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justincaser
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Saturday, June 20th, 2020 6:00 PM

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"Started Unicast Maintenance Ranging - No Response received", "Dynamic Range Window violation"

Hi all, 

 

Really at wits end here. For the past few months I've experienced frequent connection drops from 10 seconds to 1-2 minutes. Bought a new modem and the issue persists. 

 

Any help would be greatly appreciated!

 

Here's a short excerpt from my brand new (not refurb) Arris SB6183 Event Log:

 

Fri Jun 19 21:59:54 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 00:40:57 2020 Warning (5) Dynamic Range Window violation
Sat Jun 20 01:02:59 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 01:24:14 2020 Warning (5) Dynamic Range Window violation
Sat Jun 20 03:59:24 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 12:44:55 2020 Warning (5) Dynamic Range Window violation
Sat Jun 20 13:57:13 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 13:58:28 2020 Warning (5) Dynamic Range Window violation
Sat Jun 20 14:17:48 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 14:18:08 2020 Warning (5) Dynamic Range Window violation
Sat Jun 20 16:20:44 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 18:17:46 2020 Warning (5) Dynamic Range Window violation
Sat Jun 20 19:49:19 2020 Warning (5) MDD message timeout;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 19:49:19 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 19:50:22 2020 Warning (5) MDD message timeout;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 19:50:22 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 19:59:36 2020 Warning (5) MDD message timeout;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;
Sat Jun 20 19:59:37 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=f8:a0:97:b9:1e:e1;CMTS-MAC=00:5f:86:93:d7:22;CM-QOS=1.1;CM-VER=3.0;

 

 

And modem status:

 

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

 
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Corrected Uncorrectables
1 Locked QAM256 9 507000000 Hz -1.0 dBmV 32.8 dB 26220 11492
2 Locked QAM256 1 459000000 Hz 2.1 dBmV 35.8 dB 63437 54602
3 Locked QAM256 2 465000000 Hz 1.9 dBmV 35.8 dB 88342 186272
4 Locked QAM256 3 471000000 Hz 1.1 dBmV 35.5 dB 29958 37989
5 Locked QAM256 4 477000000 Hz -0.4 dBmV 35.4 dB 75952 57047
6 Locked QAM256 5 483000000 Hz -0.9 dBmV 35.3 dB 193797 128819
7 Locked QAM256 6 489000000 Hz -0.6 dBmV 35.3 dB 65525 101781
8 Locked QAM256 7 495000000 Hz -0.7 dBmV 35.2 dB 90167 84881
9 Locked QAM256 8 501000000 Hz -0.3 dBmV 35.2 dB 95336 91190
10 Locked QAM256 10 513000000 Hz -0.6 dBmV 34.6 dB 76833 55088
11 Locked QAM256 11 519000000 Hz -0.3 dBmV 35.0 dB 71143 72669
12 Locked QAM256 12 525000000 Hz -0.2 dBmV 35.0 dB 26096 35789
13 Locked QAM256 13 531000000 Hz 0.3 dBmV 35.0 dB 35088 41469
14 Locked QAM256 14 537000000 Hz 0.9 dBmV 35.0 dB 18602 37679
15 Locked QAM256 15 543000000 Hz 0.8 dBmV 34.8 dB 20344 26600
16 Locked QAM256 16 549000000 Hz 0.7 dBmV 34.8 dB 25177 22471

 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 2 5120 Ksym/sec 30100000 Hz 39.0 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 36500000 Hz 40.0 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 23700000 Hz 39.7 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 17300000 Hz 40.0 dBmV


 

Current System Time: Sat Jun 20 20:00:50 2020

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