OptimumOnline → Which of these signal levels look good?

New service for a week and intermittent drops from off and on, third tech will be out here tomorrow. I have noticed on the cable modem several scenarios:

1. The light all go out like the thing is rebooting.
2. Up/Downstream lights are flashing yellow
3. Numerous errors in the cable modem logs "No Ranging Response received - T3 time-out" "SYNC Timing Synchronization failure - Loss of Sync"
4. Status page for the modem, sometimes looks fine, other times some of the channels seem out, right not there is only one downstream channel showing the rest disappeared !

Please tell me what Power/SNR is normally so I can troubleshoot the tech tomorrow.

*** **** SAMPLE READINGS BELOW **** ****

*** FROM ORIGINAL INSTALLER *****

Downstream 1 2 609.00 MHz -9.24 dBmV 36.84 dB 256QAM 143627724 275139328 284161634
Downstream 2 1 603.00 MHz -8.91 dBmV 36.84 dB 256QAM 79050337 248743034 255058460
Downstream 3 3 615.00 MHz -9.30 dBmV 37.09 dB 256QAM 9941395 289626867 306756249
Downstream 4 4 621.00 MHz -9.02 dBmV 35.78 dB 256QAM 28676293 276432652 282745986
Downstream 5 5 627.00 MHz -9.03 dBmV 36.61 dB 256QAM 15073843 297107474 273194421
Downstream 6 6 633.00 MHz -8.78 dBmV 37.09 dB 256QAM 16349151 292036815 270663754
Downstream 7 7 639.00 MHz -8.85 dBmV 36.84 dB 256QAM 15132983 277537400 249643774
Downstream 8 8 645.00 MHz -9.24 dBmV 36.84 dB 256QAM 16389892 292288778 272079240

**** TECH VISIT #2 *****

Downstream 1 2 609.00 MHz -1.42 dBmV 38.26 dB 256QAM 8217054 13634313 10886799
Downstream 2 1 603.00 MHz -1.33 dBmV 37.09 dB 256QAM 5251147 13549609 10887679
Downstream 3 3 615.00 MHz -1.62 dBmV 36.84 dB 256QAM 4961669 13690135 10943718
Downstream 4 4 621.00 MHz -1.35 dBmV 37.94 dB 256QAM 10083262 13638835 10921708
Downstream 5 5 627.00 MHz -1.32 dBmV 38.26 dB 256QAM 6079712 13812893 9615298
Downstream 6 6 633.00 MHz -1.14 dBmV 38.26 dB 256QAM 4944529 13710400 9591438
Downstream 7 7 639.00 MHz -1.40 dBmV 37.94 dB 256QAM 5337405 13789448 9583375
Downstream 8 8 645.00 MHz -1.76 dBmV 38.26 dB 256QAM 6054375 13744183 9575617

**** WHEN THINGS GO HAYWIRE *****

Downstream 1 2 609.00 MHz ---- ---- ---- ---- ---- ----
Downstream 2 1 603.00 MHz ---- ---- ---- ---- ---- ----
Downstream 3 3 615.00 MHz ---- ---- ---- ---- ---- ----
Downstream 4 4 621.00 MHz -1.39 dBmV 34.77 dB 256QAM 10087304 13938994 12273903
Downstream 5 5 627.00 MHz -1.31 dBmV 37.36 dB 256QAM 6083002 14117956 10882253
Downstream 6 6 633.00 MHz ---- ---- ---- ---- ---- ----
Downstream 7 7 639.00 MHz ---- ---- ---- ---- ---- ----
Downstream 8 8 645.00 MHz ---- ---- ---- ---- ---- ----

Is that an Arris modem?
Your S/N are excellent.

Yes, Arris. But why would downstream channels just disappear.

Could be any of a number of things...signal ingress, equipment failure, etc. Other than doing basic troubleshooting, you need a tech to resolve this problem. The challenge with things like noise or ingress is that they can be transient and difficult to track down, but you have to start with tech support and stay on them.

Did you copy and paste the columns out of order or something? I thought it went Total Octets / Correctable Octets / Uncorrectable? But you have more uncorrectables than total in all your print-outs.

Regardless, with such a high number of uncorrectables and now the fact that you're losing channels, something is definitely going wrong. There must be some serious noise on the line.

What did the 2nd tech do? They should've replaced all coax ends and probably the ground-block outside if you have one by this point.

Did you try to obtain the levels on the internal page WHILE the modem was still restarting?