Netgear Orbi CBR750 Wi-Fi 6 DOCSIS 3.1 Mesh Wi-Fi Cable Modem Router - won't bond to more than 4-upstream bonded channels

I spoke to Cox sales & tech support prior to purchase of the CBR750 to verify this device is certified to work on the Cox network. - The Cox website actually features the modem- COX CBR750 page

I have reached out though Facebook messenger, and

The issue is that we had a scheduled ‘upgrade’ to our service area in Apri 22, 2021

Our service area had an additional 4-upstream channels added to allow for the full ‘8’ — the Cox tech verified today that his field modem was getting the full 8 — the above The CBR750 is only locking Channel ID 1-4

The Cox webpage (link above) clearly states for the CBR750: “32x8 channel bonding” 

I need someone in Cox engineering to determine that the current modem firmware (V1.01.08.) does not allow for all 8 - upstream bonded channels with Cox cable. And or that my modem is correctly provisioned with the appropriate coding to allow for the full 32x8 channel bonding. 

I cannot personally provision these settings—or modify firmware. 

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 4 5120 Ksym/sec 16900000 Hz 40.0 dBmV
2 Locked ATDMA 3 5120 Ksym/sec 23500000 Hz 42.0 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 29900000 Hz 43.8 dBmV
4 Locked ATDMA 1 5120 Ksym/sec 36300000 Hz 43.3 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
Hardware Version CBR750
Orbi Firmware Version V3.2.18.2_1.4.14
CM Firmware Version V1.01.08
CM Serial Number 67A109XXXXXXX
CM Certificate Installed

Facebook Messenger replies from Cox: 

"Hello XXXX. My name is Allison and I will be assisting you while Maria is away. We value you as a customer and apologize that you are experiencing issues with your modem upload bond channels. After reviewing your account, your account shows that your modem's current firmware version is V1.01.08. We are unable to send anything to you confirming this, but I will provide additional information on getting to this information on your own shortly. Currently, your modem is bonding to 4 upstream channels. We would have to refer you to the manufacturer of the modem to see why all 8 channels on your modem is not working. You can also attempt to log into your modem on your own by going to and use the default username "admin" and password of "password" to login to your router directly to troubleshoot this. Here, you will also be able to find the latest firmware that is on your modem. We are unable to troubleshoot 3rd party equipment through this channel. However, for additional support on this you would have to reach out to NETGEAR or you can add our Advance support Cox Complete Care which $9.99 a month, they can remotely access your computer and assist you with diagnosing your equipment. -Allison"


I apologize XXXX, there is no other team I can get you over to, besides the options I've already provided. I understand this is not the answers you are seeking, however those are the only two options I can provide to you. You can also reach out to our Technical Support department at 800-234-3993, if you wanted to speak to someone directly about this. -Allison


I definitely understand your frustrations XXXX. I'm sorry we could not be of more help. Please feel free to download our free Cox App to manage your account. If we can ever be of additional support, please reach out. We are online 24 hours a day, 7 days a week. -Allison

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