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A lot of disconnects on a regular basis

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Frequent Visitor

A lot of disconnects on a regular basis

I get this message, "Started Unicast Maintenance Ranging - No Response received - T3 time-out;" A LOT. followed by, " SYNC Timing Synchronization failure - Failed to acquire FEC framing;"

 

I've been getting pages and pages of those since I moved in my house two years and always wrote it off the modem/router until I did some research here. It used to go down several times a day for a few minutes at a time. VERY frustrating.

 

I realized the tech who installed my internet two years ago used cheap splitters. Since I only have internet with xifinity now, i discovered where the splitters can be taken away. i seem to have a direct line from the outside almost straight to my modem/router [netgear model c7000 v2]. since i removed the splitters, i have been getting those errors less, but still get enough of them to be disruptive

 

I work from home and rely on my internet connection.  For as many times as it goes down, it is entirely unacceptable. 

 

I've run through all the basic checks from this page and still get pages of these errors...along with a lot of other critical errors such as, " Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4"

 

While it works, it works fantastically! I get solid low pings and more speed than my plan [300 and tag 350+/- from xfinity speed test hard wired].

 

what else can the issue possibly be if it isn't poor quality splitters that were being used unbeknownst to me as installed by the tech? 

Highlighted
Expert

Re: A lot of disconnects on a regular basis

Are your modem's power levels and SNR figures within spec as per that troubleshooting tips sticky topic that you linked to ?



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Frequent Visitor

Re: A lot of disconnects on a regular basis

this is what i am getting. is there something i need to do to correct the "correctables" and if so, how may i correct them?  signal to noise ratio seems slightly above the chart suggested. thanks!!

Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM2569525000000 Hz10.5 dBmV40 dB1960
2LockedQAM25610531000000 Hz10.3 dBmV40.1 dB1948
3LockedQAM25611537000000 Hz9.8 dBmV39.9 dB19151
4LockedQAM25612543000000 Hz8.1 dBmV39 dB3828
5LockedQAM25613555000000 Hz8 dBmV39.2 dB4625
6LockedQAM25614561000000 Hz9.2 dBmV39.1 dB4674
7LockedQAM25615567000000 Hz9.9 dBmV40.1 dB2047
8LockedQAM25616573000000 Hz10.3 dBmV40.2 dB4030
9LockedQAM25617579000000 Hz10.1 dBmV40 dB1572
10LockedQAM25618585000000 Hz10.7 dBmV40.3 dB28112
11LockedQAM25619591000000 Hz10.8 dBmV40.2 dB18103
12LockedQAM25620597000000 Hz10.6 dBmV40.1 dB1970
13LockedQAM25621603000000 Hz10.8 dBmV40.1 dB1362
14LockedQAM25622609000000 Hz10.8 dBmV40.1 dB3094
15LockedQAM25623615000000 Hz11.2 dBmV40.3 dB1375
16LockedQAM25624621000000 Hz10.9 dBmV40.2 dB1564
17LockedQAM25625627000000 Hz10.4 dBmV39.9 dB00
18LockedQAM25626633000000 Hz10.6 dBmV40.2 dB00
19LockedQAM25627639000000 Hz10.7 dBmV39.9 dB00
20LockedQAM25628645000000 Hz10.6 dBmV40.4 dB00
21LockedQAM25630651000000 Hz10.2 dBmV39.9 dB00
22LockedQAM25631657000000 Hz9.9 dBmV39.5 dB00
23LockedQAM25632663000000 Hz10.2 dBmV39.8 dB00
24LockedQAM25633669000000 Hz10.6 dBmV40.3 dB00
 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA65120 Ksym/sec29200000 Hz34 dBmV
2LockedATDMA55120 Ksym/sec35600000 Hz31.8 dBmV
3LockedATDMA75120 Ksym/sec22800000 Hz34.3 dBmV
4LockedATDMA85120 Ksym/sec16400000 Hz34.2 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
Highlighted
Frequent Visitor

Re: A lot of disconnects on a regular basis

i would have replied sooner, but was having another one of those moments.

 

this is what i am seeing now. how am i getting so many of those "incorrectables" and how do i correct the correctables? i rebooted the modem...again...and the report generated was similar, but with ZERO incorrectables and correctables across the board.

Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel525000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM2569525000000 Hz10.3 dBmV40 dB397137
2LockedQAM25610531000000 Hz10.6 dBmV40.2 dB419130
3LockedQAM25611537000000 Hz10.6 dBmV40.2 dB418227
4LockedQAM25612543000000 Hz10.1 dBmV40 dB411112
5LockedQAM25613555000000 Hz10.5 dBmV40.3 dB37798
6LockedQAM25614561000000 Hz10.4 dBmV39.5 dB411154
7LockedQAM25615567000000 Hz10.3 dBmV40.2 dB424137
8LockedQAM25616573000000 Hz10.1 dBmV40.1 dB386125
9LockedQAM25617579000000 Hz9.6 dBmV39.9 dB341159
10LockedQAM25618585000000 Hz10.1 dBmV40.1 dB291175
11LockedQAM25619591000000 Hz10 dBmV40 dB334179
12LockedQAM25620597000000 Hz9.7 dBmV39.8 dB369146
13LockedQAM25621603000000 Hz9.9 dBmV39.8 dB249133
14LockedQAM25622609000000 Hz10.1 dBmV40 dB286163
15LockedQAM25623615000000 Hz10.1 dBmV40 dB268136
16LockedQAM25624621000000 Hz9.8 dBmV39.9 dB26492
17LockedQAM25625627000000 Hz9.1 dBmV39 dB00
18LockedQAM25626633000000 Hz9 dBmV39 dB00
19LockedQAM25627639000000 Hz8.6 dBmV38.8 dB00
20LockedQAM25628645000000 Hz7.7 dBmV38.2 dB00
21LockedQAM25630651000000 Hz5.7 dBmV36.5 dB00
22LockedQAM25631657000000 Hz4 dBmV35.1 dB00
23LockedQAM25632663000000 Hz5.2 dBmV36.2 dB00
24LockedQAM25633669000000 Hz7.1 dBmV37.5 dB00
 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA65120 Ksym/sec29200000 Hz33.5 dBmV
2LockedATDMA55120 Ksym/sec35600000 Hz31.3 dBmV
3LockedATDMA75120 Ksym/sec22800000 Hz34.8 dBmV
4LockedATDMA85120 Ksym/sec16400000 Hz35.2 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
 
Extended Upstream Transmit Power
Enable Extended Upstream Transmit Power
 
Current System Time:Mon Aug 03 15:29:04 2020
System Up Time:2 days 04:24:01
Highlighted
Frequent Visitor

Re: A lot of disconnects on a regular basis


@EG wrote:

I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. They will be able to poll the CMTS to see whether or not everything is in the green zone, see your node / cable plant and modem health, and also see a history plot for the modem. You should get a reply here in your topic. Good luck !

 


I certainly would love to hear back too on this thread. I appreciate your help, @EG 

Highlighted
Frequent Visitor

Re: A lot of disconnects on a regular basis

08/03/20 Time: 6:08pm  this is insteresting. i have been down for the last hour. although i could access SOME sites, i couldn't access all sites. i could access facebook, but not cnn, for instance nor could my home assistant devices reach out. i kept getting "no interenet" responses from them and my rokus and TV. 

 

after i rebooted, i noticed the reports showed ZERO correctables and uncorrectables. i am finally back on line again and just saw all of these errors. what is going on? why does my internet go down so often? this isn't what i am paying for!

 

Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel525000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM2569525000000 Hz9.4 dBmV39.4 dB1018112
2LockedQAM25610531000000 Hz8.4 dBmV39.1 dB1109114
3LockedQAM25611537000000 Hz7.4 dBmV38.6 dB938129
4LockedQAM25612543000000 Hz7.7 dBmV38.8 dB1178131
5LockedQAM25613555000000 Hz10.3 dBmV40.2 dB1041105
6LockedQAM25614561000000 Hz10.7 dBmV39.6 dB1118104
7LockedQAM25615567000000 Hz10.7 dBmV40.4 dB102597
8LockedQAM25616573000000 Hz10.8 dBmV40.4 dB998101
9LockedQAM25617579000000 Hz10.4 dBmV40.1 dB1024128
10LockedQAM25618585000000 Hz10.9 dBmV40.3 dB999107
11LockedQAM25619591000000 Hz10.9 dBmV40.3 dB902105
12LockedQAM25620597000000 Hz10.7 dBmV40.1 dB99597
13LockedQAM25621603000000 Hz10.8 dBmV40.1 dB94998
14LockedQAM25622609000000 Hz10.9 dBmV40.2 dB89897
15LockedQAM25623615000000 Hz11.2 dBmV40.3 dB83972
16LockedQAM25624621000000 Hz11 dBmV40.2 dB84181
17LockedQAM25625627000000 Hz10.5 dBmV40 dB00
18LockedQAM25626633000000 Hz10.6 dBmV40.4 dB00
19LockedQAM25627639000000 Hz10.7 dBmV40.3 dB00
20LockedQAM25628645000000 Hz10.6 dBmV40.3 dB00
21LockedQAM25630651000000 Hz10.3 dBmV39.9 dB00
22LockedQAM25631657000000 Hz9.9 dBmV39.9 dB00
23LockedQAM25632663000000 Hz10.2 dBmV39.9 dB00
24LockedQAM25633669000000 Hz10.7 dBmV40.3 dB00
 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA55120 Ksym/sec35600000 Hz31.5 dBmV
2LockedATDMA65120 Ksym/sec29200000 Hz33.8 dBmV
3LockedATDMA75120 Ksym/sec22800000 Hz34.8 dBmV
4LockedATDMA85120 Ksym/sec16400000 Hz36 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
 
Extended Upstream Transmit Power
Enable Extended Upstream Transmit Power
 
Current System Time:Mon Aug 03 17:04:26 2020
System Up Time:01:32:38