
ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem
Q: Does the S34 support DOCSIS 3.1?
A: The ARRIS SURFboard S34 is a DOCSIS 3.1 cable modem.
Q: What is the height of the S34?
A: The height of the S34 is 5.14 inches.
Q: What is the manufacturer's warranty for parts?
A: The manufacturer's warranty for parts is 2 years.
Q: What type of modem is the S34?
A: The S34 is a high speed modem.
A: The S34 is listed on Xfinity's "Full List of Compatible Devices" PDF and it works with Next Gen Speed Tier service for download speed up to 2.32 Gbps and upload speed up to 444 Mbps. https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2025.03.25%20Full%20List%20of%20Compatible%20Devices.pdf
Q: Will the Arris modem s34 work with Optimum.net?
A: Optimum allows you to use the S34 modem on their Internet service with no phone service.
Q: Does this S34 run hot? as so many have reported the S33 to get hot enough to shut down,
A: It gets warm, not hot. It has never shut down.
A: Yes - but they won't be very helpful if you need support since it's a BYOD modem. Here's a quick cheat sheet based on my experience: 1. Does the light turn solid blue? If yes, you have a cable connection. 2. When connected directly (no router), check your _gateway_ ip. If it is 192.168.1.100 you do not yet have a DHCP lease from Cox. 3. If your gateway IP is anything else, then you have a DHCP lease and Cox is able to provide service. (even if they claim otherwise) 3a. If you have a Cox IP AND DNS IP's then you _should_ be able to reach the internet. If you cannot, it means you are in the "Cox internet captive portal" and there are issues with provisioning. (again, even if they claim otherwise). I hope these pointers help someone get through the madness that is COX internet support. Sincerely, Someone who was a cable tech at one point.