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Cable connection issues on Comcast/Xfinity with CBR750
Hello. I am using the Orbi CBR750 modem/router mesh combo with one RBS750 satellite, and Comcast/Xfinity as my ISP. Starting this morning, I have been experiencing strange issues with my connection. ...
Other than the power being too high, should be ok other wise.
Have the tech review any Errors, Criticals or Warnings seen in the events log page as well.
As about a in-line attenuator to help with power levels.
Show him this:https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
For any Errors, Criticals or Warnings on the Events log page, the ISP will need to review them and help resolve them.
You might try a full on Factory reset and setup from scratch on the CBR at some point as well.
As mentioned by plemans the power is too high. Ask them to lower it or install a attenuator if they have one.
Thank you both for responding. Forgive my ignorance on the subject, but is it the upstream, downstream, or both on which the power is too high?
Also, I did do a FULL factory reset this morning, and other than the login, SSID, and password, I left all other settings at default just to rule things out. This is what the logs show now:Cable Connection:
Cable Diagnostic Status: Poor Action:
[Downstream Power Level]
Try these actions (Click the Refresh button after each step):
1) Make sure the coaxial cable is tightly connected.
2) Remove any unnecessary splitters.
3) Replace any required splitters.
4) Contact your service provider for troubleshooting help.Internet Access: Downstream Status: Upstream Status: Refresh Save Cable Diagnostic Info Advanced Information 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. Starting Frequency Startup Procedure Procedure Status Comment Acquire Downstream Channel 405000000 Hz Locked Connectivity State Ok Operational Boot State Ok Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4) Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectable 1 Locked QAM 256 1 405000000 Hz 8.9 dBmV 40.9 dB 0 0 2 Locked QAM 256 2 411000000 Hz 9.0 dBmV 40.9 dB 0 0 3 Locked QAM 256 3 417000000 Hz 9.1 dBmV 40.3 dB 3 0 4 Locked QAM 256 4 423000000 Hz 9.1 dBmV 40.3 dB 0 0 5 Locked QAM 256 5 429000000 Hz 9.4 dBmV 40.3 dB 0 0 6 Locked QAM 256 6 435000000 Hz 9.4 dBmV 40.3 dB 10 0 7 Locked QAM 256 7 441000000 Hz 9.6 dBmV 40.9 dB 0 0 8 Locked QAM 256 8 453000000 Hz 9.6 dBmV 40.3 dB 0 0 9 Locked QAM 256 9 459000000 Hz 9.5 dBmV 40.9 dB 0 0 10 Locked QAM 256 10 465000000 Hz 9.5 dBmV 40.3 dB 3 0 11 Locked QAM 256 11 471000000 Hz 9.6 dBmV 40.9 dB 0 0 12 Locked QAM 256 12 477000000 Hz 9.6 dBmV 40.9 dB 0 0 13 Locked QAM 256 13 483000000 Hz 9.6 dBmV 40.9 dB 0 0 14 Locked QAM 256 14 489000000 Hz 9.5 dBmV 40.3 dB 0 0 15 Locked QAM 256 15 495000000 Hz 9.6 dBmV 40.9 dB 0 0 16 Locked QAM 256 16 501000000 Hz 9.8 dBmV 40.3 dB 0 0 17 Locked QAM 256 17 507000000 Hz 9.8 dBmV 40.3 dB 0 0 18 Locked QAM 256 18 513000000 Hz 9.9 dBmV 40.9 dB 0 0 19 Locked QAM 256 19 519000000 Hz 9.9 dBmV 40.3 dB 0 0 20 Locked QAM 256 20 525000000 Hz 10.0 dBmV 40.3 dB 0 0 21 Locked QAM 256 21 531000000 Hz 9.9 dBmV 40.3 dB 0 0 22 Locked QAM 256 22 537000000 Hz 9.9 dBmV 40.3 dB 0 0 23 Locked QAM 256 23 543000000 Hz 9.9 dBmV 40.3 dB 0 0 24 Locked QAM 256 24 549000000 Hz 9.9 dBmV 40.3 dB 0 0 25 Locked QAM 256 25 555000000 Hz 9.8 dBmV 40.3 dB 0 0 26 Locked QAM 256 26 561000000 Hz 10.0 dBmV 40.3 dB 0 0 27 Locked QAM 256 27 567000000 Hz 10.0 dBmV 40.9 dB 0 0 28 Locked QAM 256 28 573000000 Hz 10.0 dBmV 40.3 dB 0 0 29 Locked QAM 256 29 579000000 Hz 10.0 dBmV 40.3 dB 0 0 30 Locked QAM 256 30 585000000 Hz 10.3 dBmV 38.9 dB 0 0 31 Locked QAM 256 31 591000000 Hz 10.4 dBmV 40.3 dB 0 0 32 Not Locked N/A N/A 0 Hz 0.0 dBmV 0.0 dB 0 0 Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 4 5120 Ksym/sec 16400000 Hz 43.5 dBmV 2 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 43.8 dBmV 3 Locked ATDMA 2 5120 Ksym/sec 29200000 Hz 44.3 dBmV 4 Locked ATDMA 1 5120 Ksym/sec 35600000 Hz 44.8 dBmV 5 Locked ATDMA 5 1280 Ksym/sec 39600000 Hz 45.3 dBmV 6 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 dBmV Downstream OFDM Channels Channel Lock Status Modulation/Profile ID Channel ID Frequency Power SNR/MER Active Subcarrier
Number RangeUnerrored
CodewordsCorrectable
CodewordsUncorrectable
Codewords1 Locked 3 45 690000000 Hz 11.0 dBmV 41.7 dB 1108~2987 0 0 0 2 Not Locked 0 0 0 Hz 0.0 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 0 0 0 Hz 0.0 dBmV 2 Not Locked 0 0 0 Hz 0.0 dBmV Current System Time: Tue Jan 24 09:10:51 2023 System Up Time 00:19:31 Event Logs:Clear Log Refresh Time Priority Description Time Not Established Critical (3) No Ranging Response received - T3 time-out Jan 24 2023 08:52:55 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 Jan 24 2023 08:52:55 Notice (6) TLV-11 - unrecognized OID Jan 24 2023 08:52:55 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11 Jan 24 2023 08:53:03 Warning (5) RCS Partial Service Jan 24 2023 08:53:04 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW Jan 24 2023 08:53:12 Alert (2) CM Certificate Error Jan 24 2023 08:53:16 Notice (6) CM-STATUS message sent. Event Type Code: 4 Things seem more stable, but it's only been 15-20 minutes or so. Cable connection still says "Poor" which I guess is due to the power from the line being too high. So I guess I will wait until the Comcast/Xfinity technician comes and ask them how they can address that. Is there anything else I should communicate to them at that time? Any advice would be much appreciated. I'd really hope to have this resolved in one trip, if possible. Thank you for your knowledge on this.If you have a double/triple splitter (cap the unused ports) you can put that in line. It drops the power a bit. Might get it down to a reasonable level to see if it'd stay stable.Thats what I did with mine as it was coming in around 11-12 dbmv and had a bunch of errors/ issues. Worked well after that.
Other than the power being too high, should be ok other wise.
Have the tech review any Errors, Criticals or Warnings seen in the events log page as well.
As about a in-line attenuator to help with power levels.
Show him this:https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
