 14:58:45Warning!Lost MDD Timeout;
25/02/2024 14:58:45Warning!RCS Partial Service;
25/02/2024 14:58:44Warning!Lost MDD Timeout;
25/02/2024 14:58:37Warning!RCS Partial Service;
25/02/2024 14:58:36Warning!Lost MDD Timeout;
25/02/2024 14:58:36Warning!RCS Partial Service;
25/02/2024 14:58:35ErrorService Change Response rejected - Invalid transaction ID;
25/02/2024 14:58:35Warning!RCS Partial Service;
25/02/2024 14:58:34Warning!Lost MDD Timeout;

 

8 REPLIES 8

Steven_L
Forum Team
Forum Team

Hey TimTheVanMan,

Welcome to the community and thanks for taking the time to post here on the forums. I’m sorry to hear of the issues that you’re having with your connection at the moment, I can see that you have been able to speak to the team and get a technician visit booked in. Please let us know how the visit goes, if you get the chance that is 👍

Kind Regards,

Steven_L

TimTheVanMan
Joining in

A really helpful and knowledgable technician has just fixed our connection !

The issue was with the isolator in the wall socket. Signals were good before that and bad after. A previous fix some years ago had left us with a 10dB attenuator, and he took that away too.

We now have downstream levels at 0-5 dBmV and 5 upstream at 46 dBmV. The upstream channels are only at 16qam.

I havent run a speed test for quite some time, but right now I'm seeing 36 down and 25 up on ookla. Given that the virgin package we pay for shows 250, that seems pretty poor ? 

Client62
Alessandro Volta

The Upstream should be 64 QAM with between 4 and 6 channels connected.
Try 0800 561 0061 to see if there is a known noise fault in your street.  
There may be more to fix.

Use this test to see the service speed to the Hub and from the Hub to your devices.
https://www.samknows.com/realspeed/
Once the test begins click on: Run full test to see all the stats.

Hi TomTheVanMan, 

Thanks for taking the time to update us via the Community. 

We're happy to hear the engineer was able to get some things sorted for you but I'm sorry to hear that issues have continued. 

Taking a look at things this end, the hub is showing all good. All power & signal levels are optimal. Your downstream and upstream are connecting correctly too. There is nothing in the area affecting either. 

Can you please ensure you're you're running the speed test through SamKnows and also ensure you're connected via an ethernet cable to get a true reflection of the speed. 

Pop a screenshot of your results here so we can help advise further. 

Thanks, 

Kath_P
Forum Team

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I think we've just about had enough now. The hub pretty much needs a hard reboot / power cycle every day to correct 'no internet' to our devices. All the router stats show absolutely fine, but with jncreasing frequency we cannot connect to the Web. The TV signal connection is generally fine, although we've had issues with streaming services.

The hub is in modem mode, as the original WiFi was poor and configuring even a couple of simple rules for port forwarding was a frustrating process. However, even the router tells me there's no internet connection available. Are there any tools that will he'll diagnose ? I know I can probably just hard reboot and sort it, but I'm fed up with that now.

Also, just to rub salt, the last speed check I tried showed 10Mbs download, compared to  paid for 250. I had a sales call yesterday and they tried to sell be a 1Gig upgrade for additional cost, and told me that using 5 or 6 devices was the reason its slow at the moment! 

I'm using 4G on my phone to post this, as yet again the hub says everything is fine, but no devices will  connect.

Hi @TimTheVanMan thanks for your reply here, sorry this is still ongoing for you.

So we've ran checks and all levels are within the correct specifications, we're unable to see any disruption on the line that could be causing any issues.

Have you tried a wired connection with any suitable devices to see if this helps?

Many thanks

Tom_W

Thanks for your suggestions. The hub is in wifi mode, with a netgear router attached. When we have this issue the router indicates no internet connection too  so I don't think it's related to the wire. I will replace the cat 5 cable though, just in case !

I'm not surprised that the hub is indicating everyrhjngjis fine, when we have this issue I can almost always connect to the hub and see the network status is OK, and there are no worrying error messages.

The v6 TV box is pretty stable for TV, but when other devices indicate no internet it cannot allow access to streaming services such as iplayer.

It's frustrating, as a power cycle on the hub almost always fixes it, but a soft reboot doesn't. That means we power cycle our hub at least once a week. Maybe I should just pop in a hardware timer that power cycles it every few hours to get around this.

Hi @TimTheVanMan,

As we can't offer full diagnostics via a third party router/equipment, we would suggest performing the test and troubleshooting that we've suggested in our earlier posts directly via our router.

Let us know how you get on.

Thanks,

 


Zach - Forum Team
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