Bonded downstream channels

[glenvee]

I have an appointment for a tech from TWC to come to the house Tuesday morning.  Deja vu, the same thing as the last time.  Maybe this one will understand what the modem logs and signals mean.  :-\

[glenvee]

The modem dropped downstream channel 11 yesterday, this morning it picked it up again  Look at the high uncorrectables on channel 11!

Downstream Bonding Channel Value

Channel ID	1	2	3	5	7	8	11
Frequency	555000000 Hz	561000000 Hz	567000000 Hz	579000000 Hz	591000000 Hz	597000000 Hz	615000000 Hz
Signal to Noise Ratio	38 dB	36 dB	38 dB	37 dB	38 dB	39 dB	38 dB
Downstream Modulation	QAM256	QAM256	QAM256	QAM256	QAM256	QAM256	QAM256
Power Level The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading	0 dBmV	0 dBmV	0 dBmV	0 dBmV	1 dBmV	1 dBmV	0 dBmV

Upstream Bonding Channel Value

Channel ID	4	2	3	1
Frequency	37000000 Hz	24200000 Hz	30600000 Hz	19400000 Hz
Ranging Service ID	3326	3326	3326	3326
Symbol Rate	2.560 Msym/sec	5.120 Msym/sec	5.120 Msym/sec	2.560 Msym/sec
Power Level	44 dBmV	42 dBmV	42 dBmV	41 dBmV
Upstream Modulation	[3] QPSK [3] 16QAM	[3] QPSK [1] 16QAM [2] 64QAM	[3] QPSK [1] 16QAM [2] 64QAM	[3] QPSK [2] 16QAM
Ranging Status	Success	Success	Success	Success

Signal Stats (Codewords)Bonding Channel Value

Channel ID	1	2	3	5	7	8	11
Total Unerrored Codewords	7994445243	7993479807	7638409341	7518850238	7499336909	5552324798	3168168329
Total Correctable Codewords	22	12	54	77	131	76	70
Total Uncorrectable Codewords	535	1399	2631	5206	6497	86398	188778

[MsRaye]

11 is really bad this is def ingress...

broadcast TV ch 38..

[glenvee]

It got bad after that, at 4:45 I had to reboot the modem because it switched channels again, and suddenly my formerly 50 Mbps download speed turned into only 0.50 Mbps, according to speedtest.net

I just heard from the original TWC tech who I had called, he was on vacation!  He's thinking of bringing a test modem to see what it does.  Still trying to convince him of the ingress.

I did the power reset shown here, after the issues just prior to it in the log, which led to the total loss of speed.

ul 09 2016 15:48:20	6-Notice	I401.0	TLV-11 - unrecognized OID;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jul 09 2016 15:48:20	5-Warning	Z00.0	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:15	6-Notice	N/A	Cable Modem Reboot due to power reset ;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jul 09 2016 15:10:45	5-Warning	T202.0	Lost MDD Timeout;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jul 09 2016 15:10:45	5-Warning	N/A	DS Partial Service Fallback: MDD Lost-> CM in DOCSIS 3.0 Recovery Mode ;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jul 09 2016 15:10:22	6-Notice	N/A	MDD Recovery following MDD Loss;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jul 08 2016 22:02:45	5-Warning	T202.0	Lost MDD Timeout;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jul 08 2016 22:02:45	5-Warning	N/A	DS Partial Service Fallback: MDD Lost-> CM in DOCSIS 3.0 Recovery Mode ;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jul 08 2016 16:27:39	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jul 08 2016 07:25:57	5-Warning	T202.0	Lost MDD Timeout;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;
Jul 08 2016 07:25:57	5-Warning	N/A	DS Partial Service Fallback: MDD Lost-> CM in DOCSIS 3.0 Recovery Mode ;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;

[MsRaye]

Downstream partial service is caused by a broken shield connection somewhere...Broadcast TV is getting in intermittently

A 16 channel modem stays on the bad channels but has awfull error counts on them whereas yours is trying to find good ones. This is probably a job for the bucket truck guys unless this tech can drive from your modem back to the HFC fiber converter and look for a serious egress point which is probably where the Ingress is getting in.

[glenvee]

The tech came out Sunday, hooked up one of his test modems up on the pole by my house, and said he was getting erratic speeds, whereas the same modem was rock stable back at his office, so he contacted the maintenance bucket crew to find where the bad connections were.  They were out on the pole at midnight Sunday, at the same time i experienced a big slowdown.  He called today and said they detected issues on a couple of my neighbors lines and had to follow up to get into their homes to see what was going on there. 
The tech thinks that in addition to that, i may have a problem with my modem or its power supply, although nothing in my logs has indicated an issue with the power supply, that I can see. 

He gave me one of his test modems to try for a few days, which apparently is provisioned for him, and allows much faster up and download speeds than I pay for.... so instead of my 50 Mbps down and 5 up on speedtest.net, when I hooked it up last night, it was getting about 89 Mbps down and 20 up.  It's got 16 downstream channels, and is an Arris Touchstone SB 6183.  The logs haven't shown anything since the initial hookup last night.  The Status page so far always shows 0 uncorrectables, which makes me wonder if it uses a different baseline than my SB6141.  Anyway, i can't help feeling his modem being provisioned for him as a tech at a higher speed and 16 channels, may not be the best test for whether my modem is bad.  it feels like comparing apples to oranges, though the tech seems to feel otherwise.

This evening, speedtest was showing very erratic download speeds with his modem, ranging anywhere from 80 Mbps down to 25 Mbps down, as I tried it connecting to different servers.  I think that's the erratic issue he saw, that may be due to the leakage from bad connections at neighbors on my node.

Anyway, I'll update when I find out if they fix anything there.  Still have to determine if it's just that, or if there's also an issue with my modem or PSU..... and how to test that.

Here's the Status page from the loaner SB6183:

Status

The statuses listed show the connection state of the cable modem. They are used by your service provider to evaluate the operation of the cable modem.

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel		Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Configuration File	OK
Security	Enabled	BPI+
DOCSIS Network Access Enabled	Allowed

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Corrected	Uncorrectables
1	Locked	QAM256	4	573000000 Hz	-1.2 dBmV	40.0 dB	0	0
2	Locked	QAM256	2	561000000 Hz	-1.3 dBmV	40.0 dB	0	0
3	Locked	QAM256	3	567000000 Hz	-1.2 dBmV	40.1 dB	1	0
4	Locked	QAM256	1	555000000 Hz	-1.5 dBmV	40.0 dB	4	0
5	Locked	QAM256	5	579000000 Hz	-1.2 dBmV	39.8 dB	3	0
6	Locked	QAM256	6	585000000 Hz	-0.8 dBmV	39.9 dB	1	0
7	Locked	QAM256	7	591000000 Hz	-0.5 dBmV	40.1 dB	2	0
8	Locked	QAM256	8	597000000 Hz	-0.1 dBmV	40.3 dB	4	0
9	Locked	QAM256	9	603000000 Hz	-0.1 dBmV	40.3 dB	1	0
10	Locked	QAM256	10	609000000 Hz	-0.4 dBmV	40.2 dB	3	0
11	Locked	QAM256	11	615000000 Hz	-0.7 dBmV	40.0 dB	3	0
12	Locked	QAM256	12	621000000 Hz	-0.9 dBmV	39.9 dB	2	0
13	Locked	QAM256	13	627000000 Hz	-0.8 dBmV	39.9 dB	0	0
14	Locked	QAM256	14	633000000 Hz	-0.5 dBmV	40.1 dB	2	0
15	Locked	QAM256	15	639000000 Hz	-0.5 dBmV	40.0 dB	0	0
16	Locked	QAM256	16	645000000 Hz	-0.5 dBmV	40.0 dB	1	0

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	3	5120 Ksym/sec	30600000 Hz	43.5 dBmV
2	Locked	ATDMA	2	5120 Ksym/sec	24200000 Hz	43.0 dBmV
3	Locked	TDMA	1	2560 Ksym/sec	19400000 Hz	43.0 dBmV
4	Locked	ATDMA	4	2560 Ksym/sec	37000000 Hz	44.3 dBmV

Current System Time: Tue Jul 12 22:51:42 2016

[MsRaye]

89/20 still indicates a downstream issue... s/b 200 or 300/20!

[glenvee]

I wondered about that.  He said when he loaned it, that it got 300 down.  I knew that was it's capability but didn't know if he meat that's what I should see at my house using his tech-provisioned modem.  If that's the case, then it's got a big issue.

He also claimed that i'd see the same issues with both modems if mine wasn't bad, but apparently his 16-channel won't drop channels and have partial service fallbacks like my 8-channel, so it IS comparing apples to oranges.

:-\

Thanks.

[glenvee]

P.S..... Any idea why the loaner modem is not showing any uncorrectables but my SB6141 does?

[MsRaye]

TWC may have fixed some of the line issues

the 6183/ has newer technology. or firmware has been doctored.