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Random Disconnects at night after Outage 2 Weeks ago

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Random Disconnects at night after Outage 2 Weeks ago

For two weeks after there was an outage in our area we have been having random disconnects that cause interuption of service for 10 seconds at a time.

This happens on both Wireless and Wired Connection.

Have reset the Modem and router and there is no change in it happening.

It seems to happen more at night then it does during the day.

 

In the logs of the Modem see the following events all the time.

 

RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW

Dynamic Range Window violation

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Expert

Re: Random Disconnects at night after Outage 2 Weeks ago

Please also post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

What is the exact make and model number of the modem ?




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Re: Random Disconnects at night after Outage 2 Weeks ago

Here is the information on the Modem and the upstream and downstream information

 

Arris SurfBoard  Model SB8200

 

Downstream Bonded Channels
Channel IDLock StatusModulationFrequencyPowerSNR/MERCorrectedUncorrectables
41LockedQAM256645000000 Hz-9.1 dBmV38.0 dB97384
13LockedQAM256471000000 Hz-8.6 dBmV39.4 dB5389
14LockedQAM256477000000 Hz-8.9 dBmV39.2 dB77334
15LockedQAM256483000000 Hz-7.7 dBmV39.5 dB107530
16LockedQAM256489000000 Hz-9.1 dBmV39.0 dB30107
17LockedQAM256495000000 Hz-7.6 dBmV39.3 dB132608
18LockedQAM256507000000 Hz-8.9 dBmV38.8 dB97306
19LockedQAM256513000000 Hz-7.3 dBmV39.6 dB105457
20LockedQAM256519000000 Hz-8.9 dBmV38.8 dB34113
21LockedQAM256525000000 Hz-8.7 dBmV39.0 dB139579
22LockedQAM256531000000 Hz-8.0 dBmV39.2 dB8549
23LockedQAM256537000000 Hz-9.5 dBmV38.7 dB71304
24LockedQAM256543000000 Hz-8.3 dBmV39.1 dB94409
25LockedQAM256549000000 Hz-8.8 dBmV38.8 dB5875
26LockedQAM256555000000 Hz-9.0 dBmV38.6 dB120525
27LockedQAM256561000000 Hz-8.1 dBmV39.0 dB7332
28LockedQAM256567000000 Hz-9.5 dBmV38.5 dB79296
29LockedQAM256573000000 Hz-8.5 dBmV38.7 dB102339
30LockedQAM256579000000 Hz-9.6 dBmV38.3 dB32110
31LockedQAM256585000000 Hz-9.5 dBmV38.3 dB128459
32LockedQAM256591000000 Hz-8.4 dBmV38.7 dB8528
33LockedQAM256597000000 Hz-10.2 dBmV37.9 dB74311
34LockedQAM256603000000 Hz-8.0 dBmV38.7 dB75243
35LockedQAM256609000000 Hz-8.9 dBmV38.4 dB35104
36LockedQAM256615000000 Hz-8.9 dBmV38.3 dB104417
37LockedQAM256621000000 Hz-7.4 dBmV38.6 dB10413
38LockedQAM256627000000 Hz-9.5 dBmV37.9 dB74334
39LockedQAM256633000000 Hz-8.1 dBmV38.4 dB51197
40LockedQAM256639000000 Hz-9.3 dBmV37.9 dB22132
42LockedQAM256651000000 Hz-8.6 dBmV38.0 dB850
43LockedQAM256657000000 Hz-9.5 dBmV37.7 dB78353
44LockedQAM256663000000 Hz-8.1 dBmV38.1 dB57111
159LockedOther690000000 Hz-7.7 dBmV36.0 dB2817558012


 

 
Upstream Bonded Channels
ChannelChannel IDLock StatusUS Channel TypeFrequencyWidthPower
15LockedSC-QAM Upstream37800000 Hz6400000 Hz39.0 dBmV
26LockedSC-QAM Upstream31400000 Hz6400000 Hz39.0 dBmV
37LockedSC-QAM Upstream25000000 Hz6400000 Hz39.0 dBmV
48LockedSC-QAM Upstream18600000 Hz6400000 Hz38.0 dBmV


 

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Expert

Re: Random Disconnects at night after Outage 2 Weeks ago

The downstream power is on the low / weak side and it may be intermittently fluctuating even lower to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.



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New Poster

Re: Random Disconnects at night after Outage 2 Weeks ago

Dont have any Coax cable splitters in the line.
The Coax Cable is only about 3 feet long from the coax port in the wall from the wall. Tightness is good as well.
Need to check the connection.