T3 Timeouts and Erratic Power Levels

[neil3083]

Hey folks,

Internets been crap for the last few months (ever since summer kicked in)

Power levels are getting as high as 10-11Db DS / 38Db US and then randomly plummeting to -3Db DS / 51Db US.

Because of this I'm getting constant T3 timeouts and connection drops. I've checked every coupler/connector on the wire and everything's tight so I don't think that's the problem. The only thing I can think of is that the cables degraded over time as it's been installed since 2001 back on an old Telewest line.

Here my BQM:

https://www.thinkbroadband.com/broadband/monitoring/quality/share/54a0bb0e093fb381fb1d47e0f486b7fe86b640e6-15-07-2021

 Any advice would be greatly appreciated.

[neil3083]

Well the engineer came round yesterday and re-did a connector on the cable that was a little dodgy and also added a 4Db attenuator and a suppressor. He also switched the hub out for a new one.

This seem to work fantastic for the first few hours after he left but after midnight everything went downhill again.

https://www.thinkbroadband.com/broadband/monitoring/quality/share/391f535ba4c2ec2600978f5dc6b0ff158b...

Downstream bonded channels

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

1	331000000	6.6	40	256 qam	25
2	251000000	6	40	256 qam	15
3	259000000	6	40	256 qam	16
4	267000000	6	40	256 qam	17
5	275000000	6	40	256 qam	18
6	283000000	6	40	256 qam	19
7	291000000	6.3	40	256 qam	20
8	299000000	6.8	40	256 qam	21
9	307000000	6.4	40	256 qam	22
10	315000000	6.5	40	256 qam	23
11	323000000	6.8	40	256 qam	24
12	339000000	6.9	40	256 qam	26
13	347000000	7	40	256 qam	27
14	355000000	7	40	256 qam	28
15	363000000	7	40	256 qam	29
16	371000000	7.1	40	256 qam	30
17	379000000	7.1	40	256 qam	31
18	387000000	7	40	256 qam	32
19	395000000	7	40	256 qam	33
20	403000000	6.8	40	256 qam	34
21	411000000	6.8	40	256 qam	35
22	419000000	6.4	40	256 qam	36
23	427000000	6.4	40	256 qam	37
24	435000000	6.3	40	256 qam	38

Downstream bonded channels

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

1	Locked	40.3	111	211
2	Locked	40.9	69	124
3	Locked	40.3	56	101
4	Locked	40.3	50	138
5	Locked	40.3	47	123
6	Locked	40.9	71	98
7	Locked	40.9	42	136
8	Locked	40.3	67	203
9	Locked	40.3	84	200
10	Locked	40.3	93	142
11	Locked	40.3	103	187
12	Locked	40.9	101	167
13	Locked	40.3	78	252
14	Locked	40.3	72	146
15	Locked	40.3	62	195
16	Locked	40.3	65	171
17	Locked	40.9	71	106
18	Locked	40.9	53	122
19	Locked	40.3	64	53
20	Locked	40.3	60	106
21	Locked	40.3	69	45
22	Locked	40.3	59	46
23	Locked	40.3	54	28
24	Locked	40.3	48	38

[neil3083]

Upstream bonded channels

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

1	60300017	44	5120	64 qam	1
2	39400036	42.5	5120	64 qam	4
3	46200007	43.5	5120	64 qam	3
4	53700004	43.5	5120	64 qam	2

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	1	0
2	ATDMA	0	0	16	0
3	ATDMA	0	0	1	0
4	ATDMA	0	0	1	0

Network Log

Time Priority Description

18/07/2021 19:05:24	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/07/2021 19:05:24	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/07/2021 19:05:6	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/07/2021 15:38:26	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/07/2021 14:24:31	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/07/2021 13:27:35	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/07/2021 13:27:5	Warning!	LAN login FAILED : Incorrect Username / Password / ConnectionType;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/07/2021 06:02:54	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/07/2021 05:45:3	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:42	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:34:9	notice	NOTICE ATOM is restarted as part of Self Healing Mechanism;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:31:9	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:31:9	critical	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:30:29	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:30:29	critical	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:29:49	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:29:49	critical	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:29:10	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:29:9	critical	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/07/2021 23:28:30	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[conman33158]

Your power levels are fine but still too many Post RS Errors and T3 Timeouts mate. You will need to get back on to them, it seems something is still not right 😞

[Gareth_L]

Hello neil3083

Sorry to hear this is still happening 

Something doesn't seem quite right at all

I am more than happy to take a look at this for you 
I will need to send you a private message to pass security 
If you can check the purple envelope top right of your screen that would be great 
Regards     
Gareth_L

[Gareth_L]

Hey neil3083

Thanks for those details 

Can you please let us know how the visit goes 

Gareth_L

[Gareth_L]

Hi neil3083

Quick question

How did todays Technician visit go?

Gareth_L

[neil3083]

Hi,

The engineers where fantastic, they've inspected all the cable and replaced some extremely old connections, changed my position on the cabinet and rebalanced the power levels. So far it's looking good and I've not had any T3 timeouts so far.

I'll keep an eye on it for the next few days and report back if there's any problems

Many thanks for arranging everything.

[Gareth_L]

That's the best news of day neil3083

So happy it's been looked at and fixed for you 

Have a good rest of the day 

Gareth_L