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ebradbury
New Contributor
2 years ago

Connection keeps dropping intermittently. Started happening a couple of months ago. Noticed it stopped for a week or 2 but it is back I need to troubleshoot this. My modem is a Surfboard SB6180

Connection keeps dropping intermittently. Started happening a couple of months ago. Noticed it stopped for a week or 2 but it is back I need to troubleshoot this.

My modem is a Surfboard SB6180

Here are the errors I am getting in the logs

Time Priority Description
2022-09-11 11:53:31 3-Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=
2022-09-11 11:48:35 5-Warning Dynamic Range Window violation
2022-09-11 11:48:16 3-Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=
2022-09-11 11:47:36 3-Critical 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=dc
2022-09-11 11:47:36 3-Critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=d
2022-09-11 11:47:36 3-Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=
2022-09-11 11:46:56 3-Critical 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=dc
2022-09-11 11:46:56 3-Critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=d
2022-09-11 11:46:56 3-Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=
2022-09-11 11:46:36 3-Critical 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=dc
2022-09-11 11:46:36 3-Critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=d
2022-09-11 11:46:36 3-Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=
2022-09-11 11:42:13 5-Warning Dynamic Range Window violation
2022-09-11 11:40:34 3-Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=
2022-09-11 11:39:22 3-Critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance o
2022-09-11 11:39:14 3-Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=
2022-09-11 11:38:50 3-Critical Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=dc:45:17:a2
2022-09-11 11:38:15 3-Critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance o
2022-09-11 11:37:54 3-Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=
2022-09-11 11:37:42 3-Critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance o
2022-09-11 11:37:34 3-Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=
2022-09-11 11:37:10 3-Critical Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=dc:45:17:a2

Here are my numbers as well


Downstream Value
Frequency 855000000 Hz
Signal To Noise Ratio 42.5 dB
Power Level -3.1 dBmV
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

Upstream Value
Channel ID 4
Frequency 36700000 Hz
Power 53.2 dBmV

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 855000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK ^1/00FA0B38/DEF/001
Security Enabled BPI+

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 13 855000000 Hz -3.1 dBmV 42.5 dB 3385 6668
2 Locked QAM256 9 831000000 Hz -3.8 dBmV 42.0 dB 3196 6675
3 Locked QAM256 10 837000000 Hz -4.5 dBmV 41.6 dB 55689 22110
4 Locked QAM256 11 843000000 Hz -4.2 dBmV 41.4 dB 3152 6019
5 Locked QAM256 12 849000000 Hz -3.4 dBmV 42.6 dB 2812 6634
6 Locked QAM256 14 861000000 Hz -4.0 dBmV 40.9 dB 2913 6637
7 Locked QAM256 15 867000000 Hz -4.1 dBmV 40.8 dB 3071 6406
8 Locked QAM256 16 873000000 Hz -3.5 dBmV 40.9 dB 3003 7028

Correctables Uncorrectables
3385 6668


Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 4 5120 Ksym/sec 36700000 Hz 53.2 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 17400000 Hz 53.2 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 23900000 Hz 53.2 dBmV
4 Locked ATDMA 3 5120 Ksym/sec 30300000 Hz 53.2 dBmV

CM IP Address Duration Expires
10.104.60.245 D: 07 H: 00 M: 00 S: 00 Sun Sep 18 02:40:11 2022

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