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T3 T4 Timeouts Reboots often

So I have called twice about this and what do I have to say to get them to come out here?

I read this guys post. This is the SAME EXACT thing happening to me

http://forums.timewarnercable.com/t5/Connectivity/Internet-dropouts-reboots-T3-T4-timeouts/m-p/69615

Location: Matthews, 28105

 

My modem reboots like 5 times or more daily.

I have done research and you guys have helped me in the past, but I am seeing 55 upstream power level. Agent5x I believe had the same concern last time.

What the HECK do I have to say to get them out here?

 

Seriously I'm just upset with TWC.

 


 

Downstream Bonding Channel Value
Channel ID17 18 19 20 21 22 23 24 
Frequency555000000 Hz 561000000 Hz 567000000 Hz 573000000 Hz 579000000 Hz 585000000 Hz 591000000 Hz 597000000 Hz 
Signal to Noise Ratio37 dB 38 dB 37 dB 37 dB 38 dB 37 dB 38 dB 38 dB 
Downstream ModulationQAM256 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
-2 dBmV  -2 dBmV  -3 dBmV  -3 dBmV  -2 dBmV  -2 dBmV  -3 dBmV  -1 dBmV  

 

Upstream Bonding Channel Value
Channel ID
Frequency24200000 Hz 
Ranging Service ID7115 
Symbol Rate5.120 Msym/sec 
Power Level55 dBmV 
Upstream Modulation[3] QPSK
[1] 16QAM
[2] 64QAM
 
Ranging StatusSuccess 

 

Signal Stats (Codewords)Bonding Channel Value
Channel ID17 18 19 20 21 22 23 24 
Total Unerrored Codewords54191775 53343281 53332811 53350501 53324634 53326442 53327800 53342358 
Total Correctable Codewords23 19 15 20 
Total Uncorrectable Codewords556 552 587 1517 2171 1477 1431 1561 
5 REPLIES 5
Expert

Re: T3 T4 Timeouts Reboots often

your upstream is bad, it's maxed out and WILL NOT WORK , it should have 4 US channels!

 

verify there's no extra splitters and everything is tight

Call twc if not obvious, this CANNOT be fixed over the phone, needs a tech out

 

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Re: T3 T4 Timeouts Reboots often

Okay. I am very pleased with TWC now.

Two technicians came out and found nothing at first when looking on modem side. Then they took a reading from the splitter oustide and found noise. This was then isolated to a bad outlet on 1 of 2 TV coaxicals. This was creating ingress and causing the modem to reboot. I did some read and this can even be related to a neighbors wiring causing problems for everyone on that splitter. This sound terrifying because some people do stuff like this picture below I found on a site about ingess. LOL

 (Note:THIS IS NOT MY PHOTO OR MY EQUIPMENT NOT TWC's EITHER )

Link: https://www.dslreports.com/faq/cabletech/3.1_Ingress

 

Now the modem levels look great!!!

So anyone else reading this having similar problems if you want to troubleshoot this on your own. I suggest replacing the connector on all coaxical cables.

Here's the new modem logs:

I had only 1 somtimes 4 bonded upstreams and I have seem the power level on up go as high as 57dB. Now its in the 30-45 range which I read is ideal. Even the downstream changed -3 -4 to -1 which 0 is ideal and range is -15 +15.

Thanks!

Downstream Bonding Channel Value
Channel ID17 18 19 20 21 22 23 24 
Frequency555000000 Hz 561000000 Hz 567000000 Hz 573000000 Hz 579000000 Hz 585000000 Hz 591000000 Hz 597000000 Hz 
Signal to Noise Ratio37 dB 38 dB 37 dB 38 dB 37 dB 38 dB 38 dB 38 dB 
Downstream ModulationQAM256 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
-2 dBmV  -1 dBmV  -2 dBmV  -2 dBmV  -1 dBmV  -1 dBmV  -1 dBmV  -1 dBmV  

 

Upstream Bonding Channel Value
Channel ID
Frequency24200000 Hz 19400000 Hz 30600000 Hz 37000000 Hz 
Ranging Service ID6282 6282 6282 6282 
Symbol Rate5.120 Msym/sec 2.560 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 
Power Level39 dBmV 38 dBmV 41 dBmV 45 dBmV 
Upstream Modulation[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[2] 16QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[3] 16QAM
 
Ranging StatusSuccess Success Success Success 

 

Signal Stats (Codewords)Bonding Channel Value
Channel ID17 18 19 20 21 22 23 24 
Total Unerrored Codewords37274996 36343954 36352847 36361826 36333850 36335024 36336757 36338015 
Total Correctable Codewords18 16 21 20 
Total Uncorrectable Codewords552 1291 590 708 1529 1452 834 654 
Expert

Re: T3 T4 Timeouts Reboots often

the high US and T3-4 errors and resets are probably not caused by ingress but by improper impedance at the splitter causing the isolation to vary.  Splitters only provide rated isolation with proper 75 ohm loads and a noisy one upsets that.

 Yes, a neighbor on the same tapoff can cause DS  ingress, and  anyone anywhere on the node can caus US ingress.

 Glad this is fixed.

 ps. I don't like seeing the 37 mHz upstream channel that high as compared to the 3 others, hopefully you won't have issues.

 Mine look like this: yuck...

Channel ID34 33 35 36 
Frequency24200000 Hz 19400000 Hz 30600000 Hz 37000000 Hz 
Ranging Service ID15528 15528 15528 15528 
Symbol Rate5.120 Msym/sec 2.560 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 
Power Level49 dBmV 48 dBmV 50 dBmV 51 dBmV 
Expert

Re: T3 T4 Timeouts Reboots often

the DSL article is old and with digital qam systems, terminators must be used on all unused ports and as I've said many times, get rid of all unneeded splitters.

It also doesn't mention the strong rf fields generated by 4G phones which didn't exist in 2003 and now operate on the 699-866 channels.

 Back in 2003, there was more analog ntsc tv on air, in 2013 all was gone and ATSC digital only. ATSC looks like noise and is harder to detect as ingress and does more damage to the qam signal.

Qam was invented 20 years before ATSC or 3g/4G cellular technology...

 

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Re: T3 T4 Timeouts Reboots often

Yeah I was doing to reading on that.
Thanks a lot MsRaye!
Thanks to Agent5x, whom I haven't seen in a while. I guess he doesn't want to bump a thread he has all ready given to a lot of help on.
I love you all and I am very happy with TWC.