I

Tuesday, January 14th, 2025 5:58 PM

Motorola MB8611 keeps loosing connection.

I have a Motorola MB8611, and have been at this address for 2 years (I bought the modem new when we moved in). This last year I noticed a few times when the internet would drop out, but not enough to investigate. In the last month, it started dropping out more and more. After some investigation with my router and finding no issues, I did some searching online and realized that the modem could be the problem. The next time the internet went out, I checked and my modem appeared to have rebooted and was going through the setup procedure (connecting upstream, downstream, etc). I took a look at the status page, and saw some logged errors. Based on previous forum and reddit posts I did some re-wiring and removed a splitter outside. Now the cable goes directly into the room with the modem. That seemed to help. it went from ~2 disconnects per hour to going several hours without a restart. That was yesterday. But today I've had quite a few restarts in the morning. The Connection Info page seems to indicate everything is in range (although the uncorrected numbers are higher today than usual. Most of the time the QAM256 channels are all at 0). But I also can't connect to the page as the modem is re-connecting, so I can't see if the levels spike or drop around the time of the outage. I figured I'd post here to see if someone more knowledgeable has any tips before getting a service call. One other note: outside of the restarts, the internet works great and I'm getting the speeds I pay for.

Connection Page:

  Startup Sequence    
   Startup Step Status Comment

  
   Acquire Downstream Channel 453000000 Hz Locked
  
   Upstream Connection OK Operational
  
   Boot State OK Operational

  
   Configuration File OK
  
   Security Enabled BPI+
  


   Connection Status    
   System Up Time 0 days 01h:58m:19s  
  
   Network Access Allowed  
  


   Downstream Bonded Channels  
  
   Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
   1 Locked QAM256 12 453.0 4.3 44.6 8414 6451
   2 Locked QAM256 1 387.0 5.8 45.3 6312 4863
   3 Locked QAM256 2 393.0 5.6 45.3 5813 4607
   4 Locked QAM256 3 399.0 5.5 45.2 5821 4451
   5 Locked QAM256 4 405.0 5.5 45.2 5498 4650
   6 Locked QAM256 5 411.0 5.4 44.8 5664 4742
   7 Locked QAM256 6 417.0 5.2 45.0 5942 5109
   8 Locked QAM256 7 423.0 4.8 45.0 6272 5385
   9 Locked QAM256 8 429.0 4.6 44.8 7079 6469
   10 Locked QAM256 9 435.0 4.3 44.7 8083 6738
   11 Locked QAM256 10 441.0 4.1 44.6 8150 6938
   12 Locked QAM256 11 447.0 4.2 44.5 8547 6507
   13 Locked QAM256 13 459.0 4.3 44.4 7980 5879
   14 Locked QAM256 14 465.0 4.3 44.6 6980 5254
   15 Locked QAM256 15 471.0 4.3 44.5 6177 4926
   16 Locked QAM256 16 477.0 4.3 43.8 4859 4175
   17 Locked QAM256 17 483.0 4.2 44.2 4137 3682
   18 Locked QAM256 18 489.0 4.1 44.5 3822 3257
   19 Locked QAM256 19 495.0 4.0 44.4 4396 3321
   20 Locked QAM256 20 501.0 3.8 44.3 5142 3642
   21 Locked QAM256 21 507.0 3.5 44.0 5667 4396
   22 Locked QAM256 22 513.0 3.2 44.1 6318 4944
   23 Locked QAM256 23 519.0 2.9 43.8 6527 5376
   24 Locked QAM256 24 525.0 3.0 43.8 7007 5568
   25 Locked QAM256 25 531.0 3.0 43.8 6966 5465
   26 Locked QAM256 26 537.0 3.1 43.8 7625 5345
   27 Locked QAM256 27 543.0 3.2 43.8 7306 5279
   28 Locked QAM256 28 549.0 3.3 43.8 6845 5089
   29 Locked QAM256 29 555.0 3.5 43.9 5742 5403
   30 Locked QAM256 30 561.0 3.5 43.8 4790 5444
   31 Locked QAM256 31 567.0 3.4 43.8 3479 4646
   32 Locked QAM256 32 573.0 3.6 43.8 2838 3211
   33 Locked OFDM PLC 193 722.0 1.8 42.7 37342873 59690
   34 Locked OFDM PLC 194 957.0 -0.1 42.0 28009575 6015


   Upstream Bonded Channels  
  
   Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
   1 Locked SC-QAM 17 5120 16.4 46.5
   2 Locked SC-QAM 18 5120 22.8 46.8
   3 Locked SC-QAM 19 5120 29.2 46.8
   4 Locked SC-QAM 20 5120 35.6 47.3

Event Log

(around the time of the most recent outage):

  09:38:05
Tue Jan 14 2025
  Notice (6)   CM-STATUS message sent. Event Type Code: 16; Chan ID: 193 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:38:07
Tue Jan 14 2025
  Notice (6)   CM-STATUS message sent. Event Type Code: 16; Chan ID: 193 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:40:27
Tue Jan 14 2025
  Notice (6)   CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:40:40
Tue Jan 14 2025
  Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:40:41
Tue Jan 14 2025
  Warning (5)   RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:40:41
Tue Jan 14 2025
  Warning (5)   Dynamic Range Window violation
    09:40:42
Tue Jan 14 2025
  Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:40:56
Tue Jan 14 2025
  Warning (5)   RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:40:56
Tue Jan 14 2025
  Warning (5)   Dynamic Range Window violation
    09:40:58
Tue Jan 14 2025
  Warning (5)   RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:40:58
Tue Jan 14 2025
  Warning (5)   Dynamic Range Window violation
    09:41:38
Tue Jan 14 2025
  Notice (6)   CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:41:41
Tue Jan 14 2025
  Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
    09:42:08
Tue Jan 14 2025
  Notice (6)   CM-STATUS message sent. Event Type Code: 24; Chan ID: 193 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 2 3.;CM-MAC=<redact>;CMTS-MAC=<redact>;CM-QOS=1.1;CM-VER=3.1;
No Responses!
forum icon

New to the Community?

Start Here