Community Forum

Internet drops - Constant T3 Timeouts Arris SB8200

Frequent Visitor

Internet drops - Constant T3 Timeouts Arris SB8200

HELP...
 
This has been going on for about a month and no satisfaction.... Yes internet get slow and drops out from all the T3 messages... Can someone look into this? Yes tech has been out and nothing wrong... been on tech support had 2 supervisors on the phone and still no results... Tech said my modem and router are fine its a known problem in the area... yea he put in his report i have equiment issues... JUST WANT IT FIXED... Contacted Arris and I am afraid my modem is fine and xfinity has coax connection problems...
 
SEE INFO BELOW
 
Event Log

The table below contains the log of events that the SB8200 has detected. This log can be important to the service provider to help diagnose and correct problems, if any should occur.

Time Priority Description
12-17-2018, 17:40:11 Warning(5) "Dynamic Range Window violation"
12-17-2018, 17:15:56 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:40 Notice(6) "Honoring MDD; IP provisioning mode = IPv6"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 17:12:13 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:37 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 17:10:59 Critical(3) "Resetting the cable modem due to docsDevResetNow"
12-17-2018, 16:24:41 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:39 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 16:23:23 Critical(3) "Resetting the cable modem due to docsDevResetNow"
1-1-1970, 0:0:38 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 16:8:54 Critical(3) "Resetting the cable modem due to docsDevResetNow"
12-17-2018, 10:45:46 Critical(3) "16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:45:46 Critical(3) "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:45:46 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:44:43 Critical(3) "16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:44:43 Critical(3) "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:44:43 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:44:35 Critical(3) "16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:44:35 Critical(3) "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:44:35 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:44:13 Critical(3) "16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:44:13 Critical(3) "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:44:13 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:37:19 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 10:37:1 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 7:30:47 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 7:30:46 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 6:22:18 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 6:22:16 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-17-2018, 6:22:15 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-16-2018, 18:35:7 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-16-2018, 11:40:46 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-16-2018, 10:9:5 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-16-2018, 2:3:48 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-16-2018, 2:3:38 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-16-2018, 2:3:37 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-15-2018, 12:34:0 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-15-2018, 4:40:51 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-15-2018, 4:33:8 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-15-2018, 4:17:2 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-15-2018, 1:2:0 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-14-2018, 23:36:24 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-14-2018, 18:1:33 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-14-2018, 18:1:8 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-14-2018, 14:15:7 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:38 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"Product Information.pngStatus (1) SB8200 121718.png
Expert

Re: Internet drops - Constant T3 Timeouts Arris SB8200

O/k I can't see your pics at the bottom but I can see your error / event log entries. Since you are a new poster, they may need to be approved by a Forum Admin. Or you may need to make a minimum number of posts.

You could try hosting them at one of those free third-party pic hosting sites and post the link to them here.   Please also post the modem's signal stats.

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!
Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

Connection

The status listed show the connection state of the cable modem. They are used by your service provider to evaluate the operation of the cable modem.

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 669000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK  
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed  

 
Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
32 Locked QAM256 669000000 Hz -7.8 dBmV 37.3 dB 162 441
1 Locked QAM256 483000000 Hz -6.6 dBmV 38.2 dB 740 1123
2 Locked QAM256 489000000 Hz -6.9 dBmV 37.9 dB 784 1084
3 Locked QAM256 495000000 Hz -7.2 dBmV 38.0 dB 708 1090
4 Locked QAM256 501000000 Hz -7.6 dBmV 37.9 dB 666 1053
5 Locked QAM256 507000000 Hz -7.6 dBmV 37.8 dB 724 1066
6 Locked QAM256 513000000 Hz -7.4 dBmV 37.9 dB 671 1042
7 Locked QAM256 519000000 Hz -7.4 dBmV 38.0 dB 687 1067
8 Locked QAM256 525000000 Hz -7.2 dBmV 37.7 dB 564 992
9 Locked QAM256 561000000 Hz -8.1 dBmV 37.4 dB 591 904
10 Locked QAM256 567000000 Hz -7.8 dBmV 37.5 dB 459 883
11 Locked QAM256 573000000 Hz -7.3 dBmV 37.9 dB 490 912
13 Locked QAM256 585000000 Hz -6.7 dBmV 38.2 dB 401 854
14 Locked QAM256 591000000 Hz -6.4 dBmV 38.2 dB 371 922
15 Locked QAM256 597000000 Hz -6.4 dBmV 38.3 dB 424 865
16 Locked QAM256 603000000 Hz -6.3 dBmV 38.4 dB 393 885
17 Locked QAM256 609000000 Hz -6.4 dBmV 38.3 dB 365 872
18 Locked QAM256 615000000 Hz -6.5 dBmV 38.3 dB 391 813
19 Locked QAM256 621000000 Hz -6.7 dBmV 38.2 dB 394 760
20 Locked QAM256 627000000 Hz -7.0 dBmV 37.9 dB 349 782
21 Locked QAM256 633000000 Hz -7.4 dBmV 37.7 dB 375 746
22 Locked QAM256 639000000 Hz -7.7 dBmV 37.7 dB 364 753
23 Locked QAM256 645000000 Hz -7.8 dBmV 37.5 dB 317 721
24 Locked QAM256 651000000 Hz -8.0 dBmV 37.3 dB 321 639
25 Locked QAM256 531000000 Hz -7.2 dBmV 38.2 dB 547 937
26 Locked QAM256 537000000 Hz -7.2 dBmV 38.0 dB 587 953
27 Locked QAM256 543000000 Hz -7.4 dBmV 37.9 dB 590 1067
28 Locked QAM256 549000000 Hz -7.8 dBmV 37.5 dB 490 913
29 Locked QAM256 555000000 Hz -8.1 dBmV 37.3 dB 541 891
30 Locked QAM256 657000000 Hz -8.2 dBmV 37.3 dB 317 625
31 Locked QAM256 663000000 Hz -8.1 dBmV 37.3 dB 362 623
33 Locked Other 720000000 Hz -3.7 dBmV 35.2 dB 8679924 0

 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 1 Locked SC-QAM 35800000 Hz 6400000 Hz 43.3 dBmV
2 2 Locked SC-QAM 29400000 Hz 6400000 Hz 42.5 dBmV
3 3 Locked SC-QAM 23000000 Hz 6400000 Hz 42.0 dBmV
4 4 Locked SC-QAM 16600000 Hz 6400000 Hz 41.3 dBmV

 

Current System Time: Tue Dec 18 07:46:10 2018

Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

Configuration
Downstream Frequency (Hz)
Upstream Channel ID
Downstream Frequency Plan

 

Expert

Re: Internet drops - Constant T3 Timeouts Arris SB8200

O/k this may or may not be the root cause of your problem but nevertheless it should be addressed regardless. The downstream power is on the weak / low side and may be intermittently fluctuating even lower to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, and speed and latency problems.

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.




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!
Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

Hi EG,

 

Thanks for your reply... and yes I agree levels are on the the low side.  Speed tests are all over the place!

 

We only use Xfinity as internet and it was new coax as of 4 years ago direct run from

house service box to modem and no splitters or couples other than lighting protection out side at home service box, YES we have opened every connection and inspected for the usual corrission and such and all are fine and dandy.  Have talked to neighbors near and far and everyone is seeing slow intermittent internet problem.... 

 

Have tech coming but the last one had no clue... subcontractor who told us our modem router and cabling was fine and it is a known problem they are working on it that was over 3 weeks ago... when I had the agent on the phone I ask if he could share the notes the tech turned in... the tech said in his report we had equipment problems... WOW Just want it to work!!!

Expert

Re: Internet drops - Constant T3 Timeouts Arris SB8200

Good luck with it ! Please post back with how it goes.



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!
Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

Hi EG,

 

Do you have the spec's for the UP and Downsteam dBmV  power? Also the SNR/MER.  I can't find it anywhere.

 

Thanks again for your help.

Expert

Re: Internet drops - Constant T3 Timeouts Arris SB8200

If you mean what they should be, the figures are here;

 

https://forums.xfinity.com/t5/Your-Home-Network/Xfinity-Internet-Connection-Troubleshooting-Tips/m-p...



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!
Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

Thanks EG

 

Ok yes the tech measured signal at pedestal by street had +6.7dBmV at house service box he had -5.6dBmV at router-6.1dBmV. Suggestion is to replace old RG6 with RG11 to get better signal to the house. Did proficient job (replaced all f connectors and new lightning protection and filter with ground,) but still signal levels on low side and speeds got slower… Go figure… said they will call and schedule when to install RG11, RG11 Will help looking at its lessor loss specs but still nowhere close to 0dBmV or better signal strength. So we will see.

 

Event Log

The table below contains the log of events that the SB8200 has detected. This log can be important to the service provider to help diagnose and correct problems, if any should occur.

Time Priority Description
12-18-2018, 16:2:33 Notice(6) "Honoring MDD; IP provisioning mode = IPv6"
12-18-2018, 16:2:26 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
12-18-2018, 15:56:36 Critical(3) "No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-18-2018, 15:56:35 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-18-2018, 15:56:27 Critical(3) "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-18-2018, 15:56:26 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-18-2018, 15:56:19 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"
12-18-2018, 15:56:19 Critical(3)

"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:ac:b5;CMTS-MAC=00:01:5c:88:18:50;CM-QOS=1.1;CM-VER=3.1;"

 

Bottom of Form

 

Connection

The status listed show the connection state of the cable modem. They are used by your service provider to evaluate the operation of the cable modem.

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 669000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK  
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed  

 
Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
32 Locked QAM256 669000000 Hz -7.1 dBmV 36.7 dB 36 0
1 Locked QAM256 483000000 Hz -5.5 dBmV 37.7 dB 2057 6737
2 Locked QAM256 489000000 Hz -5.8 dBmV 37.7 dB 2194 7285
3 Locked QAM256 495000000 Hz -6.0 dBmV 37.6 dB 2083 7129
4 Locked QAM256 501000000 Hz -6.4 dBmV 37.3 dB 2067 6876
5 Locked QAM256 507000000 Hz -6.5 dBmV 37.4 dB 2055 7009
6 Locked QAM256 513000000 Hz -6.3 dBmV 37.4 dB 2091 7496
7 Locked QAM256 519000000 Hz -6.2 dBmV 37.6 dB 2269 7540
8 Locked QAM256 525000000 Hz -6.2 dBmV 37.6 dB 2221 7228
9 Locked QAM256 561000000 Hz -7.1 dBmV 36.8 dB 1740 5838
10 Locked QAM256 567000000 Hz -6.9 dBmV 37.0 dB 1992 5897
11 Locked QAM256 573000000 Hz -6.4 dBmV 37.3 dB 1873 5958
12 Locked QAM256 579000000 Hz -6.1 dBmV 37.5 dB 1892 6090
13 Locked QAM256 585000000 Hz -5.8 dBmV 37.5 dB 1926 5899
14 Locked QAM256 591000000 Hz -5.5 dBmV 37.7 dB 1982 6518
15 Locked QAM256 597000000 Hz -5.5 dBmV 37.7 dB 1949 6196
16 Locked QAM256 603000000 Hz -5.5 dBmV 37.8 dB 1991 6168
17 Locked QAM256 609000000 Hz -5.6 dBmV 37.8 dB 1920 6070
18 Locked QAM256 615000000 Hz -5.7 dBmV 37.8 dB 1830 5903
19 Locked QAM256 621000000 Hz -5.9 dBmV 37.5 dB 2010 6037
20 Locked QAM256 627000000 Hz -6.3 dBmV 37.4 dB 2107 6194
22 Locked QAM256 639000000 Hz -6.9 dBmV 37.0 dB 1883 5397
23 Locked QAM256 645000000 Hz -7.0 dBmV 37.1 dB 1913 5364
24 Locked QAM256 651000000 Hz -7.3 dBmV 36.8 dB 1990 5986
25 Locked QAM256 531000000 Hz -6.1 dBmV 37.7 dB 1660 5162
26 Locked QAM256 537000000 Hz -6.2 dBmV 37.5 dB 1830 5893
27 Locked QAM256 543000000 Hz -6.4 dBmV 37.4 dB 1778 5859
28 Locked QAM256 549000000 Hz -6.7 dBmV 37.0 dB 1819 5883
29 Locked QAM256 555000000 Hz -7.0 dBmV 36.9 dB 1753 5394
30 Locked QAM256 657000000 Hz -7.5 dBmV 36.5 dB 1749 4763
31 Locked QAM256 663000000 Hz -7.4 dBmV 36.6 dB 1550 4691
33 Locked Other 720000000 Hz -5.8 dBmV 34.8 dB 2060626 0

 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 4 Locked SC-QAM 16600000 Hz 6400000 Hz 39.0 dBmV
2 1 Locked SC-QAM 35800000 Hz 6400000 Hz 41.0 dBmV
3 2 Locked SC-QAM 29400000 Hz 6400000 Hz 40.5 dBmV
4 3 Locked SC-QAM 23000000 Hz 6400000 Hz 39.8 dBmV

 

Current System Time: Tue Dec 18 19:49:02 2018

 

Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

here is a link to speed test... Before todays tech visit and work we were getting at least 50 down and 10.7 up now lucky to get 30 down and 8 up. Thats not good. I am on the blast, it was aluted to me to down grade to a slower speed, I took it as they can't provide 100 down and 10 up...

 

 

 

What about a drop amp???

Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

Thanks for this link EG

 

Downstream Power Levels: -13dBmV to  +13dBmV

Downstream Signal to Noise Ratio (SNR):  >33dB 

Upstream Power Level:  +25dBmV to +54dBmV

Upstream Signal to Noise Ratio (uSNR): >31dB  

Upstream Receive Power: -2dBmV to +2dBmV

Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

AFTER NEW CABLE INSTALLED... Less Signal is not good, was better with old cable!!!

 

Connection

The status listed show the connection state of the cable modem. They are used by your service provider to evaluate the operation of the cable modem.

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 669000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK  
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed  

 
Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
32 Locked QAM256 669000000 Hz -10.0 dBmV 37.6 dB 60 267
1 Locked QAM256 483000000 Hz -7.7 dBmV 38.9 dB 0 0
2 Locked QAM256 489000000 Hz -8.0 dBmV 38.9 dB 0 0
3 Locked QAM256 495000000 Hz -8.2 dBmV 38.6 dB 0 0
4 Locked QAM256 501000000 Hz -8.6 dBmV 38.7 dB 1 0
5 Locked QAM256 507000000 Hz -8.6 dBmV 38.8 dB 0 0
6 Locked QAM256 513000000 Hz -8.6 dBmV 38.7 dB 0 0
7 Locked QAM256 519000000 Hz -8.4 dBmV 38.9 dB 0 0
9 Locked QAM256 561000000 Hz -8.8 dBmV 38.4 dB 0 0
10 Locked QAM256 567000000 Hz -8.5 dBmV 38.6 dB 0 0
11 Locked QAM256 573000000 Hz -8.1 dBmV 38.6 dB 0 0
12 Locked QAM256 579000000 Hz -7.7 dBmV 39.1 dB 0 0
13 Locked QAM256 585000000 Hz -7.4 dBmV 39.1 dB 0 0
14 Locked QAM256 591000000 Hz -7.2 dBmV 39.0 dB 0 0
15 Locked QAM256 597000000 Hz -7.0 dBmV 39.0 dB 0 0
16 Locked QAM256 603000000 Hz -7.1 dBmV 39.2 dB 0 0
17 Locked QAM256 609000000 Hz -7.5 dBmV 39.2 dB 0 0
18 Locked QAM256 615000000 Hz -7.6 dBmV 38.9 dB 0 0
19 Locked QAM256 621000000 Hz -7.8 dBmV 38.9 dB 0 0
20 Locked QAM256 627000000 Hz -8.3 dBmV 38.8 dB 6 0
21 Locked QAM256 633000000 Hz -8.9 dBmV 38.4 dB 8 0
22 Locked QAM256 639000000 Hz -9.6 dBmV 38.2 dB 8 0
23 Locked QAM256 645000000 Hz -10.1 dBmV 38.0 dB 0 0
24 Locked QAM256 651000000 Hz -10.4 dBmV 37.7 dB 0 0
25 Locked QAM256 531000000 Hz -8.0 dBmV 39.0 dB 0 0
26 Locked QAM256 537000000 Hz -7.8 dBmV 39.1 dB 0 0
27 Locked QAM256 543000000 Hz -7.9 dBmV 38.9 dB 0 0
28 Locked QAM256 549000000 Hz -8.5 dBmV 38.7 dB 0 0
29 Locked QAM256 555000000 Hz -8.7 dBmV 38.4 dB 0 0
30 Locked QAM256 657000000 Hz -10.6 dBmV 36.7 dB 0 0
31 Locked QAM256 663000000 Hz -10.3 dBmV 37.4 dB 4 0
33 Locked Other 690000000 Hz -9.0 dBmV 19.2 dB 28974 1030

 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 1 Locked SC-QAM 35800000 Hz 6400000 Hz 56.5 dBmV
2 2 Locked SC-QAM 29400000 Hz 6400000 Hz 59.0 dBmV
3 3 Locked SC-QAM 23000000 Hz 6400000 Hz 57.8 dBmV
4 4 Locked SC-QAM 16600000 Hz 6400000 Hz 50.5 dBmV
Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

Speed Test after new cable to house... WOW SLOW....Afternewcoax122018.jpg

Frequent Visitor

Re: Internet drops - Constant T3 Timeouts Arris SB8200

122018newcabletest2.jpg

Expert

Re: Internet drops - Constant T3 Timeouts Arris SB8200

Yep. The signals are worse. You should get the techs re-involved !



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!
New Poster

Re: Internet drops - Constant T3 Timeouts Arris SB8200

I know this is an old post but if you haven't solved it, I had a similar issue which seems to have resolved by doing a factory reset.  I found this post:  https://us.battle.net/forums/en/d3/topic/20758296421 and so far so good.

Expert

Re: Internet drops - Constant T3 Timeouts Arris SB8200

A reset can not physically and permanently remedy power level / connection quality / line hardware problems. This requires a "boots on the ground" approach.

 

Dead thread from last year now being closed.



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!