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Forum Discussion
CM3000 Not achieving high download speeds
I purchased the CM3000 a few weeks ago when my Comcast speeds were increased to 2000 Mbps. After 2 tech visits from Comcast my speeds from the modem do not exceed 800 or so Mbps even though they tes...
| Cable Diagnostic |
| Status: Good |
| Action: Your setup looks fine. If you can't access the internet, make sure you properly activated the modem. If modem has been activated and you still can't access the internet, contact your service provider for troubleshooting help. If you can access the internet but has other internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info. |
| CM Status: |
| Downstream Status: |
| Upstream Status: |
| ||
| 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. | ||
|
Startup Procedure
| Procedure | Status | Comment |
| Acquire Downstream Channel | 561000000 Hz | Locked |
| Connectivity State | OK | Operational |
| Boot State | OK | Operational |
| Security | Enabled | BPI+ |
| IP Provisioning Mode | Honor MDD | IPv6 only |
Downstream Bonded Channels
| Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR | Correctables | Uncorrectables |
| 1 | Locked | QAM256 | 28 | 561000000 Hz | -3.8 dBmV | 41.3 dB | 0 | 0 |
| 2 | Locked | QAM256 | 1 | 399000000 Hz | -2.2 dBmV | 42.6 dB | 0 | 0 |
| 3 | Locked | QAM256 | 2 | 405000000 Hz | -2.3 dBmV | 42.6 dB | 0 | 0 |
| 4 | Locked | QAM256 | 3 | 411000000 Hz | -2.4 dBmV | 42.2 dB | 0 | 0 |
| 5 | Locked | QAM256 | 4 | 417000000 Hz | -2.5 dBmV | 42.5 dB | 0 | 0 |
| 6 | Locked | QAM256 | 5 | 423000000 Hz | -2.6 dBmV | 42.4 dB | 0 | 0 |
| 7 | Locked | QAM256 | 6 | 429000000 Hz | -2.7 dBmV | 42.3 dB | 0 | 0 |
| 8 | Locked | QAM256 | 7 | 435000000 Hz | -2.7 dBmV | 42.3 dB | 0 | 0 |
| 9 | Locked | QAM256 | 8 | 441000000 Hz | -2.8 dBmV | 42.3 dB | 0 | 0 |
| 10 | Locked | QAM256 | 9 | 447000000 Hz | -2.7 dBmV | 42.2 dB | 0 | 0 |
| 11 | Locked | QAM256 | 10 | 453000000 Hz | -2.9 dBmV | 42.0 dB | 0 | 0 |
| 12 | Locked | QAM256 | 11 | 459000000 Hz | -2.9 dBmV | 42.0 dB | 0 | 0 |
| 13 | Locked | QAM256 | 12 | 465000000 Hz | -2.9 dBmV | 41.9 dB | 0 | 0 |
| 14 | Locked | QAM256 | 13 | 471000000 Hz | -2.9 dBmV | 41.9 dB | 0 | 0 |
| 15 | Locked | QAM256 | 14 | 477000000 Hz | -2.9 dBmV | 41.9 dB | 0 | 0 |
| 16 | Locked | QAM256 | 15 | 483000000 Hz | -3.0 dBmV | 41.8 dB | 0 | 0 |
| 17 | Locked | QAM256 | 16 | 489000000 Hz | -3.0 dBmV | 41.7 dB | 0 | 0 |
| 18 | Locked | QAM256 | 17 | 495000000 Hz | -3.1 dBmV | 41.7 dB | 0 | 0 |
| 19 | Locked | QAM256 | 18 | 501000000 Hz | -3.3 dBmV | 41.6 dB | 0 | 0 |
| 20 | Locked | QAM256 | 19 | 507000000 Hz | -3.3 dBmV | 41.6 dB | 0 | 0 |
| 21 | Locked | QAM256 | 20 | 513000000 Hz | -3.5 dBmV | 41.5 dB | 0 | 0 |
| 22 | Locked | QAM256 | 21 | 519000000 Hz | -3.5 dBmV | 41.5 dB | 0 | 0 |
| 23 | Locked | QAM256 | 22 | 525000000 Hz | -3.5 dBmV | 41.5 dB | 0 | 0 |
| 24 | Locked | QAM256 | 23 | 531000000 Hz | -3.6 dBmV | 41.4 dB | 0 | 0 |
| 25 | Locked | QAM256 | 24 | 537000000 Hz | -3.8 dBmV | 41.3 dB | 0 | 0 |
| 26 | Locked | QAM256 | 25 | 543000000 Hz | -3.8 dBmV | 41.3 dB | 0 | 0 |
| 27 | Locked | QAM256 | 26 | 549000000 Hz | -3.8 dBmV | 41.2 dB | 0 | 0 |
| 28 | Locked | QAM256 | 27 | 555000000 Hz | -3.8 dBmV | 41.3 dB | 0 | 0 |
| 29 | Locked | QAM256 | 29 | 567000000 Hz | -3.9 dBmV | 41.2 dB | 0 | 0 |
| 30 | Locked | QAM256 | 30 | 573000000 Hz | -3.9 dBmV | 41.1 dB | 0 | 0 |
| 31 | Locked | QAM256 | 31 | 579000000 Hz | -4.0 dBmV | 41.2 dB | 0 | 0 |
| 32 | Locked | QAM256 | 32 | 585000000 Hz | -4.0 dBmV | 41.1 dB | 0 | 0 |
Upstream Bonded Channels
| Channel | Lock Status | US Channel Type | Channel ID | Symbol Rate | Frequency | Power |
| 1 | Locked | ATDMA | 18 | 5120 Ksym/sec | 22800000 Hz | 40.5 dBmV |
| 2 | Locked | ATDMA | 17 | 5120 Ksym/sec | 16400000 Hz | 40.0 dBmV |
| 3 | Locked | ATDMA | 19 | 5120 Ksym/sec | 29200000 Hz | 41.0 dBmV |
| 4 | Locked | ATDMA | 20 | 5120 Ksym/sec | 35600000 Hz | 41.5 dBmV |
| 5 | Not Locked | Unknown | 0 | 0 | 0 | 0.0 dBmV |
| 6 | Not Locked | Unknown | 0 | 0 | 0 | 0.0 dBmV |
| 7 | Not Locked | Unknown | 0 | 0 | 0 | 0.0 dBmV |
| 8 | Not Locked | Unknown | 0 | 0 | 0 | 0.0 dBmV |
Downstream OFDM Channels
| Channel | Lock Status | Profile ID | Channel ID | Frequency | Power | SNR / MER | Active Subcarrier Number Range | Unerrored Codewords | Correctable Codewords | Uncorrectable Codewords |
| 1 | Locked | 0 ,1 ,2 ,3 | 193 | 722000000 Hz | -6.12 dBmV | 39.1 dB | 568 ~ 3527 | 54781480 | 53153247 | 0 |
| 2 | Locked | 0 ,1 ,2 ,3 | 194 | 957000000 Hz | -8.62 dBmV | 36.2 dB | 148 ~ 3947 | 55763400 | 51870750 | 0 |
Upstream OFDMA Channels
| Channel | Lock Status | Modulation / Profile ID | Channel ID | Frequency | Power |
| 1 | Locked | 12 ,13 | 43 | 36200000 Hz | 37.0 dBmV |
| 2 | Not Locked | 0 | 0 | 0 Hz | 0 dBmV |
Extended Upstream Transmit Power
Current System Time:Fri Sep 13 15:32:55 2024System Up Time:03:42:24
What is the name brand and model number of the router you have connected to your CM3000?
If need be, look on the name plate.