NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Solved
Lower speeds after switch to CM1000
I can only get 33Mbps up and down after switching to CM1000 firmware V6.01.02 and Comcast Xfinity 1000Mbps plan. I need help interpreting these values to know if my problem is the modem or my service...
A screen snip will show all the values. I don't quite see them all. But from what I can see, there's issues with your line. To many errors, not all the channels are locked, ofdm issues, and your power is way out of spec. You should be within 3dBmV of each other.
A couple things you can try.
1. remove all splitters, amplifiers, attenuators from your line.
2. preferrably hook up directly where the coax enters your house. This removes the chance that its the wiring internal to your home.
3. inspect your line in the house if you can't move the modem to the entrance. Check for kinks, corrosion, bad/cheap connectors, wear to the coax, and loose connectors.
If you do all that and your connection is still looking like it is, have your isp inspect your line. You're responsible for it after it enters the home which is why I recommend direct connecting it.It removes the chance of the problem being in your home. ISP's really like to blame the issue on the wiring within the home.
Downstream Bonded Channels (Partial Service)
| Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR / MER | Unerrored Codewords | Correctable Codewords | Uncorrectable Codewords |
| 1 | Locked | QAM256 | 37 | 651000000 Hz | -3.6 dBmV | 38.8 dB | 29043116 | 80 | 420 |
| 2 | Locked | QAM256 | 9 | 483000000 Hz | -0.4 dBmV | 39.2 dB | 25038117 | 897 | 0 |
| 3 | Locked | QAM256 | 10 | 489000000 Hz | -0.3 dBmV | 38.4 dB | 27387075 | 1481 | 4950 |
| 4 | Locked | QAM256 | 11 | 495000000 Hz | -0.4 dBmV | 33.9 dB | 27418418 | 1616 | 4874 |
| 5 | Locked | QAM256 | 12 | 501000000 Hz | -0.8 dBmV | 35.6 dB | 27426064 | 1087 | 4917 |
| 6 | Locked | QAM256 | 13 | 507000000 Hz | -1.7 dBmV | 33.7 dB | 27433031 | 1164 | 4869 |
| 7 | Locked | QAM256 | 14 | 513000000 Hz | -2.1 dBmV | 34.6 dB | 27440052 | 1110 | 4864 |
| 8 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 9 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 10 | Locked | QAM256 | 17 | 531000000 Hz | -2.3 dBmV | 28.1 dB | 27263782 | 186097 | 4555 |
| 11 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 12 | Locked | QAM256 | 19 | 543000000 Hz | -1.4 dBmV | 31.9 dB | 27455832 | 1087 | 4981 |
| 13 | Locked | QAM256 | 20 | 549000000 Hz | -1.4 dBmV | 39.8 dB | 27464252 | 1282 | 5757 |
| 14 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
| 15 | Locked | QAM256 | 22 | 561000000 Hz | -1.1 dBmV | 31.9 dB | 27381173 | 83957 | 4135 |
| 16 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
17 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0 18 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0 19 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0 20 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0 21 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0 22 Locked QAM256 29 603000000 Hz -2.9 dBmV 32.4 dB 25221789 107 510 23 Locked QAM256 30 609000000 Hz -3.7 dBmV 39.4 dB 27470916 1130 5510 24 Locked QAM256 31 615000000 Hz -3.9 dBmV 40.6 dB 25242970 96 465 25 Locked QAM256 32 621000000 Hz -3.7 dBmV 37.6 dB 27486381 1204 5375 26 Locked QAM256 33 627000000 Hz -3.2 dBmV 38.2 dB 27486259 1063 4902 27 Locked QAM256 34 633000000 Hz -3.1 dBmV 40.9 dB 27494924 1111 4759 28 Locked QAM256 35 639000000 Hz -3.3 dBmV 40.4 dB 27535724 1219 5314 29 Locked QAM256 36 645000000 Hz -3.5 dBmV 39.5 dB 27567960 1006 4867 30 Locked QAM256 38 657000000 Hz -4.3 dBmV 38.5 dB 27514176 1121 5343 31 Locked QAM256 39 663000000 Hz -5.1 dBmV 37.6 dB 27520979 1059 4916 32 Locked QAM256 40 669000000 Hz -6.4 dBmV 38.3 dB 27518723 1174 5292 Upstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power 1 Locked ATDMA 1 35800000 Hz 50.5 dBmV 2 Locked ATDMA 2 29400000 Hz 54.0 dBmV 3 Locked ATDMA 3 23000000 Hz 50.5 dBmV 4 Locked ATDMA 4 16600000 Hz 50.0 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 OFDM Channels 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, 1 159 690000000 Hz -8.1 dBmV 4.5 dB 1246 ~ 2849 337796 4639 333301 2 Not Locked 0 0 0 Hz 3.2 dBmV 0.0 dB 0 ~ 4095 0 0 0 Upstream OFDMA Channels 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 A screen snip will show all the values. I don't quite see them all. But from what I can see, there's issues with your line. To many errors, not all the channels are locked, ofdm issues, and your power is way out of spec. You should be within 3dBmV of each other.
A couple things you can try.
1. remove all splitters, amplifiers, attenuators from your line.
2. preferrably hook up directly where the coax enters your house. This removes the chance that its the wiring internal to your home.
3. inspect your line in the house if you can't move the modem to the entrance. Check for kinks, corrosion, bad/cheap connectors, wear to the coax, and loose connectors.
If you do all that and your connection is still looking like it is, have your isp inspect your line. You're responsible for it after it enters the home which is why I recommend direct connecting it.It removes the chance of the problem being in your home. ISP's really like to blame the issue on the wiring within the home.