Orbi CBR750 drop connection wan side

Recently a few weeks now I noticed internet connection drops. I have Spectrum cable to Orbi CBR750 Modem/Router. Not sure if there was a firmware update but it is currently V4.6.14.4_2.3.12 I have t...

ron352

Aspirant

Nov 18, 2024

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	261000000 Hz	Locked
Connectivity State	Ok	Operational
Boot State	Ok	Operational
Security	Enabled	BPI+
IP Provisioning Mode	IPv6 Only	ipv6Only(1)

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectable
1	Locked	QAM 256	1	261000000 Hz	8.0 dBmV	38.6 dB	4	0
2	Locked	QAM 256	2	267000000 Hz	8.0 dBmV	38.9 dB	0	0
3	Locked	QAM 256	3	273000000 Hz	7.6 dBmV	38.9 dB	0	0
4	Locked	QAM 256	4	279000000 Hz	7.3 dBmV	38.9 dB	0	0
5	Locked	QAM 256	5	285000000 Hz	6.9 dBmV	38.9 dB	0	0
6	Locked	QAM 256	6	291000000 Hz	7.0 dBmV	38.6 dB	0	0
7	Locked	QAM 256	7	297000000 Hz	6.9 dBmV	38.9 dB	0	0
8	Locked	QAM 256	8	303000000 Hz	6.8 dBmV	38.6 dB	0	0
9	Locked	QAM 256	9	309000000 Hz	6.6 dBmV	38.9 dB	0	0
10	Locked	QAM 256	10	315000000 Hz	6.5 dBmV	38.6 dB	0	0
11	Locked	QAM 256	11	321000000 Hz	6.4 dBmV	38.6 dB	0	0
12	Locked	QAM 256	12	327000000 Hz	6.3 dBmV	38.9 dB	0	0
13	Locked	QAM 256	13	333000000 Hz	6.1 dBmV	38.9 dB	0	0
14	Locked	QAM 256	14	339000000 Hz	6.0 dBmV	38.9 dB	0	0
15	Locked	QAM 256	15	345000000 Hz	5.6 dBmV	38.9 dB	0	0
16	Locked	QAM 256	16	351000000 Hz	5.5 dBmV	38.9 dB	0	0
17	Locked	QAM 256	17	357000000 Hz	5.5 dBmV	38.9 dB	0	0
18	Locked	QAM 256	18	363000000 Hz	5.4 dBmV	38.6 dB	0	0
19	Locked	QAM 256	19	369000000 Hz	5.1 dBmV	38.9 dB	0	0
20	Locked	QAM 256	20	375000000 Hz	4.9 dBmV	38.6 dB	0	0
21	Locked	QAM 256	21	381000000 Hz	4.8 dBmV	38.6 dB	0	0
22	Locked	QAM 256	22	387000000 Hz	5.0 dBmV	38.6 dB	0	0
23	Locked	QAM 256	23	393000000 Hz	4.9 dBmV	38.6 dB	0	0
24	Locked	QAM 256	24	399000000 Hz	4.8 dBmV	38.9 dB	0	0
25	Locked	QAM 256	26	405000000 Hz	4.6 dBmV	38.6 dB	0	0
26	Locked	QAM 256	27	411000000 Hz	4.8 dBmV	38.6 dB	0	0
27	Locked	QAM 256	28	417000000 Hz	4.8 dBmV	38.6 dB	0	0
28	Locked	QAM 256	29	423000000 Hz	4.6 dBmV	38.6 dB	0	0
29	Locked	QAM 256	30	453000000 Hz	4.1 dBmV	38.6 dB	0	0
30	Locked	QAM 256	31	459000000 Hz	3.9 dBmV	38.6 dB	0	0
31	Locked	QAM 256	32	465000000 Hz	4.0 dBmV	38.6 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	6	5120 Ksym/sec	24200000 Hz	41.5 dBmV
2	Locked	ATDMA	7	5120 Ksym/sec	30600000 Hz	42.0 dBmV
3	Locked	ATDMA	8	5120 Ksym/sec	37000000 Hz	42.0 dBmV
4	Not Locked	N/A	Unknown	0 Ksym/sec	0 Hz	0.0 dBmV
5	Not Locked	N/A	Unknown	0 Ksym/sec	0 Hz	0.0 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 Range	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	2	25	624000000 Hz	4.9 dBmV	39.1 dB	388~3707	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	Locked	0	5	6025000 Hz	39.2 dBmV
2	Not Locked	0	0	0 Hz	0.0 dBmV

Current System Time: Sun Nov 17 14:14:43 2024

System Up Time 09:58:50

FURRYe38

Guru - Experienced User

Nov 18, 2024

Channels 1 thru 4 are too high in power:

https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router

I'd find you a -3dbm cable coax attenuator to put between the CBR and coax cable line.

Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853

https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events

ron352
Aspirant
Nov 18, 2024
I have a 6db Attenuator between the coax and modem/router now.
Line was new from pole to modem maybe 6 years ago by Spectrum.
No kinks nothing else on the line just straight to the modem.
It ran fine all these years but maybe the last 3-4 weeks it seems it will loose internet until I pull the power to the modem and plug it back in
Ron
- FURRYe38
  Guru - Experienced User
  Nov 18, 2024
  Wow, Might ask the ISP to help you turn down the power a bit more then.
  
  Has a factory reset and setup from scratch been performed?
  
  The ISP needs to check the events log and resolve issues seen there. Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.
  - ron352
    Aspirant
    Nov 18, 2024
    Yesterday I hit the factory reset on the Orbi and set it back up.
    This morning it went out at around 7:50 am I had to pull the power and plug it back in.
    I just ordered a -3DB attinuator will try when it comes.
    Maybe the 6DB one was not enough but it worked fine in there till recently

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Orbi CBR750 drop connection wan side