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Intermittent internet connectivity issues throughout the day

johnhillphoto
New Poster

Intermittent internet connectivity issues throughout the day

I keep having connection issues throughout my work day.  I am connected via a Netgear CM1150V connected directly via ethernet.  What troubleshooting data should I post here to get this issue resolved?

 

Here are some logs from the modem.

 

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1LockedQAM25625603000000 Hz-5.2 dBmV40.2 dB28351739
2LockedQAM2569507000000 Hz-3.6 dBmV41.5 dB30051859
3LockedQAM25610513000000 Hz-3.8 dBmV41.4 dB39276155
4LockedQAM25611519000000 Hz-3.7 dBmV41.3 dB39365898
5LockedQAM25612525000000 Hz-4.2 dBmV41 dB38786138
6LockedQAM25613531000000 Hz-4 dBmV41.2 dB34894467
7LockedQAM25614537000000 Hz-4.3 dBmV41 dB33403994
8LockedQAM25615543000000 Hz-4.5 dBmV40.9 dB36726025
9LockedQAM25616549000000 Hz-4.8 dBmV40.8 dB35485969
10LockedQAM25617555000000 Hz-4.7 dBmV40.7 dB36664444
11LockedQAM25618561000000 Hz-4.5 dBmV40.8 dB33714288
12LockedQAM25619567000000 Hz-5.5 dBmV40.2 dB34524169
13LockedQAM25620573000000 Hz-5 dBmV40.5 dB35305820
14LockedQAM25621579000000 Hz-5.8 dBmV40 dB33784710
15LockedQAM25622585000000 Hz-5.4 dBmV40.2 dB36596018
16LockedQAM25623591000000 Hz-5.7 dBmV40 dB35516022
17LockedQAM25624597000000 Hz-5.2 dBmV40.2 dB35354707
18LockedQAM25626609000000 Hz-5.6 dBmV40 dB36555252
19LockedQAM25627615000000 Hz-5.3 dBmV40.1 dB40316434
20LockedQAM25628621000000 Hz-5 dBmV40.2 dB42346690
21LockedQAM25629627000000 Hz-5.1 dBmV40.1 dB41896333
22LockedQAM25630633000000 Hz-5.2 dBmV39.9 dB37304745
23LockedQAM25631639000000 Hz-5.5 dBmV39.8 dB42806290
24LockedQAM25632645000000 Hz-5.6 dBmV39.6 dB39524664
25LockedQAM25633651000000 Hz-6.4 dBmV39.2 dB42415010
26LockedQAM25634657000000 Hz-5.7 dBmV39.5 dB39704603
27LockedQAM25635663000000 Hz-6.6 dBmV39.1 dB44696338
28LockedQAM25636669000000 Hz-6.1 dBmV39.3 dB48034833
29LockedQAM25637675000000 Hz-6.9 dBmV38.2 dB48416200
30LockedQAM25638681000000 Hz-6.5 dBmV39.2 dB46986185
31LockedQAM25639687000000 Hz-7.1 dBmV38.7 dB47396023
32LockedQAM25640693000000 Hz-6.8 dBmV39 dB44214622
 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1LockedATDMA15120 Ksym/sec36500000 Hz48 dBmV
2LockedATDMA25120 Ksym/sec30100000 Hz47.5 dBmV
3LockedATDMA35120 Ksym/sec23700000 Hz47.5 dBmV
4LockedATDMA45120 Ksym/sec17300000 Hz47.5 dBmV
5Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
 
Downstream OFDM Channels
Channel Lock
Status
Modulation /
Profile ID
Channel
ID
Frequency Power SNR /
MER
Active Subcarrier
Number Range
Unerrored
Codewords
Correctable
Codewords
Uncorrectable
Codewords
1Locked0159702000000 Hz-5.9 dBmV37.4 dB1126 ~ 2969164831979147177002734461034
2Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000
 
Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1Not Locked000 Hz0 dBmV
2Not Locked000 Hz0 dBmV
EG
Expert

Re: Intermittent internet connectivity issues throughout the day

The connection quality / signals is / are a bit on the weak side and they may be intermittently fluctuating even farther 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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johnhillphoto
New Poster

Re: Intermittent internet connectivity issues throughout the day

I will check out each of the connections, and clean as needed.  I will also checkout the single splitter for quality.  I know that there is one splitter inside that splits the one incoming line.  One end goes to cable box, and one to the cable modem.
I will report back if I find any further issues.  Most likely will book a service call after that.

EG
Expert

Re: Intermittent internet connectivity issues throughout the day

Good luck with it !



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!