NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
CM1000 CM-Status Messages an MDD Message Timeout
Hello, I've been trying to troubleshoot this problem for a couple of days now. I currently have Xfinity as my ISP and recently decided to stop paying $14 monthly for the xfinity modem. I bought a CM1...
Please post a copy and paste of the modems connection status page.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
| Frequency start Value | |
| This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. | |
|
<tabindex=-1>Startup Procedure</tabindex=-1>
| Procedure | Status | Comment |
| Acquire Downstream Channel | 399000000 Hz | Locked |
| Connectivity State | OK | Operational |
| Boot State | OK | Operational |
| Security | Enable | BPI+ |
| IP Provisioning Mode | Honor MDD | IPv6 only |
<tabindex=-1>Downstream Bonded Channels (Partial Service)</tabindex=-1>
| Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR / MER | Unerrored Codewords | Correctable Codewords | Uncorrectable Codewords |
| 1 | Locked | QAM256 | 42 | 399000000 Hz | -5.1 dBmV | 41.4 dB | 467646725 | 0 | 0 |
| 2 | Locked | QAM256 | 1 | 453000000 Hz | -4.6 dBmV | 40.8 dB | 466618291 | 0 | 0 |
| 3 | Locked | QAM256 | 2 | 459000000 Hz | -6.3 dBmV | 40.6 dB | 466621063 | 5 | 0 |
| 4 | Locked | QAM256 | 3 | 465000000 Hz | -7.0 dBmV | 40.3 dB | 466625586 | 30 | 0 |
| 5 | Locked | QAM256 | 4 | 471000000 Hz | -8.5 dBmV | 39.7 dB | 466629763 | 26 | 0 |
| 6 | Locked | QAM256 | 5 | 477000000 Hz | -9.5 dBmV | 39.4 dB | 466633144 | 21 | 0 |
| 7 | Locked | QAM256 | 6 | 483000000 Hz | -10.0 dBmV | 38.9 dB | 466637072 | 38 | 0 |
| 8 | Locked | QAM256 | 7 | 489000000 Hz | -10.7 dBmV | 38.6 dB | 466643316 | 15 | 0 |
| 9 | Locked | QAM256 | 8 | 495000000 Hz | -10.5 dBmV | 35.4 dB | 466646500 | 46 | 0 |
| 10 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 11 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 12 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 13 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 14 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 15 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 16 | Locked | QAM256 | 15 | 543000000 Hz | -11.6 dBmV | 30.3 dB | 357763593 | 106025368 | 2096621 |
| 17 | Locked | QAM256 | 16 | 549000000 Hz | -10.7 dBmV | 36.3 dB | 466672312 | 43 | 0 |
| 18 | Locked | QAM256 | 17 | 555000000 Hz | -9.9 dBmV | 38.2 dB | 466684367 | 16 | 0 |
| 19 | Locked | QAM256 | 18 | 561000000 Hz | -8.4 dBmV | 39.7 dB | 466697085 | 1 | 0 |
| 20 | Locked | QAM256 | 19 | 567000000 Hz | -7.3 dBmV | 38.7 dB | 466700960 | 0 | 0 |
| 21 | Locked | QAM256 | 20 | 573000000 Hz | -6.7 dBmV | 37.3 dB | 466705999 | 21 | 0 |
| 22 | Locked | QAM256 | 21 | 579000000 Hz | -6.4 dBmV | 27.2 dB | 279485405 | 18729524 | 2185855 |
| 23 | Locked | QAM256 | 22 | 585000000 Hz | -7.0 dBmV | 32.0 dB | 466705276 | 6174 | 0 |
| 24 | Locked | QAM256 | 23 | 591000000 Hz | -7.7 dBmV | 28.4 dB | 183873710 | 55335743 | 10587227 |
| 25 | Locked | QAM256 | 38 | 423000000 Hz | -4.1 dBmV | 41.5 dB | 466678966 | 0 | 0 |
| 26 | Locked | QAM256 | 39 | 429000000 Hz | -3.4 dBmV | 41.5 dB | 466682307 | 0 | 0 |
| 27 | Locked | QAM256 | 40 | 435000000 Hz | -2.8 dBmV | 41.8 dB | 466686571 | 0 | 0 |
| 28 | Locked | QAM256 | 41 | 441000000 Hz | -2.7 dBmV | 41.6 dB | 466690754 | 0 | 0 |
| 29 | Locked | QAM256 | 43 | 405000000 Hz | -5.0 dBmV | 41.3 dB | 466695004 | 0 | 0 |
| 30 | Locked | QAM256 | 44 | 411000000 Hz | -4.7 dBmV | 41.3 dB | 466697241 | 0 | 0 |
| 31 | Locked | QAM256 | 45 | 417000000 Hz | -4.4 dBmV | 41.5 dB | 466700879 | 0 | 0 |
| 32 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
<tabindex=-1>Upstream Bonded Channels</tabindex=-1>
| Channel | Lock Status | Modulation | Channel ID | Frequency | Power |
| 1 | Locked | ATDMA | 1 | 35600000 Hz | 52.5 dBmV |
| 2 | Locked | ATDMA | 2 | 29200000 Hz | 54.3 dBmV |
| 3 | Locked | ATDMA | 3 | 22800000 Hz | 55.0 dBmV |
| 4 | Locked | ATDMA | 4 | 16400000 Hz | 55.5 dBmV |
| 5 | Locked | ATDMA | 5 | 39600000 Hz | 49.8 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 |
<tabindex=-1>Downstream OFDM Channels</tabindex=-1>
| Channel | Lock Status | Modulation / Profile ID | Channel ID | Frequency | Power | SNR / MER | Active Subcarrier Number Range | Unerrored Codewords | Correctable Codewords | Uncorrectable Codewords |
| 1 | Locked | 0, 1, 2, 3 | 37 | 722000000 Hz | -13.3 dBmV | 20.5 dB | 1228 ~ 2867 | 168265294 | 26179906 | 142083493 |
| 2 | Not Locked | 0 | 0 | 0 Hz | -5.5 dBmV | 0.0 dB | 0 ~ 4095 | 0 | 0 | 0 |
<tabindex=-1>Upstream OFDMA Channels</tabindex=-1>
| Channel | Lock Status | Modulation / Profile ID | Channel ID | Frequency | Power |
| 1 | Not Locked | Unknown | 0 | 0 Hz | 0 dBmV |
| 2 | Not Locked | Unknown | 0 | 0 Hz | 0 dBmV |
Current System Time: Wed Jul 14 23:02:36 2021 System Up Time: 2:51:53
I will contact my ISP tomorrow and will give an update here.
Ask them why channels 10 thru 15 are not locked in...I believe they should be.
Your power levels are all over the place and you have a ton of errors.
Make sure to remove anything from the lines including splitters, signal attenuators, amplifiers.
Check for kinks, bad connections, old/corroded/cheap connectors and cables. remove them if you do.
Preferrably, move the modem to right where the coax enters the home to prevent wiring internal to the home being the issue.
Many isp's will charge you for fixing a wireless problem inside the home.
then try it.
your line is quite messed up. ISP needs to really fix TONs of Uncorrectable errors and multiple channels not able to sync as well.
