Community Forum

Time Not Established Critical (3) No Ranging Response received - T3 time-out

johnw75
Regular Visitor

Time Not Established Critical (3) No Ranging Response received - T3 time-out

I've been getting this error and internet drops for at leat a Month now.  We have been working from home and need consistant, stable internet connectivity.  I am a network engineer so it is vital that my connection to the internet does not drop.  My modem is a Netgear CM700 and my router is a TP-Link.  So the modem randomly times out after the 16 response/tries and therefore looses it's public ip.  I've removed all splitters coming from outside into my home.  So I need a tech to come out to test the coax coming from the headend.  How do I make that happen without having an exhausting conversation with Comcast? Here are the logs from the Modem today.  By the way, the logs are a hour begind and I'm not sure if this is a NTP issues or what?  I assume the NTP server would be from Comcast that is given to the Modem?  

 

TimePriorityDescription
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out
Sep 07 2020 17:23:59Warning (5)MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out
Sep 08 2020 04:07:12Warning (5)MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Sep 08 2020 04:41:12Critical (3)No Ranging Response received - T3 time-out
Sep 08 2020 09:48:21Warning (5)MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out
Sep 08 2020 09:54:10Warning (5)MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
EG
Expert

Re: Time Not Established Critical (3) No Ranging Response received - T3 time-out

Modems don't do daylight savings time so the timestamp is normal.

 

That said, What do the modem's signal stats look like ? Try getting them here; http://192.168.100.1

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




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!
johnw75
Regular Visitor

Re: Time Not Established Critical (3) No Ranging Response received - T3 time-out

These are the most db and SNR levels on the upstream and downstream respectivley.  The db's are averiging /hovering around 1 dBmV within spec, which is kind of low, but the SNR are lower than recommended.  Also, the Upstream Bonded is averiging around 47.0 dBmV.  I believe the "best level" should be around 49 dBmV.
 
 
 
 
Starting Frequency

<tabindex=-1>Startup Procedure</tabindex=-1>

ProcedureStatusComment
Acquire Downstream Channel477000000 HzLocked
Connectivity StateOkOperational
Boot StateOkOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)

Downstream Bonded Channels

ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUnCorrectables
1LockedQAM 2561477000000 Hz0.7 dBmV37.6 dB00
2LockedQAM 2562483000000 Hz0.7 dBmV37.6 dB00
3LockedQAM 2563489000000 Hz1.0 dBmV38.6 dB50
4LockedQAM 2564495000000 Hz1.0 dBmV37.6 dB00
5LockedQAM 2565501000000 Hz1.0 dBmV38.6 dB80
6LockedQAM 2566507000000 Hz1.4 dBmV38.6 dB50
7LockedQAM 2567513000000 Hz1.0 dBmV37.6 dB80
8LockedQAM 2568519000000 Hz1.0 dBmV37.6 dB50
9LockedQAM 2569525000000 Hz1.0 dBmV37.6 dB00
10LockedQAM 25610531000000 Hz0.7 dBmV37.6 dB00
11LockedQAM 25611537000000 Hz0.5 dBmV37.3 dB70
12LockedQAM 25612543000000 Hz0.5 dBmV37.3 dB00
13LockedQAM 25613555000000 Hz0.2 dBmV37.3 dB70
14LockedQAM 25614561000000 Hz0.2 dBmV37.3 dB140
15LockedQAM 25615567000000 Hz0.2 dBmV37.6 dB180
16LockedQAM 25616573000000 Hz0.0 dBmV37.6 dB80
17LockedQAM 25617579000000 Hz0.0 dBmV37.3 dB30
18LockedQAM 25618585000000 Hz-0.2 dBmV37.3 dB00
19LockedQAM 25619591000000 Hz-0.7 dBmV37.3 dB90
20LockedQAM 25620597000000 Hz-1.2 dBmV37.3 dB180
21LockedQAM 25621603000000 Hz-1.9 dBmV36.6 dB140
22LockedQAM 25622609000000 Hz-1.7 dBmV36.3 dB160
23LockedQAM 25623615000000 Hz-1.5 dBmV36.6 dB170
24LockedQAM 25624621000000 Hz-0.7 dBmV36.6 dB00
25LockedQAM 25625627000000 Hz0.0 dBmV36.9 dB30
26LockedQAM 25626633000000 Hz0.4 dBmV36.9 dB60
27LockedQAM 25627639000000 Hz1.0 dBmV37.3 dB00
28LockedQAM 25628645000000 Hz1.0 dBmV37.3 dB00
29LockedQAM 25629651000000 Hz1.5 dBmV37.3 dB00
30LockedQAM 25630657000000 Hz1.5 dBmV37.3 dB00
31LockedQAM 25631663000000 Hz1.5 dBmV37.3 dB30
32LockedQAM 25632669000000 Hz1.7 dBmV37.3 dB100

Upstream Bonded Channels

ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA75120 Ksym/sec16400000 Hz47.5 dBmV
2LockedATDMA65120 Ksym/sec22800000 Hz47.8 dBmV
3LockedATDMA55120 Ksym/sec29200000 Hz47.3 dBmV
4LockedATDMA45120 Ksym/sec35600000 Hz46.8 dBmV
5LockedATDMA101280 Ksym/sec39600000 Hz47.3 dBmV
6Not LockedN/AUnknown0 Ksym/sec0 Hz0.0 dBmV
7Not LockedN/AUnknown0 Ksym/sec0 Hz0.0 dBmV
8Not LockedN/AUnknown0 Ksym/sec0 Hz0.0 dBmV
EG
Expert

Re: Time Not Established Critical (3) No Ranging Response received - T3 time-out

The stats are fine. There are no uncorrectable bit errors.

 

Are there any error / event log entries being shown ? If so, please post them as well.



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!
johnw75
Regular Visitor

Re: Time Not Established Critical (3) No Ranging Response received - T3 time-out

No.  Just more of the same... My wife is on a Teams call right now with her Boss and the internet keps dropping.  I need to get this fix or I need to find a new ISP.  Please note how many "Critical (3) T3 time-out" drops!  " ie internet dropps since 4 am!  Do you know how to get a Tech to come out or do I need to call them directly?

 

 

TimePriorityDescription
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out
Sep 07 2020 17:23:59Warning (5)MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out
Sep 08 2020 04:07:12Warning (5)MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Sep 08 2020 04:41:12Critical (3)No Ranging Response received - T3 time-out
Sep 08 2020 09:48:21Warning (5)MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out
Sep 08 2020 09:54:10Warning (5)MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Sep 08 2020 11:52:11Critical (3)No Ranging Response received - T3 time-out
Sep 08 2020 14:28:05Warning (5)MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1




EG
Expert

Re: Time Not Established Critical (3) No Ranging Response received - T3 time-out

Even though the signal stats looked o/k at that snapshot in time, the error log entries confirm that something is going on. Perhaps there is noise ingress into the line(s) somewhere.

 

There are other signal stat figures that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.


I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. They can check the CMTS (Cable Modem Termination System) for any real time degradation and / or error reports, see your node / cable plant and modem health, and see whether or not everything is in the green zone. They can also see a history plot for the modem and poll for those upstream receive signal stats.

You should get a reply here in your topic. Good luck !



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!
ComcastTambrey
Official Employee

Re: Time Not Established Critical (3) No Ranging Response received - T3 time-out

Hello, johnw75! Welcome to the Xfinity Forums.

Thanks for working with our Expert EG here to get a better idea of your situation with intermittent connectivity. I would love to take a closer look and see if we can pinpoint a cause or get one of our wonderful field techs out to make repairs.  Please send me a private message with your first and last name, as well as your service address so I can assist. 

 

 To send a private message, click my name "ComcastTambrey", then click "send a message".


I am an Official Comcast Employee.
Official Employees are from multiple teams within Comcast: CARE, Product, Leadership. 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!