Random Disconnects at night after Outage 2 Weeks ago

Question

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

EG · Answer

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 ?

Richet · Answer

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

Arris SurfBoard Model SB8200

Downstream Bonded Channels

Channel ID	Lock Status	Modulation	Frequency	Power	SNR/MER	Corrected	Uncorrectables
41	Locked	QAM256	645000000 Hz	-9.1 dBmV	38.0 dB	97	384
13	Locked	QAM256	471000000 Hz	-8.6 dBmV	39.4 dB	53	89
14	Locked	QAM256	477000000 Hz	-8.9 dBmV	39.2 dB	77	334
15	Locked	QAM256	483000000 Hz	-7.7 dBmV	39.5 dB	107	530
16	Locked	QAM256	489000000 Hz	-9.1 dBmV	39.0 dB	30	107
17	Locked	QAM256	495000000 Hz	-7.6 dBmV	39.3 dB	132	608
18	Locked	QAM256	507000000 Hz	-8.9 dBmV	38.8 dB	97	306
19	Locked	QAM256	513000000 Hz	-7.3 dBmV	39.6 dB	105	457
20	Locked	QAM256	519000000 Hz	-8.9 dBmV	38.8 dB	34	113
21	Locked	QAM256	525000000 Hz	-8.7 dBmV	39.0 dB	139	579
22	Locked	QAM256	531000000 Hz	-8.0 dBmV	39.2 dB	85	49
23	Locked	QAM256	537000000 Hz	-9.5 dBmV	38.7 dB	71	304
24	Locked	QAM256	543000000 Hz	-8.3 dBmV	39.1 dB	94	409
25	Locked	QAM256	549000000 Hz	-8.8 dBmV	38.8 dB	58	75
26	Locked	QAM256	555000000 Hz	-9.0 dBmV	38.6 dB	120	525
27	Locked	QAM256	561000000 Hz	-8.1 dBmV	39.0 dB	73	32
28	Locked	QAM256	567000000 Hz	-9.5 dBmV	38.5 dB	79	296
29	Locked	QAM256	573000000 Hz	-8.5 dBmV	38.7 dB	102	339
30	Locked	QAM256	579000000 Hz	-9.6 dBmV	38.3 dB	32	110
31	Locked	QAM256	585000000 Hz	-9.5 dBmV	38.3 dB	128	459
32	Locked	QAM256	591000000 Hz	-8.4 dBmV	38.7 dB	85	28
33	Locked	QAM256	597000000 Hz	-10.2 dBmV	37.9 dB	74	311
34	Locked	QAM256	603000000 Hz	-8.0 dBmV	38.7 dB	75	243
35	Locked	QAM256	609000000 Hz	-8.9 dBmV	38.4 dB	35	104
36	Locked	QAM256	615000000 Hz	-8.9 dBmV	38.3 dB	104	417
37	Locked	QAM256	621000000 Hz	-7.4 dBmV	38.6 dB	104	13
38	Locked	QAM256	627000000 Hz	-9.5 dBmV	37.9 dB	74	334
39	Locked	QAM256	633000000 Hz	-8.1 dBmV	38.4 dB	51	197
40	Locked	QAM256	639000000 Hz	-9.3 dBmV	37.9 dB	22	132
42	Locked	QAM256	651000000 Hz	-8.6 dBmV	38.0 dB	85	0
43	Locked	QAM256	657000000 Hz	-9.5 dBmV	37.7 dB	78	353
44	Locked	QAM256	663000000 Hz	-8.1 dBmV	38.1 dB	57	111
159	Locked	Other	690000000 Hz	-7.7 dBmV	36.0 dB	28175580	12

Upstream Bonded Channels

Channel	Channel ID	Lock Status	US Channel Type	Frequency	Width	Power
1	5	Locked	SC-QAM Upstream	37800000 Hz	6400000 Hz	39.0 dBmV
2	6	Locked	SC-QAM Upstream	31400000 Hz	6400000 Hz	39.0 dBmV
3	7	Locked	SC-QAM Upstream	25000000 Hz	6400000 Hz	39.0 dBmV
4	8	Locked	SC-QAM Upstream	18600000 Hz	6400000 Hz	38.0 dBmV

EG · Answer

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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Richet · Answer

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.

Your Home Network

Richet

Random Disconnects at night after Outage 2 Weeks ago

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