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Re: CM1100 - 3 Day Old, keeps disconnection with high upstream power, using Spectrum
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CM1100 - 3 Day Old, keeps disconnection with high upstream power, using Spectrum
Just got my modem 3 days ago and set it up. Had a Spectrum tech come out yesterday and took out extra splitters and checked all my signals. I don't think it made much a difference. My upstream power hovers around 51-52 dB so any flucutations to that spikes it over 53 dB and causes a T3 error and disconnect.
Almost every Spectrum rep wants to blame my for using my own equipment, even though I had this problem with my old modem and bought this modem to upgrade. I just had it re-provisioned this morning after a factory reset of the modem and the issue is still happening.
My coax is running straight from a grounding box to my outlet, then to a splitter that goes to my HD-DVR box and my modem. There was am amp there before that the tech took out yesterday; he said it was bad. However, before the tech visit and after, I did not see a noticable change in upstream power.
Is there anything I can do? Would exchanging the modem for another CM1100 have any difference? I'm not sure it would, as when there is connection, the model works great, but the disconnects happen sometimes every minute.
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Re: CM1100 - 3 Day Old, keeps disconnection with high upstream power, using Spectrum
The user of High Power signals on the line are probably one issue.
The CM1100 is a solid modem if the signals are set right. The ISP should know this.
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Re: CM1100 - 3 Day Old, keeps disconnection with high upstream power, using Spectrum
Modem 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. | |
|
Procedure | Status | Comment |
Acquire Downstream Channel | 777000000 Hz | Locked |
Connectivity State | OK | Operational |
Boot State | OK | Operational |
Security | Enable | BPI+ |
IP Provisioning Mode | Honor MDD | IPv4 only |
Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR / MER | Unerrored Codewords | Correctable Codewords | Uncorrectable Codewords |
1 | Locked | QAM256 | 28 | 777000000 Hz | -3.4 dBmV | 42.0 dB | 115624863 | 1960 | 2806 |
2 | Locked | QAM256 | 1 | 615000000 Hz | 0.2 dBmV | 43.6 dB | 114482630 | 4759 | 6042 |
3 | Locked | QAM256 | 2 | 621000000 Hz | 0.5 dBmV | 43.4 dB | 114480288 | 4755 | 5886 |
4 | Locked | QAM256 | 3 | 627000000 Hz | 0.4 dBmV | 43.8 dB | 114484903 | 4369 | 5681 |
5 | Locked | QAM256 | 4 | 633000000 Hz | -0.2 dBmV | 43.5 dB | 114488865 | 4134 | 5424 |
6 | Locked | QAM256 | 5 | 639000000 Hz | 0.0 dBmV | 43.7 dB | 114492659 | 4021 | 5240 |
7 | Locked | QAM256 | 6 | 645000000 Hz | 0.0 dBmV | 43.5 dB | 114495919 | 3917 | 5175 |
8 | Locked | QAM256 | 7 | 651000000 Hz | -0.2 dBmV | 43.4 dB | 114499612 | 3851 | 5067 |
9 | Locked | QAM256 | 8 | 657000000 Hz | -0.6 dBmV | 43.4 dB | 114502924 | 3654 | 4684 |
10 | Locked | QAM256 | 9 | 663000000 Hz | -0.8 dBmV | 43.3 dB | 114507932 | 3505 | 4461 |
11 | Locked | QAM256 | 10 | 669000000 Hz | -0.9 dBmV | 43.1 dB | 114512110 | 3517 | 4279 |
12 | Locked | QAM256 | 11 | 675000000 Hz | -1.5 dBmV | 42.6 dB | 114515786 | 3304 | 4310 |
13 | Locked | QAM256 | 12 | 681000000 Hz | -2.1 dBmV | 42.6 dB | 114519677 | 3317 | 4263 |
14 | Locked | QAM256 | 13 | 687000000 Hz | -1.7 dBmV | 42.6 dB | 114523325 | 3129 | 4266 |
15 | Locked | QAM256 | 14 | 693000000 Hz | -1.5 dBmV | 42.6 dB | 114526607 | 3181 | 4094 |
16 | Locked | QAM256 | 15 | 699000000 Hz | -1.7 dBmV | 42.5 dB | 114531887 | 3157 | 3861 |
17 | Locked | QAM256 | 16 | 705000000 Hz | -1.9 dBmV | 42.2 dB | 114535435 | 3072 | 4596 |
18 | Locked | QAM256 | 17 | 711000000 Hz | -1.4 dBmV | 42.3 dB | 114540112 | 2802 | 3708 |
19 | Locked | QAM256 | 18 | 717000000 Hz | -0.9 dBmV | 42.7 dB | 114544324 | 2655 | 3504 |
20 | Locked | QAM256 | 19 | 723000000 Hz | -1.5 dBmV | 42.6 dB | 114548196 | 2497 | 3442 |
21 | Locked | QAM256 | 20 | 729000000 Hz | -1.6 dBmV | 42.5 dB | 114552057 | 2464 | 3434 |
22 | Locked | QAM256 | 21 | 735000000 Hz | -1.4 dBmV | 42.9 dB | 114556020 | 2345 | 3271 |
23 | Locked | QAM256 | 22 | 741000000 Hz | -1.3 dBmV | 43.0 dB | 114560207 | 2126 | 3014 |
24 | Locked | QAM256 | 23 | 747000000 Hz | -1.9 dBmV | 42.8 dB | 114563759 | 2396 | 2999 |
25 | Locked | QAM256 | 24 | 753000000 Hz | -2.2 dBmV | 42.6 dB | 114567680 | 2027 | 3026 |
26 | Locked | QAM256 | 25 | 759000000 Hz | -1.9 dBmV | 42.8 dB | 114571795 | 2131 | 2969 |
27 | Locked | QAM256 | 26 | 765000000 Hz | -2.2 dBmV | 42.8 dB | 114575593 | 2062 | 2805 |
28 | Locked | QAM256 | 27 | 771000000 Hz | -2.7 dBmV | 42.4 dB | 114579916 | 2006 | 2881 |
29 | Locked | QAM256 | 29 | 783000000 Hz | -2.6 dBmV | 42.6 dB | 114603602 | 1911 | 2843 |
30 | Locked | QAM256 | 30 | 789000000 Hz | -2.3 dBmV | 42.7 dB | 114587995 | 1719 | 2595 |
31 | Locked | QAM256 | 31 | 795000000 Hz | -2.8 dBmV | 42.3 dB | 114591335 | 1689 | 2554 |
32 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
<Upstream Bonded Channels (Partial Service)<
Channel | Lock Status | Modulation | Channel ID | Frequency | Power |
1 | Locked | ATDMA | 1 | 17600000 Hz | 51.3 dBmV |
2 | Locked | ATDMA | 2 | 24000000 Hz | 52.8 dBmV |
3 | Locked | ATDMA | 3 | 30400000 Hz | 58.8 dBmV |
4 | Locked | ATDMA | 4 | 36800000 Hz | 53.3 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 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, 2, 255 | 159 | 848000000 Hz | -3.0 dBmV | 39.8 dB | 1108 ~ 2987 | 301281835 | 210154739 | 25 |
2 | Not Locked | 0, 255 | 0 | 0 Hz | 1.9 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 |
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Re: CM1100 - 3 Day Old, keeps disconnection with high upstream power, using Spectrum
The 58dbmv would cause issues on the line.
Spectrum would need to recheck the line. They fight checking lines.
I've actually had to rent one of their modems to prove to them it wasn't the "third party" device and get them to fix a line. Then once its fixed, going back to my own modem.
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Re: CM1100 - 3 Day Old, keeps disconnection with high upstream power, using Spectrum
So a tech came today and checked everything from the pole drop to the modem line. Replaced pole connectors, the tech who came yesreday forgot to crimp a fitting smdh.
However, there is an issue with the modem too.
I still have my old modem so I hooked and rehooked it up to compare the 12 year old SBG6580 and the 3 day old CM1100.
Why is there an extra 2-3 dBmV on the CM1100? Is this normal or do I have a bad modem?
SBG6580:
Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR | Corrected | Uncorrectables |
1 | Locked | QAM256 | 1 | 615000000 Hz | 3.3 dBmV | 42.0 dB | 0 | 0 |
2 | Locked | QAM256 | 2 | 621000000 Hz | 3.3 dBmV | 42.5 dB | 0 | 0 |
3 | Locked | QAM256 | 3 | 627000000 Hz | 3.4 dBmV | 42.0 dB | 0 | 0 |
4 | Locked | QAM256 | 4 | 633000000 Hz | 2.9 dBmV | 41.9 dB | 0 | 0 |
5 | Locked | QAM256 | 5 | 639000000 Hz | 2.5 dBmV | 41.9 dB | 0 | 0 |
6 | Locked | QAM256 | 6 | 645000000 Hz | 2.9 dBmV | 42.0 dB | 0 | 0 |
7 | Locked | QAM256 | 7 | 651000000 Hz | 2.6 dBmV | 42.0 dB | 0 | 0 |
8 | Locked | QAM256 | 8 | 657000000 Hz | 2.2 dBmV | 41.4 dB | 0 | 0 |
Channel | Lock Status | US Channel Type | Channel ID | Symbol Rate | Frequency | Power |
1 | Locked | ATDMA | 2 | 5120 Ksym/sec | 24000000 Hz | 47.0 dBmV |
2 | Locked | ATDMA | 1 | 5120 Ksym/sec | 17600000 Hz | 46.2 dBmV |
3 | Locked | ATDMA | 3 | 5120 Ksym/sec | 30400000 Hz | 47.7 dBmV |
4 | Locked | ATDMA | 4 | 5120 Ksym/sec | 36800000 Hz | 48.2 dBmV |
CM1100:
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 | 759000000 Hz | Locked |
Connectivity State | OK | Operational |
Boot State | OK | Operational |
Security | Enable | BPI+ |
IP Provisioning Mode | Honor MDD | IPv4 only |
Downstream Bonded Channels
Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR / MER | Unerrored Codewords | Correctable Codewords | Uncorrectable Codewords |
1 | Locked | QAM256 | 25 | 759000000 Hz | 0.0 dBmV | 40.5 dB | 62683378 | 0 | 0 |
2 | Locked | QAM256 | 1 | 615000000 Hz | 2.1 dBmV | 43.3 dB | 61724613 | 0 | 0 |
3 | Locked | QAM256 | 2 | 621000000 Hz | 2.2 dBmV | 43.3 dB | 61727864 | 0 | 0 |
4 | Locked | QAM256 | 3 | 627000000 Hz | 2.0 dBmV | 43.2 dB | 61731617 | 0 | 0 |
5 | Locked | QAM256 | 4 | 633000000 Hz | 1.5 dBmV | 42.9 dB | 61734745 | 0 | 0 |
6 | Locked | QAM256 | 5 | 639000000 Hz | 1.6 dBmV | 43.1 dB | 61736552 | 0 | 0 |
7 | Locked | QAM256 | 6 | 645000000 Hz | 1.4 dBmV | 43.0 dB | 61741901 | 0 | 0 |
8 | Locked | QAM256 | 7 | 651000000 Hz | 1.2 dBmV | 42.7 dB | 61746046 | 0 | 0 |
9 | Locked | QAM256 | 8 | 657000000 Hz | 1.1 dBmV | 42.7 dB | 61749297 | 0 | 0 |
10 | Locked | QAM256 | 9 | 663000000 Hz | 0.9 dBmV | 42.4 dB | 61752859 | 0 | 0 |
11 | Locked | QAM256 | 10 | 669000000 Hz | 0.9 dBmV | 42.4 dB | 61756324 | 0 | 0 |
12 | Locked | QAM256 | 11 | 675000000 Hz | 0.5 dBmV | 41.6 dB | 61761621 | 0 | 0 |
13 | Locked | QAM256 | 12 | 681000000 Hz | 0.3 dBmV | 42.0 dB | 61764778 | 0 | 0 |
14 | Locked | QAM256 | 13 | 687000000 Hz | 0.6 dBmV | 41.6 dB | 61768533 | 0 | 0 |
15 | Locked | QAM256 | 14 | 693000000 Hz | 0.6 dBmV | 41.0 dB | 61773030 | 0 | 0 |
16 | Locked | QAM256 | 15 | 699000000 Hz | 0.3 dBmV | 40.6 dB | 61776696 | 0 | 0 |
17 | Locked | QAM256 | 16 | 705000000 Hz | 0.0 dBmV | 40.1 dB | 61778387 | 211 | 867 |
18 | Locked | QAM256 | 17 | 711000000 Hz | 0.4 dBmV | 39.8 dB | 61783098 | 118 | 494 |
19 | Locked | QAM256 | 18 | 717000000 Hz | 0.7 dBmV | 40.0 dB | 61787685 | 0 | 0 |
20 | Locked | QAM256 | 19 | 723000000 Hz | 0.1 dBmV | 40.3 dB | 61791148 | 0 | 0 |
21 | Locked | QAM256 | 20 | 729000000 Hz | -0.1 dBmV | 41.3 dB | 61794421 | 0 | 0 |
22 | Locked | QAM256 | 21 | 735000000 Hz | 0.1 dBmV | 42.2 dB | 61798302 | 0 | 0 |
23 | Locked | QAM256 | 22 | 741000000 Hz | 0.3 dBmV | 41.6 dB | 61802556 | 0 | 0 |
24 | Locked | QAM256 | 23 | 747000000 Hz | -0.2 dBmV | 40.7 dB | 61805961 | 0 | 0 |
25 | Locked | QAM256 | 24 | 753000000 Hz | -0.3 dBmV | 40.4 dB | 61810009 | 1 | 0 |
26 | Locked | QAM256 | 26 | 765000000 Hz | -0.1 dBmV | 40.6 dB | 61813549 | 0 | 0 |
27 | Locked | QAM256 | 27 | 771000000 Hz | -0.6 dBmV | 40.4 dB | 61817160 | 0 | 0 |
28 | Locked | QAM256 | 28 | 777000000 Hz | -1.3 dBmV | 40.4 dB | 61810387 | 3794 | 6724 |
29 | Locked | QAM256 | 29 | 783000000 Hz | -0.5 dBmV | 40.9 dB | 61820554 | 2265 | 1617 |
30 | Locked | QAM256 | 30 | 789000000 Hz | -0.2 dBmV | 40.9 dB | 61825204 | 0 | 0 |
31 | Locked | QAM256 | 31 | 795000000 Hz | -0.9 dBmV | 40.6 dB | 61827802 | 0 | 0 |
32 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
Upstream Bonded Channels
Channel | Lock Status | Modulation | Channel ID | Frequency | Power |
1 | Locked | ATDMA | 1 | 17600000 Hz | 49.5 dBmV |
2 | Locked | ATDMA | 2 | 24000000 Hz | 50.5 dBmV |
3 | Locked | ATDMA | 3 | 30400000 Hz | 50.5 dBmV |
4 | Locked | ATDMA | 4 | 36800000 Hz | 51.0 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, 2, 255 | 159 | 848000000 Hz | -1.0 dBmV | 39.5 dB | 1108 ~ 2987 | 161967520 | 111423613 | 0 |
2 | Not Locked | 0, 255 | 0 | 0 Hz | 5.5 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 |
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Re: CM1100 - 3 Day Old, keeps disconnection with high upstream power, using Spectrum
Your signal power levels are entirely within spec now. It could be because you're going from 2 different manufacturers. or going from a 8x4 modem to a 32x8 modem with docsis 3.1.
tough to say exactly.
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Re: CM1100 - 3 Day Old, keeps disconnection with high upstream power, using Spectrum
Take the CM modem back and get it replaced. Possible faulty modem you have.
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