t3 timeouts

[RockerSBM]

Hi

Can anyone tell me why t3 pop up on they upstream bit but dont show up on the error logs? im getting more t3 on the upstream bit but they dont show on the error logs when another shows up!

[RockerSBM]

Hi 

so the noise on the 3.1 ok?

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

25	331000000	4.300003	38.605377	QAM256	25
1	139000000	5.800003	38.605377	QAM256	1
2	147000000	5.800003	38.605377	QAM256	2
3	155000000	6.000000	38.605377	QAM256	3
4	163000000	5.900002	38.605377	QAM256	4
5	171000000	5.599998	38.605377	QAM256	5
6	179000000	5.099998	38.605377	QAM256	6
7	187000000	4.900002	38.605377	QAM256	7
8	195000000	4.800003	38.605377	QAM256	8
9	203000000	4.800003	38.983261	QAM256	9
10	211000000	4.699997	38.983261	QAM256	10
11	219000000	4.500000	38.605377	QAM256	11
12	227000000	4.199997	38.605377	QAM256	12
13	235000000	4.099998	38.605377	QAM256	13
14	243000000	4.099998	38.983261	QAM256	14
15	251000000	3.799999	38.605377	QAM256	15
16	259000000	4.000000	38.605377	QAM256	16
17	267000000	4.000000	38.983261	QAM256	17
18	275000000	3.700001	38.605377	QAM256	18
19	283000000	3.500000	38.983261	QAM256	19
20	291000000	4.099998	38.605377	QAM256	20
21	299000000	4.800003	38.983261	QAM256	21
22	307000000	5.199997	38.983261	QAM256	22
23	315000000	5.000000	38.983261	QAM256	23
24	323000000	4.400002	38.983261	QAM256	24
26	339000000	4.500000	38.605377	QAM256	26
27	347000000	4.699997	38.605377	QAM256	27
28	355000000	5.000000	38.605377	QAM256	28
29	363000000	5.000000	38.983261	QAM256	29
30	371000000	4.599998	38.605377	QAM256	30
31	379000000	4.300003	38.605377	QAM256	31

3.0 Downstream channels

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

25	Locked	38.605377	0	0
1	Locked	38.605377	0	0
2	Locked	38.605377	0	0
3	Locked	38.605377	0	0
4	Locked	38.605377	0	0
5	Locked	38.605377	0	0
6	Locked	38.605377	0	0
7	Locked	38.605377	0	0
8	Locked	38.605377	0	0
9	Locked	38.983261	0	0
10	Locked	38.983261	0	0
11	Locked	38.605377	0	0
12	Locked	38.605377	0	0
13	Locked	38.605377	0	0
14	Locked	38.983261	0	0
15	Locked	38.605377	0	0
16	Locked	38.605377	0	0
17	Locked	38.983261	0	0
18	Locked	38.605377	0	0
19	Locked	38.983261	0	0
20	Locked	38.605377	0	0
21	Locked	38.983261	0	0
22	Locked	38.983261	0	0
23	Locked	38.983261	0	0
24	Locked	38.983261	0	0
26	Locked	38.605377	0	0
27	Locked	38.605377	0	0
28	Locked	38.605377	0	0
29	Locked	38.983261	0	0
30	Locked	38.605377	0	0
31	Locked	38.605377	0	0

3.1 Downstream channels

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

159

96

4K

1880

QAM4096

392

3.1 Downstream channels

Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

159

Locked

42

3.6

1633915370

1061

and everyone on tbb getting this same graph?

[Vikki_M]

Hi @RockerSBM

Thank you for your further post.

I have taken a look at things from our side and we can't locate any issues at all with the broadband service.

Are you having any service issues at the moment?

Please pop back to us when you can. 

[RockerSBM]

Hi 

yes you wont see anything because its noise on the 3.1 channels which networks need to find out why its getting noise and where its coming from.

also can you check at times of this graph why everything going big and loads of packet loss at the top?

[jem101]

@RockerSBM 

You and everyone else in the country on VM;

https://community.virginmedia.com/t5/Networking-and-WiFi/VM-CORE-NETWORK-FAILURE-URGANT/td-p/4986440 

[gitty]

There are many variables to consider when looking at the OFDM channel. The webinterface only exposes a few of them. From what we can tell from your numbers and from your log, the noise level is acceptable.

Another thing about the OFDM channel is how it changes modulation profile on the fly. It means that the uncorrectable codeword number can be huge without you being affected by it. It keeps counting bad codewords on the 4096-QAM profile while you are using the 2048-QAM profile (which is fine). That means you won't get packet loss, because your traffic is not carried by those bad codewords.

[RockerSBM]

Hi Gitty

still to still apply when when qam goes to 1024 too?