Page 3 - Contents
3 Contents Chapter 1 Hardware and Internet Setup Unpack Your Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Back Pane...
Page 4 - Hardware and Internet Setup
4 1 1. Hardware and Internet Setup The NETGEAR CM400 High Speed Cable Modem provides a connection to high-speed cable Internet with speeds up to 340 Mbps. 1 The cable modem is certified by all major cable Internet providers. A Gigabit Ethernet port provides fast access and downloads. The cable modem...
Page 5 - Unpack Your Cable Modem; Front Panel
Hardware and Internet Setup 5 CM400 High Speed Cable Modem Unpack Your Cable Modem Your package contains the following items. Ethernet cable Power adapter Cable modem Attachable feet Figure 1. Package contents Front Panel The cable modem provides status LEDs on the front. Power LED Downstream LED Up...
Page 6 - Back Panel
Hardware and Internet Setup 6 CM400 High Speed Cable Modem You can use the LEDs to verify status and connections. The following table lists and describes each LED on the front panel of the cable modem. Table 1. LED descriptions LED Description Power • Green . Power is supplied to the cable modem. • ...
Page 7 - Product Label; Attach the Feet
Hardware and Internet Setup 7 CM400 High Speed Cable Modem Product Label The product label on the bottom of the cable modem displays the serial number and MAC address of the cable modem and login information, including the default IP address, default user name, and default password. Figure 4. Produc...
Page 8 - Cable Your Cable Modem
Hardware and Internet Setup 8 CM400 High Speed Cable Modem Cable Your Cable Modem The cable modem provides a connection between your cable Internet provider’s network and your computer, router, or WiFi router. Computer, router, or WiFi router Cable modem Coaxial cable to cable outlet Ethernetcable F...
Page 11 - Manage and Monitor
11 2 2. Manage and Monitor After you set up the cable modem, you do not need to log in to the cable modem for normal operation. However, you can log in to the cable modem to change some very limited settings and monitor the cable modem. In the unlikely situation that you experience problems with the...
Page 12 - Log In to the Cable Modem
Manage and Monitor 12 CM400 High Speed Cable Modem Log In to the Cable Modem After you set up the cable modem, you do not need to log in to the cable modem for normal operation. To log in to the cable modem, you must use a web browser such as Microsoft Internet Explorer 5.0 or later, Firefox Mozilla...
Page 13 - View Cable Modem Initialization
Manage and Monitor 13 CM400 High Speed Cable Modem 5. In the Starting Frequency field, type a number. 6. Click the Apply button. Your change takes effect. View Cable Modem Initialization You can track the initialization procedure of the cable modem and get details about the downstream and upstream c...
Page 14 - View Cable Modem Status
Manage and Monitor 14 CM400 High Speed Cable Modem The user name is admin . The default password is password . The user name and password are case-sensitive. The BASIC Home screen displays. 4. Select Cable Connection . The Cable Connection screen displays. The Startup Procedure section displays the ...
Page 15 - View and CLear Event Logs
Manage and Monitor 15 CM400 High Speed Cable Modem The user name is admin . The default password is password . The user name and password are case-sensitive. The BASIC Home screen displays. 4. Select ADVANCED . The Cable Information pane displays. The Cable Information pane displays the following: •...
Page 16 - Change the admin Password
Manage and Monitor 16 CM400 High Speed Cable Modem 4. Select ADVANCED > Administration > Event Log . The Event Log screen displays. The Event Log screen shows the following information: • Time . The time the event log entry was recorded. • Priority . The severity for the event log entry. • Des...
Page 18 - Reset the Cable Modem to Factory Default Settings; Use the Reset Button on the Back Panel
Manage and Monitor 18 CM400 High Speed Cable Modem 5. In the Cable Information pane, click the Reboot button. A confirmation message displays. 6. Click the OK button. The cable modem reboots. Reset the Cable Modem to Factory Default Settings To reset the cable modem to factory default settings, you ...
Page 19 - Use the Factory Reset Software Button
Manage and Monitor 19 CM400 High Speed Cable Modem 3. Release the Reset button. The configuration is reset to factory default settings. When the reset is complete, the cable modem reboots. This process takes about one minute. WARNING: To avoid the risk of corrupting the firmware, do not interrupt th...
Page 21 - Troubleshooting
21 3 3. Troubleshooting This chapter provides information about troubleshooting your cable modem. The chapter includes the following sections: • Use LEDs to Troubleshoot • Cannot Log In to the Cable Modem • Troubleshoot the Cable Internet Connection Note: NETGEAR provides helpful articles and docume...
Page 22 - Use LEDs to Troubleshoot; Cannot Log In to the Cable Modem
Troubleshooting 22 CM400 High Speed Cable Modem Use LEDs to Troubleshoot The following table provides help when you are using the LEDs for troubleshooting. Table 2. Troubleshooting with LEDs LED Behavior Action All LEDs are off when the cable modem is plugged in. Make sure that the power cord is pro...
Page 23 - Troubleshoot the Cable Internet Connection
Troubleshooting 23 CM400 High Speed Cable Modem If the cable modem does not save changes you made, do the following: • When entering configuration settings, be sure to click the Apply button before moving to another screen, or your changes are lost. • Click the Refresh or Reload button in the web br...
Page 24 - Technical Specifications
24 A A. Technical Specifications The following table lists the technical specifications for the cable modem. Table 3. Technical specifications Feature Specification Power adapter • Input: 110–120V, 47–60 Hz • Output: 12 VDC, 1A Physical specifications • Dimensions: 5.8 x 3.8 x 1.8 in. (147 x 96 x 30...
