Hi all. My ISP is Spectrum and they sent their own modem recently to replace my CM500 because it's going to be outdated soon. I wanted to stick with my own equipment so I had recently purchased a CM1000v2 modem and set it up to replace my CM500. My rated speeds that I pay for are 350 download and 30 upload. With my CM500, I would consistently get around 330-350 down and 25 up. I should add that I also connect through the Netgear R6400 (AC 1750) router as well with the latest stock firmware. I would get the same speeds regardless of being wired via ethernet to the router or modem. With the new CM1000v2, I get a maximum download of 70 and an upload of 5. It usually fluctuates around 50 down and 4.5 up. This still happens even if I run a speed test wired directly into the modem. Spectrum was no help and said they noticed no issues. My coax is fairly new and also has a PoE filter to reduce the noise. I don't believe the connection has a splitter as it goes into a box with the neighbors right outside my building. Speed tests show slow speeds on multiple desktops running Windows 10 as well as two Android phones. Below I will drop info from the modem page.
TL;DR, switching from CM500 to CM1000v2 dropped my download from 350 to about 50 and upload from 25 to about 5. I have tried hard resetting and Spectrum says it provisioned perfectly with no issues. I ran a speed test for my CM500 before I made the switch to compare and the lowered speeds were instantaneous after setting up the new modem. Help.
| Hardware Version | 2.02 |
|
| Firmware Version | V1.01.03 |
<tabindex=-1>Startup Procedure</tabindex=-1>
| Procedure | Status | Comment |
| Acquire Downstream Channel | 705000000 Hz | Locked |
| Connectivity State | OK | Operational |
| Boot State | OK | Operational |
| Security | Enable | BPI+ |
| IP Provisioning Mode | Honor MDD | IPv4 only |
<tabindex=-1>Downstream Bonded Channels</tabindex=-1>
| Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR / MER | Unerrored Codewords | Correctable Codewords | Uncorrectable Codewords |
| 1 | Locked | QAM256 | 31 | 705000000 Hz | -4.0 dBmV | 42.1 dB | 2467591198 | 0 | 0 |
| 2 | Locked | QAM256 | 1 | 693000000 Hz | -4.1 dBmV | 42.2 dB | 2466791097 | 0 | 0 |
| 3 | Locked | QAM256 | 2 | 525000000 Hz | -0.4 dBmV | 44.0 dB | 2466799337 | 0 | 0 |
| 4 | Locked | QAM256 | 3 | 531000000 Hz | -0.4 dBmV | 44.0 dB | 2466802649 | 0 | 0 |
| 5 | Locked | QAM256 | 4 | 537000000 Hz | -0.3 dBmV | 44.0 dB | 2466806015 | 0 | 0 |
| 6 | Locked | QAM256 | 5 | 543000000 Hz | -0.6 dBmV | 44.0 dB | 2466809256 | 0 | 0 |
| 7 | Locked | QAM256 | 6 | 549000000 Hz | -0.6 dBmV | 44.0 dB | 2466815710 | 0 | 0 |
| 8 | Locked | QAM256 | 7 | 555000000 Hz | -0.5 dBmV | 43.9 dB | 2466817248 | 0 | 0 |
| 9 | Locked | QAM256 | 8 | 561000000 Hz | -0.5 dBmV | 44.1 dB | 2466821414 | 0 | 0 |
| 10 | Locked | QAM256 | 9 | 567000000 Hz | -0.6 dBmV | 44.0 dB | 2466840678 | 0 | 0 |
| 11 | Locked | QAM256 | 10 | 573000000 Hz | -0.5 dBmV | 44.0 dB | 2466845030 | 0 | 0 |
| 12 | Locked | QAM256 | 11 | 579000000 Hz | -0.8 dBmV | 43.9 dB | 2466848578 | 0 | 0 |
| 13 | Locked | QAM256 | 12 | 585000000 Hz | -0.8 dBmV | 43.9 dB | 2466852602 | 0 | 0 |
| 14 | Locked | QAM256 | 13 | 591000000 Hz | -0.8 dBmV | 43.9 dB | 2466855714 | 0 | 0 |
| 15 | Locked | QAM256 | 14 | 597000000 Hz | -0.6 dBmV | 43.9 dB | 2466859755 | 0 | 0 |
| 16 | Locked | QAM256 | 15 | 603000000 Hz | -0.9 dBmV | 43.7 dB | 2466863534 | 0 | 0 |
| 17 | Locked | QAM256 | 16 | 609000000 Hz | -1.1 dBmV | 43.5 dB | 2466868836 | 0 | 0 |
| 18 | Locked | QAM256 | 17 | 615000000 Hz | -1.2 dBmV | 43.5 dB | 2466870519 | 0 | 0 |
| 19 | Locked | QAM256 | 18 | 621000000 Hz | -1.2 dBmV | 43.0 dB | 2466873965 | 0 | 0 |
| 20 | Locked | QAM256 | 19 | 627000000 Hz | -1.3 dBmV | 43.5 dB | 2466877671 | 0 | 0 |
| 21 | Locked | QAM256 | 20 | 633000000 Hz | -1.7 dBmV | 43.2 dB | 2466882302 | 0 | 0 |
| 22 | Locked | QAM256 | 21 | 639000000 Hz | -1.7 dBmV | 43.2 dB | 2466886261 | 0 | 0 |
| 23 | Locked | QAM256 | 22 | 645000000 Hz | -2.0 dBmV | 43.0 dB | 2466890704 | 0 | 0 |
| 24 | Locked | QAM256 | 24 | 657000000 Hz | -2.4 dBmV | 42.9 dB | 2466892953 | 0 | 0 |
| 25 | Locked | QAM256 | 25 | 663000000 Hz | -2.8 dBmV | 42.7 dB | 2466896704 | 0 | 0 |
| 26 | Locked | QAM256 | 26 | 669000000 Hz | -3.4 dBmV | 42.4 dB | 2466899306 | 0 | 0 |
| 27 | Locked | QAM256 | 27 | 675000000 Hz | -3.7 dBmV | 40.5 dB | 2466903963 | 0 | 0 |
| 28 | Locked | QAM256 | 28 | 681000000 Hz | -4.1 dBmV | 42.1 dB | 2466905636 | 0 | 0 |
| 29 | Locked | QAM256 | 29 | 687000000 Hz | -4.1 dBmV | 42.0 dB | 2466909334 | 0 | 0 |
| 30 | Locked | QAM256 | 30 | 699000000 Hz | -4.5 dBmV | 41.9 dB | 2466912440 | 0 | 0 |
| 31 | Locked | QAM256 | 32 | 519000000 Hz | -0.4 dBmV | 43.8 dB | 2466910294 | 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 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV |
| 2 | Locked | ATDMA | 3 | 30600000 Hz | 47.3 dBmV |
| 3 | Locked | ATDMA | 4 | 37000000 Hz | 47.0 dBmV |
| 4 | Not Locked | Unknown | 0 | 0 Hz | 0.0 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 |
<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 | 33 | 380000000 Hz | -0.5 dBmV | 43.0 dB | 1108 ~ 2987 | 9660971394 | 648375194 | 0 |
| 2 | Not Locked | 0 | 0 | 0 Hz | -2.6 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 | Locked | 3, 4, 11, 12, 13 | 1 | 6025000 Hz | 45.5 dBmV |
| 2 | Not Locked | 3, 4, 11, 12, 13 | 0 | 0 Hz | 0.0 dBmV |
| Time | Priority | Description |
| 2022-05-20, 00:13:58 | Notice (6) | US profile assignment change. US Chan ID: 8; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
| 2022-05-20, 00:03:55 | Notice (6) | US profile assignment change. US Chan ID: 8; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
| 2022-05-19, 23:22:14 | Notice (6) | US profile assignment change. US Chan ID: 8; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
| 2022-05-19, 23:12:11 | Notice (6) | US profile assignment change. US Chan ID: 8; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
| 2022-05-19, 18:39:13 | Notice (6) | US profile assignment change. US Chan ID: 8; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
| 2022-05-19, 18:29:10 | Notice (6) | US profile assignment change. US Chan ID: 8; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
| 2022-05-19, 15:47:13 | Notice (6) | US profile assignment change. US Chan ID: 8; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
| 2022-05-19, 15:37:10 | Notice (6) | US profile assignment change. US Chan ID: 8; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
| 2022-05-19, 13:37:04 | Notice (6) | DHCP Renew - lease parameters Time Protocol Servers modified;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
| 2022-05-19, 13:37:04 | Error (4) | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=9c:c9:eb:40:49:78;CMTS-MAC=00:01:5c:69:b0:6f;CM-QOS=1.1;CM-VER=3.1; |
