Here to confirm the problem is on Comcasts end and need to have a tech visit. Again...Do not want to deal with customer service telling me to keep restarting the modem.....over....and over....
New customer, less than a month, already very displeased for background.
I have started to read around but still not sure what I am looking for: all connections that I can access are tight, Comcast tech removed amplifier from prior instalation, replaced splitter with 5-1002 MHz unit. No other uncessary splitters.
Here is my Motorola MB7621 information after a few resets already today:
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| Startup Step | Status | Comment |
| | Acquire Downstream Channel | 429000000 Hz | Locked |
| | Upstream Connection | OK | Operational |
| | Boot State | OK | Operational |
| | Configuration File | OK | d11_m_mb7621_speedtierextreme2_c01.cm |
| | Security | Enabled | BPI+ |
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| System Up Time | 0 days 00h:16m:33s | |
| | Network Access | Allowed | |
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| Downstream Bonded Channels | | |
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| Channel | Lock Status | Modulation | Channel ID | Freq. (MHz) | Pwr (dBmV) | SNR (dB) | Corrected | Uncorrected | | 1 | Locked | QAM256 | 1 | 429.0 | -6.7 | 40.0 | 0 | 0 | | 2 | Locked | QAM256 | 2 | 435.0 | -7.0 | 39.8 | 0 | 0 | | 3 | Locked | QAM256 | 3 | 447.0 | -7.2 | 39.4 | 0 | 0 | | 4 | Locked | QAM256 | 4 | 453.0 | -7.1 | 38.0 | 0 | 0 | | 5 | Locked | QAM256 | 5 | 459.0 | -7.2 | 39.6 | 0 | 0 | | 6 | Locked | QAM256 | 6 | 465.0 | -7.5 | 39.3 | 0 | 0 | | 7 | Locked | QAM256 | 7 | 471.0 | -8.0 | 38.7 | 0 | 0 | | 8 | Locked | QAM256 | 8 | 477.0 | -7.8 | 39.5 | 0 | 0 | | 9 | Locked | QAM256 | 9 | 483.0 | -7.8 | 39.5 | 0 | 0 | | 10 | Locked | QAM256 | 10 | 489.0 | -8.1 | 39.5 | 0 | 0 | | 11 | Locked | QAM256 | 11 | 495.0 | -8.1 | 39.5 | 0 | 0 | | 12 | Locked | QAM256 | 12 | 501.0 | -7.8 | 36.4 | 0 | 0 | | 13 | Locked | QAM256 | 13 | 507.0 | -7.9 | 35.8 | 0 | 0 | | 14 | Locked | QAM256 | 14 | 513.0 | -8.6 | 36.8 | 0 | 0 | | 15 | Locked | QAM256 | 15 | 519.0 | -9.2 | 37.4 | 0 | 0 | | 16 | Locked | QAM256 | 16 | 525.0 | -9.2 | 0.0 | 2186 | 11529 | | 17 | Not Locked | Unknown | 0 | 531.0 | 0.0 | 0.0 | 5900887 | 738348 | | 18 | Not Locked | Unknown | 0 | 537.0 | 0.0 | 0.0 | 1790735 | 843404 | | 19 | Locked | QAM256 | 19 | 543.0 | -8.7 | 27.9 | 838814 | 178412 | | 20 | Locked | QAM256 | 20 | 549.0 | -8.5 | 32.9 | 0 | 0 | | 21 | Not Locked | Unknown | 0 | 555.0 | 0.0 | 0.0 | 1529479 | 980320 | | 22 | Not Locked | Unknown | 0 | 561.0 | 0.0 | 0.0 | 4067669 | 2626736 | | 23 | Locked | QAM256 | 23 | 567.0 | -8.1 | 31.6 | 971 | 0 | | 24 | Locked | QAM256 | 24 | 573.0 | -7.7 | 31.3 | 151 | 0 | | Total | | | | | | | 14130892 | 5378749 |
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| Channel | Lock Status | Channel Type | Channel ID | Symb. Rate (Ksym/sec) | Freq. (MHz) | Pwr (dBmV) | | 1 | Locked | ATDMA | 2 | 5120 | 29.2 | 49.3 | | 2 | Locked | ATDMA | 1 | 5120 | 35.6 | 50.8 | | 3 | Locked | ATDMA | 3 | 5120 | 22.8 | 49.3 | | 4 | Locked | ATDMA | 4 | 5120 | 16.4 | 49.3 | | 5 | Not Locked | Unknown | 0 | 0 | 0 | 0.0 | | 6 | Not Locked | Unknown | 0 | 0 | 0 | 0.0 | | 7 | Not Locked | Unknown | 0 | 0 | 0 | 0.0 | | 8 | Not Locked | Unknown | 0 | 0 | 0 | 0.0 |
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| Wed Jul 29 07:30:01 2020 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:40:36:69:cc:97;CMTS-MAC=b0:90:7e:0e:9b:20;CM-QOS=1.1;CM-VER=3.0; |
| Time Not Established | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 |
| Wed Jul 29 16:18:22 2020 | Warning (5) | MDD message timeout;CM-MAC=00:40:36:69:cc:97;CMTS-MAC=b0:90:7e:0e:9b:20;CM-QOS=1.1;CM-VER=3.0; |
| Wed Jul 29 16:18:23 2020 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:40:36:69:cc:97;CMTS-MAC=b0:90:7e:0e:9b:20;CM-QOS=1.1;CM-VER=3.0; |
| Wed Jul 29 16:22:33 2020 | Warning (5) | MDD message timeout;CM-MAC=00:40:36:69:cc:97;CMTS-MAC=b0:90:7e:0e:9b:20;CM-QOS=1.1;CM-VER=3.0; |
Accepted Solution
nwoghost
Regular Visitor
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4 Messages
5 years ago
For anyone else dealing with this problem.
After trying 2 different hookups in the house and again tighting connections including taking off wall plates to check those, I reached out to Amazon to send a new modem thinking what the heck.....
Here are my values after 24 hours of no drops, and no resets.
tldr: get a new modem sometimes.
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EG
Expert
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111.4K Messages
5 years ago
The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. The downstream power is on the weak side as well. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.
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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nwoghost
Regular Visitor
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4 Messages
5 years ago
"The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. The downstream power is on the weak side as well. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels."
- thank you for replying.
"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"
- As noted in OP, Comcast replaced the 1 splitter I can find, otherwise there are no other ones.
- I cannot access the box on the side of the house so unsure what is there.
"then perhaps it's best to book a tech visit to investigate and correct."
- Yes my likely next course of action
- Do you know how to do this in the most pain-free way?
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EG
Expert
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111.4K Messages
5 years ago
Yeah. 1800comcast. Good luck with it !
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nwoghost
Regular Visitor
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4 Messages
5 years ago
So the painful way. Yes well see on the luck part!
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EG
Expert
•
111.4K Messages
5 years ago
Glad it's better but FWIW, something must have changed with the line / connection. A new / different modem can not correct the power levels like that. A bad connection condition will still be there no matter what modem is used. A new modem is not an automatic blanket answer for everyone. YMMV.
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