Bonded downstream channels

[glenvee]

So..... if the loaner 16-channel downstream modem shows no uncorrectables at all after 2 days, and I hook my own 8-channel modem up, if mine starts showing high uncorrectables and dropped channels again, does that mean my modem is bad?

[MsRaye]

Maybe... maybe not...

Newer modems have better DSP technology.

 I doubt the old modem is actually bad

it's design just doesn't work well on TWC's mess...

Spectrum is supposed to be providing free modems.. wait.

[glenvee]

That's the same line of thought I've been having re: the DSP tech on the modems.  I wonder how long it will be till they drop the modem rental fee.  I'd just use theirs once the fee is dropped.

[glenvee]

Finally the loaner modem did *something*..... though one T3 Timeout isn't much to complain about.  Perhaps it was loss of upstream path....

Time Priority Description

Fri Jul 15 16:18:27 2016

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=78:96:84:e9:11:a5;CMTS-MAC=00:17:10:8a:37:0e;CM-QOS=1.1;CM-VER=3.0;

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	-0.9 dBmV	40.0 dB	3	0
2	Locked	QAM256	2	561000000 Hz	-1.1 dBmV	40.0 dB	0	0
3	Locked	QAM256	3	567000000 Hz	-0.9 dBmV	40.1 dB	2	0
4	Locked	QAM256	1	555000000 Hz	-1.3 dBmV	40.0 dB	5	0
5	Locked	QAM256	5	579000000 Hz	-1.0 dBmV	39.9 dB	7	0
6	Locked	QAM256	6	585000000 Hz	-0.6 dBmV	40.0 dB	6	0
7	Locked	QAM256	7	591000000 Hz	-0.3 dBmV	40.2 dB	6	0
8	Locked	QAM256	8	597000000 Hz	0.2 dBmV	40.4 dB	6	0
9	Locked	QAM256	9	603000000 Hz	0.2 dBmV	40.4 dB	5	0
10	Locked	QAM256	10	609000000 Hz	-0.1 dBmV	40.2 dB	10	0
11	Locked	QAM256	11	615000000 Hz	-0.4 dBmV	40.1 dB	6	0
12	Locked	QAM256	12	621000000 Hz	-0.5 dBmV	40.0 dB	5	0
13	Locked	QAM256	13	627000000 Hz	-0.4 dBmV	40.0 dB	3	0
14	Locked	QAM256	14	633000000 Hz	-0.2 dBmV	40.1 dB	4	0
15	Locked	QAM256	15	639000000 Hz	-0.2 dBmV	40.1 dB	1	0
16	Locked	QAM256	16	645000000 Hz	-0.3 dBmV	40.0 dB	2	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	42.8 dBmV
2	Locked	ATDMA	2	5120 Ksym/sec	24200000 Hz	42.8 dBmV
3	Locked	TDMA	1	2560 Ksym/sec	19400000 Hz	41.8 dBmV
4	Locked	ATDMA	4	2560 Ksym/sec	37000000 Hz	44.0 dBmV

[glenvee]

Update:  I'm back using my modem, SB6141, but with the power supply from the loaner, the tech's SB6183, to see if the power supply from mine is bad.  The tech hasn't seen any issue with signals this week in my area and he does not know if any further work was done by the maintenance crews at my neighbors' homes.  I set up my modem direct to my computer, and then through my router, and the speedtest results were the same ... 59 Mbps down /6 up, as it should be.  Now we wait and see what my modem does and if I have any related connectivity issues again.

Note: with the tech's full-speed-provisioned modem, when connected directly to my PC's Gigabit Ethernet, it gets 248 Mbps down /23 up.  When I was getting 89 down with his modem, it was going through my non-Gigabit router and was limited by it.

Here's a link to a screenshot of my modem signals right after connecting it:

https://techshots.shutterfly.com/pictures/25

Here's my signal page after rebooting the modem and connecting via my router....

Downstream Bonding Channel Value

Channel ID	1	2	3	4	5	6	7	8
Frequency	555000000 Hz	561000000 Hz	567000000 Hz	573000000 Hz	579000000 Hz	585000000 Hz	591000000 Hz	597000000 Hz
Signal to Noise Ratio	37 dB	37 dB	38 dB	38 dB	37 dB	38 dB	38 dB	38 dB
Downstream Modulation	QAM256	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	-1 dBmV	0 dBmV	0 dBmV	0 dBmV	0 dBmV	0 dBmV	0 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	5972	5972	5972	5972
Symbol Rate	2.560 Msym/sec	5.120 Msym/sec	5.120 Msym/sec	2.560 Msym/sec
Power Level	44 dBmV	43 dBmV	43 dBmV	43 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	4	5	6	7	8
Total Unerrored Codewords	136188633	135226180	135243775	135234273	135217039	135217330	135216920	135218524
Total Correctable Codewords	1	1	7	7	19	46	11	15
Total Uncorrectable Codewords	584	1296	479	1383	651	1399	595	1577

[glenvee]

...and in the time it took me to post that last comment, my 6141 dropped channel 6 and replaced it with channel 14.  Nothing new in the logs since the initial connect, so far.

Downstream Bonding Channel Value

Channel ID	1	2	3	4	5	7	8	14
Frequency	555000000 Hz	561000000 Hz	567000000 Hz	573000000 Hz	579000000 Hz	591000000 Hz	597000000 Hz	633000000 Hz
Signal to Noise Ratio	37 dB	37 dB	38 dB	38 dB	37 dB	38 dB	38 dB	38 dB
Downstream Modulation	QAM256	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	-1 dBmV	-1 dBmV	-1 dBmV	0 dBmV	0 dBmV	0 dBmV	0 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	5972	5972	5972	5972
Symbol Rate	2.560 Msym/sec	5.120 Msym/sec	5.120 Msym/sec	2.560 Msym/sec
Power Level	44 dBmV	43 dBmV	43 dBmV	43 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	4	5	7	8	14
Total Unerrored Codewords	147818767	146856314	146873910	146864408	146847173	137248079	137248842	137251538
Total Correctable Codewords	1	1	7	7	19	63	51	28
Total Uncorrectable Codewords	584	1296	479	1383	651	3037	2085	2981

[MsRaye]

You have ingress issues still... 585 mHz (ch6) it local tv ch 33 getting in somewhere, could be anywhere from the modem, to the cable head end miles away

[glenvee]

But the tech doesn't see any problem, he says the SB6141 gives them a lot of problems.  The problem is it doesn't handle the ingress issues from TWC lines being under-maintained in some neighborhoods.  I don't see how I can get them to do anything to fix this.

Why no ingress issues with the tech's loaner modem though??

Now two hours later, another channel has dropped and been replaced.  Still nothing new in the modem log.  I haven't been online so I haven't seen symptoms.

  I don't see why I have to buy a $100 modem when there isn't anything wrong with mine, and my 50/5 speed is more than covered by my 6141.   The tech apparently wants me to rent my modem from TWC so he can replace it with the 6183.  I don't want to rent one.  He has no idea if and when Spectrum will drop the modem rental charge in this area.

Downstream Bonding Channel Value

Channel ID	1	2	3	4	5	8	11	14
Frequency	555000000 Hz	561000000 Hz	567000000 Hz	573000000 Hz	579000000 Hz	597000000 Hz	615000000 Hz	633000000 Hz
Signal to Noise Ratio	38 dB	38 dB	38 dB	38 dB	37 dB	38 dB	38 dB	37 dB
Downstream Modulation	QAM256	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	-1 dBmV	-1 dBmV	-1 dBmV	0 dBmV	0 dBmV	0 dBmV	0 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	5972	5972	5972	5972
Symbol Rate	2.560 Msym/sec	5.120 Msym/sec	5.120 Msym/sec	2.560 Msym/sec
Power Level	44 dBmV	43 dBmV	44 dBmV	43 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	4	5	8	11	14
Total Unerrored Codewords	551412478	550450024	550467620	550458118	550440885	225081080	225079070	540845135
Total Correctable Codewords	2	3	9	8	19	78	98	28
Total Uncorrectable Codewords	584	1296	479	1383	651	4554	2661	2981

[glenvee]

I suspect downstream channel 8 will drop next.

[glenvee]

Service slowdown for a minute, and sure enough, lost a downstream channel altogether, now only have 7 down instead of 8.

TimePriorityCodeMessage

Jul 17 2016 18:56:33	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 17 2016 18:56:33	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;

Downstream Bonding Channel Value

Channel ID	1	2	3	5	8	11	12
Frequency	555000000 Hz	561000000 Hz	567000000 Hz	579000000 Hz	597000000 Hz	615000000 Hz	621000000 Hz
Signal to Noise Ratio	38 dB	38 dB	38 dB	38 dB	38 dB	38 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	2 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	5972	5972	5972	5972
Symbol Rate	2.560 Msym/sec	5.120 Msym/sec	5.120 Msym/sec	2.560 Msym/sec
Power Level	44 dBmV	43 dBmV	43 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	8	11	12
Total Unerrored Codewords	1351106177	1350143723	1350161317	1326078672	1326051997	1000687829	1000682294
Total Correctable Codewords	2	3	11	23	35	95	113
Total Uncorrectable Codewords	584	1296	479	3084	1346	6032	4058