I have been experincing constant disconnects which seem to be getting more frequent and annoying. I am using a Netgear CM500 which is fairly new but experinced the same disconnects with my previous motorola surfboard modem. FInally had a tech come out today who said he dialed down the frequency level a little as it was high and should be fine. Disocnnects are still occuring several hours after and more frequent. A few weeks ago i disconnected the splitter and runnig the line straight to the modem but same issue. Also about a year ago i had comcast run a new line after they determined the line was not good.
I noticed in the modems error log the following throughout the day:
No Ranging Response received - T3 time-out
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received
Unicast Ranging Received Abort Response - Re-initializing
These are the frequency stats on the modem. I appreciate any advice.
Startup Procedure |
Procedure | Status | Comment | Acquire Downstream Channel | 579000000 Hz | Locked | Connectivity State | OK | Operational | Boot State | OK | Operational | Security | Enabled | BPI+ | IP Provisioning Mode | Honor MDD | honorMdd(4) |
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Downstream Bonded Channels |
Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR | Correctables | Uncorrectables | 1 | Locked | QAM256 | 25 | 579000000 Hz | 11.7 dBmV | 37 dB | 7507 | 0 | 2 | Locked | QAM256 | 26 | 585000000 Hz | 11.4 dBmV | 36.9 dB | 8835 | 0 | 3 | Locked | QAM256 | 27 | 591000000 Hz | 11.4 dBmV | 36.8 dB | 9976 | 0 | 4 | Locked | QAM256 | 28 | 597000000 Hz | 11.3 dBmV | 36.8 dB | 10124 | 0 | 5 | Locked | QAM256 | 29 | 603000000 Hz | 11.2 dBmV | 36.7 dB | 11700 | 0 | 6 | Locked | QAM256 | 30 | 609000000 Hz | 11.2 dBmV | 36.6 dB | 10995 | 0 | 7 | Locked | QAM256 | 31 | 615000000 Hz | 10.9 dBmV | 36.5 dB | 14178 | 0 | 8 | Locked | QAM256 | 32 | 621000000 Hz | 11 dBmV | 36.5 dB | 14887 | 0 | 9 | Locked | QAM256 | 33 | 627000000 Hz | 10.9 dBmV | 36.4 dB | 15172 | 0 | 10 | Locked | QAM256 | 34 | 633000000 Hz | 10.7 dBmV | 36.2 dB | 18390 | 0 | 11 | Locked | QAM256 | 35 | 639000000 Hz | 10.7 dBmV | 36.2 dB | 19561 | 0 | 12 | Locked | QAM256 | 36 | 645000000 Hz | 10.6 dBmV | 36.2 dB | 20871 | 0 | 13 | Locked | QAM256 | 37 | 651000000 Hz | 10.7 dBmV | 36.2 dB | 19764 | 0 | 14 | Locked | QAM256 | 38 | 657000000 Hz | 10.7 dBmV | 36.1 dB | 21112 | 0 | 15 | Locked | QAM256 | 39 | 663000000 Hz | 10.7 dBmV | 36.1 dB | 22516 | 0 | 16 | Locked | QAM256 | 40 | 669000000 Hz | 10.8 dBmV | 36.1 dB | 22778 | 0 |
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Upstream Bonded Channels |
Channel | Lock Status | US Channel Type | Channel ID | Symbol Rate | Frequency | Power | 1 | Locked | ATDMA | 10 | 5120 Ksym/sec | 29200000 Hz | 50 dBmV | 2 | Locked | ATDMA | 9 | 5120 Ksym/sec | 35600000 Hz | 50.5 dBmV | 3 | Locked | ATDMA | 11 | 5120 Ksym/sec | 22800000 Hz | 50.5 dBmV | 4 | Locked | ATDMA | 12 | 5120 Ksym/sec | 16400000 Hz | 49 dBmV |
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Extended Upstream Transmit Power |
Enable Extended Upstream Transmit Power |
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Current System Time:Sat Oct 24 18:21:50 2020 |
System Up Time:00:31:23 |
riehs
New Poster
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4 Messages
5 years ago
The tech was just out here this morning and he said he actually lowered the levels beacause they were too high. Regarding the splitters, as i mentioned already i have removed already which does not seem to have made any difference.
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EG
Expert
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111.4K Messages
5 years ago
In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test.
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
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EG
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111.4K Messages
5 years ago
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riehs
New Poster
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4 Messages
5 years ago
i guess so. where do i want that range to be within to have more stability.
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EG
Expert
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111.4K Messages
5 years ago
40 to 45 dB is preferred. Here are the specs;
Specification Min Max
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riehs
New Poster
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4 Messages
5 years ago
so the 40-45 db i imagine you are referring to the upstream? maybe the tech only adjusted the downstream as it seems closer to the 35 reccomended. are there any other values that look like they need to be adjusted?
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EG
Expert
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111.4K Messages
5 years ago
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