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1 Gig service T3 timeouts

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1 Gig service T3 timeouts

So, I have the 1 Gig speed internet service, and the Motorola MB8600.  I've had both since around September of 2017 and had no issues.  For the past 3 weeks I've had random dropouts of my internet (both wired and wifi) on a daily basis.  

 

The modem event log shows the following:

Log  
  
    Time    Priority    Description 
    20:27:59
Fri May 24 2019
  Warning (5)   Dynamic Range Window violation
    20:28:00
Fri May 24 2019
  Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    20:28:02
Fri May 24 2019
  Warning (5)   RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    20:28:02
Fri May 24 2019
  Warning (5)   Dynamic Range Window violation
    20:28:28
Fri May 24 2019
  Warning (5)   RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    20:28:28
Fri May 24 2019
  Warning (5)   Dynamic Range Window violation
    20:28:57
Fri May 24 2019
  Warning (5)   RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    20:28:57
Fri May 24 2019
  Warning (5)   Dynamic Range Window violation
    20:29:56
Fri May 24 2019
  Warning (5)   RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    20:29:56
Fri May 24 2019
  Warning (5)   Dynamic Range Window violation
    23:11:58
Fri May 24 2019
  Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:11:58
Fri May 24 2019
  Warning (5)   RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:11:58
Fri May 24 2019
  Warning (5)   Dynamic Range Window violation
    23:11:58
Fri May 24 2019
  Warning (5)   RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:11:58
Fri May 24 2019
  Warning (5)   Dynamic Range Window violation
    23:11:58
Fri May 24 2019
  Warning (5)   RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:11:58
Fri May 24 2019
  Warning (5)   Dynamic Range Window violation
    23:11:58
Fri May 24 2019
  Warning (5)   RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:11:58
Fri May 24 2019
  Warning (5)   Dynamic Range Window violation
    23:13:43
Fri May 24 2019
  Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:13:43
Fri May 24 2019
  Critical (3)   Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:13:43
Fri May 24 2019
  Critical (3)   16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:13:45
Fri May 24 2019
  Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:13:46
Fri May 24 2019
  Notice (6)   CM-STATUS message sent. Event Type Code: 7; Chan ID: 5; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:17:15
Fri May 24 2019
  Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:17:29
Fri May 24 2019
  Critical (3)   Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:17:31
Fri May 24 2019
  Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:17:31
Fri May 24 2019
  Critical (3)   Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:17:39
Fri May 24 2019
  Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:17:42
Fri May 24 2019
  Critical (3)   Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;
    23:17:58
Fri May 24 2019
  Notice (6)   Honoring MDD; IP provisioning mode = IPv6
    06:47:14
Sat May 25 2019
  Critical (3)  

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:40:36:4a:f8:33;CMTS-MAC=00:01:5c:6b:de:47;CM-QOS=1.1;CM-VER=3.1;

 

 

 

And the connection settings show the following:

 

Connection
   Startup Sequence    
   Startup Step Status Comment

  
   Acquire Downstream Channel 555000000 Hz Locked
  
   Upstream Connection OK Operational
  
   Boot State OK Operational

  
   Configuration File OK  
  
   Security Enabled BPI+
  


   Connection Status    
   System Up Time 0 days 13h:40m:18s  
  
   Network Access Allowed  
  


   Downstream Bonded Channels  
  
   Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (d Corrected Uncorrected
   1 Locked QAM256 9 555.0 3.7 39.8 8450 16655
   2 Locked QAM256 6 537.0 5.6 40.1 8664 16357
   3 Locked QAM256 7 543.0 4.8 40.1 9011 16190
   4 Locked QAM256 8 549.0 4.4 40.2 8854 15485
   5 Locked QAM256 10 561.0 3.6 39.8 8527 16370
   6 Locked QAM256 11 567.0 4.0 40.0 8267 15365
   7 Locked QAM256 12 573.0 4.5 39.9 8278 15157
   8 Locked QAM256 13 579.0 5.3 40.1 8175 14948
   9 Locked QAM256 14 585.0 5.6 40.1 7891 14847
   10 Locked QAM256 15 591.0 6.1 40.3 7741 14510
   11 Locked QAM256 16 597.0 6.1 40.1 8038 14618
   12 Locked QAM256 17 603.0 6.3 40.0 7619 14391
   13 Locked QAM256 18 609.0 6.3 40.0 7383 14335
   14 Locked QAM256 19 615.0 6.4 40.0 7335 14392
   15 Locked QAM256 20 621.0 7.0 40.2 6965 13960
   16 Locked QAM256 21 627.0 6.9 40.0 7331 13634
   17 Locked QAM256 22 633.0 7.0 40.1 6857 13567
   18 Locked QAM256 23 639.0 7.2 40.0 6925 13243
   19 Locked QAM256 24 645.0 7.4 40.0 6757 13223
   20 Locked OFDM PLC 25 780.0 9.6 15.0 2920 1
   21 Locked QAM256 26 651.0 7.4 39.8 6514 12892
   22 Locked QAM256 27 657.0 7.6 39.9 6493 12576
   23 Locked QAM256 28 663.0 7.8 39.8 6209 12327
   24 Locked QAM256 29 669.0 7.7 40.0 6354 11801
   25 Locked QAM256 30 675.0 7.8 39.7 116 69
   26 Locked QAM256 31 681.0 7.6 40.2 85 74
   27 Locked QAM256 32 687.0 7.6 39.9 68 88
   28 Locked QAM256 33 693.0 7.7 40.2 97 70
   29 Locked QAM256 34 699.0 7.9 40.1 95 71
   30 Locked QAM256 35 705.0 7.9 40.1 93 61
   31 Locked QAM256 36 711.0 8.0 40.1 116 59
   32 Locked QAM256 37 717.0 7.9 40.2 64 62


   Upstream Bonded Channels  
  
   Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
   1 Locked SC-QAM 5 5120 17.3 45.3
   2 Locked SC-QAM 6 5120 23.7 46.0
   3 Locked SC-QAM 7 5120 30.1 47.0
   4 Locked SC-QAM 8 5120 36.5 46.5

 

Any help would be greatly appreciated.  Thanks!

Gold Problem Solver

Re: 1 Gig service T3 timeouts

The signal levels and SNRs you posted look OK, but the error counts are on the high side and the multiple "Dynamic Range Window violation" and "Commanded Power in Excess" messages in the error log suggest an intermittent connection with Comcast's network.

 

If you want to troubleshoot this yourself, please see Troubleshooting Gigabit Internet Speeds and Connection Troubleshooting Tips. Loss of Internet service is often due to a poor connection between your equipment and Comcast's network, usually in or near your home.

If you can't find the problem or you'd rather have Comcast do the troubleshooting, call them at the phone number on your bill or 1-800-Comcast, or chat with them using the Internet Support option at https://support.xfinity.com/chat. If they can't fix the problem remotely, insist they send a tech out to identify the cause and correct it.

If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit unless you have their Service Protection Plan (https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device, or anything outside your home, you shouldn't be charged.

Official Employee

Re: 1 Gig service T3 timeouts

Greetings Gary_H1! I appreciate you taking the time to reach out to us here on the forums. I hope you are having an amazing day. I apologize to hear you are having issues with your internet service. Certainly is frustrating when the connection seems to be unreliable at times. If what BruceW provided hasn't yielded any results, I can certainly take a deeper dive into the signal and neighborhood node and see if there is anything going on there. Feel free to send me a PM with your first and last name so I may further assist you.

 

To send a private message, please click my name "ComcastMichael" then select "Send a Message" on the right side.


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.
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Official Employee

Re: 1 Gig service T3 timeouts

Hello, Gary_H1. I have not heard back from you and hope your issue has been resolved. If you still need assistance, please feel free to start a new thread.


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!