The NETGEAR CM400 cable modem specifications follow below. Note: ApprovedModemList.com may receive a small commission from affiliate links, which helps to keep this website online.
Highlights
- Download speed up to 340 Mbps
- Upload speed up to 122 Mbps
- 8 download and 4 upload channels
- DOCSIS 3.0 cable modem
- Supports IPv4 and IPv6
- WiFi router: No
- VoIP telephone adapter: No
NETGEAR CM400 Cable Modem Images
Notable NETGEAR CM400 Cable Modem Specs
Modem
Type: Cable
DOCSIS: 3.0
Color: Black
IPv4 Support: Yes
IPv6 Support: Yes
WiFi Router: No
VoIP Telephone Adapter: No
Network Interface
Interface: 10/100/1000 RJ-45 Gigabit Ethernet Port
Quantity: 1 Gigabit Ethernet Port
Device Power
Power Consumption: 12 Watts
Environmental
Min Operating Temperature: 32 °F (0 °C)
Max Operating Temperature: 104 °F (40 °C)
Operating Humidity: 90% (maximum relative humidity, non-condensing)
Physical Specifications
Height: 5.8 in (147 mm)
Width: 1.8 in (30 mm)
Depth: 3.8 in (96 mm)
Weight: 0.44 lb (0.19 kg)
Downstream
Maximum Theoretical Data Rate: 340 Mbps*
8 Bonded Channels
Upstream
Maximum Theoretical Data Rate: 122 Mbps*
4 Bonded Channels
*Various factors affect actual data throughput, such as the total number of users on the network, services offered by the internet provider, type of server, computer equipment, and other factors.
NETGEAR Resources
NETGEAR Phone Support: 1-888-638-4327
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NOTE: Xfinity no longer supports this modem and are advising customers that it is EOL.
Correct, which is why it does not appear on the Xfinity approved modem list. The NETGEAR CM400 was removed in April 2021.