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Forum Discussion
CM1000 w/ R7000P
Hi I’ve had my modem and router for a couple of years. Everything was working fine till couple months ago my internet has been buggy. I noticed the modem upstream light will blink green then st...
| 11 | Locked | QAM256 | 11 | 795000000 Hz | 8.9 dBmV | 42.7 dB | 86892372 | 0 | 0 |
| 12 | Locked | QAM256 | 12 | 801000000 Hz | 9.0 dBmV | 42.7 dB | 86899213 | 0 | 0 |
| 13 | Locked | QAM256 | 13 | 807000000 Hz | 9.1 dBmV | 42.7 dB | 86906720 | 0 | 0 |
| 14 | Locked | QAM256 | 14 | 813000000 Hz | 9.2 dBmV | 42.7 dB | 86914866 | 0 | 0 |
| 15 | Locked | QAM256 | 15 | 819000000 Hz | 9.1 dBmV | 42.8 dB | 86922259 | 0 | 0 |
| 16 | Locked | QAM256 | 16 | 825000000 Hz | 9.1 dBmV | 42.8 dB | 86929503 | 0 | 0 |
| 17 | Locked | QAM256 | 17 | 831000000 Hz | 9.1 dBmV | 42.7 dB | 86937175 | 0 | 0 |
| 18 | Locked | QAM256 | 18 | 837000000 Hz | 9.1 dBmV | 42.7 dB | 86944389 | 0 | 0 |
| 19 | Locked | QAM256 | 19 | 843000000 Hz | 9.4 dBmV | 42.9 dB | 86952100 | 0 | 0 |
20 Locked QAM256 20 849000000 Hz 9.5 dBmV 43.0 dB 86959089 0 0 21 Locked QAM256 21 855000000 Hz 9.7 dBmV 43.0 dB 86967015 0 0 22 Locked QAM256 22 861000000 Hz 9.7 dBmV 43.1 dB 86974503 0 0 23 Locked QAM256 23 867000000 Hz 9.6 dBmV 43.0 dB 86980209 0 0 24 Locked QAM256 24 873000000 Hz 9.8 dBmV 42.9 dB 86984289 0 0 25 Locked QAM256 45 237000000 Hz 3.9 dBmV 41.7 dB 86989349 0 0 26 Locked QAM256 41 213000000 Hz 4.1 dBmV 41.9 dB 91159570 0 0 27 Locked QAM256 42 219000000 Hz 3.8 dBmV 41.8 dB 91163150 0 0 28 Locked QAM256 43 225000000 Hz 3.9 dBmV 41.9 dB 91167130 0 0 29 Locked QAM256 44 231000000 Hz 3.9 dBmV 41.9 dB 91170120 0 0 30 Locked QAM256 46 243000000 Hz 3.9 dBmV 41.9 dB 91168249 0 0 31 Locked QAM256 47 249000000 Hz 4.0 dBmV 41.8 dB 91168939 0 0 32 Locked QAM256 48 255000000 Hz 4.0 dBmV 41.6 dB 91168578 0 0 Upstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power 1 Locked ATDMA 1 36300000 Hz 43.3 dBmV 2 Locked ATDMA 2 29900000 Hz 43.3 dBmV 3 Locked ATDMA 3 23500000 Hz 43.3 dBmV 4 Locked ATDMA 4 16900000 Hz 43.3 dBmV 5 Not Locked Unknown 0 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Hz 0.0 dBmV Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked QAM256 5 759000000 Hz 8.7 dBmV 42.5 dB 199607454 0 0 2 Locked QAM256 1 735000000 Hz 8.7 dBmV 42.6 dB 202956000 0 0 3 Locked QAM256 2 741000000 Hz 8.7 dBmV 42.7 dB 202962778 0 0 4 Locked QAM256 3 747000000 Hz 8.6 dBmV 42.6 dB 202966329 0 0 5 Locked QAM256 4 753000000 Hz 8.7 dBmV 42.5 dB 202970352 0 0 6 Locked QAM256 9 783000000 Hz 9.1 dBmV 42.8 dB 198742790 0 0 7 Locked QAM256 6 765000000 Hz 8.9 dBmV 42.7 dB 202977433 0 0 8 Locked QAM256 7 771000000 Hz 9.1 dBmV 42.6 dB 202981608 0 0 9 Locked QAM256 8 777000000 Hz 9.1 dBmV 42.7 dB 202985074 0 0 10 Locked QAM256 10 789000000 Hz 9.0 dBmV 42.7 dB 198773699 0 0
Can we get the Event Logs page data as well.
Power for some of our channels is too much and too high.
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
I'd day get a -3 or -6dbm cable coax line attenuator installed.
11 Locked QAM256 11 795000000 Hz 8.9 dBmV 42.7 dB 86892372 0 0
12 Locked QAM256 12 801000000 Hz 9.0 dBmV 42.7 dB 86899213 0 0
13 Locked QAM256 13 807000000 Hz 9.1 dBmV 42.7 dB 86906720 0 0
14 Locked QAM256 14 813000000 Hz 9.2 dBmV 42.7 dB 86914866 0 0
15 Locked QAM256 15 819000000 Hz 9.1 dBmV 42.8 dB 86922259 0 0
16 Locked QAM256 16 825000000 Hz 9.1 dBmV 42.8 dB 86929503 0 0
17 Locked QAM256 17 831000000 Hz 9.1 dBmV 42.7 dB 86937175 0 0
18 Locked QAM256 18 837000000 Hz 9.1 dBmV 42.7 dB 86944389 0 0
19 Locked QAM256 19 843000000 Hz 9.4 dBmV 42.9 dB 86952100 0 0Here you go. Seeing a lot of critical.
The coax line attenuator is that something I need to connect my ISP or can I do it myself. Where would I replace the attenuator?2026-01-06, 21:13:22 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:12:34 Notice (6) US profile assignment change. US Chan ID: 6; Previous Profile: 13; New Profile: 9 13.;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:41 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:39 Warning (5) Dynamic Range Window violation 2026-01-06, 21:11:39 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:39 Warning (5) Dynamic Range Window violation 2026-01-06, 21:11:39 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:38 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:32 Notice (6) DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:30 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:25 Notice (6) TLV-11 - unrecognized OID;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; Time Not Established Warning (5) DHCP WARNING - Non-critical field invalid in response ;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:07:11 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:02:09 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:02:05 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:02:05 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 20:58:49 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 20:58:49 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1;
2026-01-06, 21:13:22 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:12:34 Notice (6) US profile assignment change. US Chan ID: 6; Previous Profile: 13; New Profile: 9 13.;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:41 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:39 Warning (5) Dynamic Range Window violation 2026-01-06, 21:11:39 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:39 Warning (5) Dynamic Range Window violation 2026-01-06, 21:11:39 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:38 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:32 Notice (6) DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:30 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:11:25 Notice (6) TLV-11 - unrecognized OID;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; Time Not Established Warning (5) DHCP WARNING - Non-critical field invalid in response ;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1; Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv4 Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; 2026-01-06, 21:07:13 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:72:2f:60;CMTS-MAC=04:76:b0:24:4c:ef;CM-QOS=1.1;CM-VER=3.1;
