NETGEAR Modem CM400 User Manual

CM400 High Speed Cable Modem  
User Manual  
August 2014  
202-11412-01  
350 East Plumeria Drive  
San Jose, CA 95134  
USA  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Contents  
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
1.  
Hardware and Internet Setup  
1
The NETGEAR CM400 High Speed Cable Modem provides a connection to high-speed cable  
Internet with speeds up to 340 Mbps. The cable modem is certified by all major cable Internet  
providers. A Gigabit Ethernet port provides fast access and downloads. The cable modem  
supports IPv4 and IPv6 address assignment by cable Internet providers.  
1
This chapter covers the following topics:  
Note: For more information about the topics covered in this manual, visit the  
support website at http://support.netgear.com.  
1. Maximum rate is derived from DOCSIS 3.0 specifications and actual throughput varies depending on your Internet subscription with your provider.  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
CM400 High Speed Cable Modem  
Unpack Your Cable Modem  
Your package contains the following items.  
Attachable feet  
Cable modem  
Power adapter  
Ethernet cable  
Figure 1. Package contents  
Front Panel  
The cable modem provides status LEDs on the front.  
Ethernet LED  
Upstream LED  
Downstream LED  
Power LED  
Internet LED  
Figure 2. Cable modem front view  
Hardware and Internet Setup  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
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.  
Off. No power is supplied to the cable modem.  
Downstream  
Upstream  
Internet  
Solid green. One or more downstream channels are locked.  
Blinking green. The cable modem is scanning for a downstream channel.  
Off. No downstream channel is locked.  
Solid green. One or more upstream channels are locked.  
Blinking green. The cable modem is scanning for an upstream channel.  
Off. No upstream channel is locked.  
Solid green. The cable modem is online.  
Blinking green. The cable modem is synchronizing with the cable provider’s cable  
modem termination system (CMTS).  
Off. The cable modem is offline.  
Note: The Internet LED is also referred to as the Online LED.  
Ethernet  
Green. A device is connected to the Ethernet port and powered on.  
Off. No device is connected to the Ethernet port.  
Back Panel  
The back panel provides the connections and button shown the following figure.  
LAN Gigabit Ethernet port  
Reset button  
Figure 3. Cable modem back panel  
Power adapter input  
Coaxial cable connector  
Hardware and Internet Setup  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
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. Product label  
Attach the Feet  
The cable modem functions well in either a horizontal or vertical position.  
If you prefer to place the cable modem in the upright (vertical) position, attach the feet that  
come with the cable modem.  
To attach the feet:  
1. Hold the cable modem in the upright position with the left side of the cable modem pointing  
down.  
2. Snap the feet onto the cable modem.  
Figure 5. Attaching the feet  
Hardware and Internet Setup  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
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.  
Ethernet  
cable  
Coaxial cable to cable outlet  
Computer,  
router, or  
WiFi router  
Cable modem  
Figure 6. Cabling the cable modem  
To cable your cable modem:  
1. Connect a coaxial cable.  
Use the coaxial cable that your cable company provides to connect the cable port on the  
cable modem to a cable wall outlet or a line splitter.  
Note: If Charter is your cable Internet provider, Charter recommends  
connecting your cable modem directly to a cable wall outlet. If you must  
use a splitter, use a splitter that is rated at 3.5 dBmv.  
Note: If Comcast Xfinity is your cable Internet provider, Comcast Xfinity  
recommends connecting your cable modem directly to a cable wall  
outlet.  
2. Connect the power adapter provided in the package to the cable modem and plug the power  
adapter into an electrical outlet.  
The Power LED  
lights green.  
3. Turn off the computer, router, or WiFi router to which you intend to connect the cable  
modem.  
4. Use the Ethernet cable provided in the package to connect the Gigabit Ethernet port on the  
cable modem to an Ethernet port on a computer, router, or WiFi router.  
Hardware and Internet Setup  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
CM400 High Speed Cable Modem  
5. Turn on the computer, router, or WiFi router.  
6. Wait for the cable modem to come online.  
It takes at least 15 minutes for the cable modem to come online on the network. During  
this time, the Downstream LED  
After the cable modem registers with your cable Internet service provider, the  
Internet LED lights green. Even though an Internet connection is established,  
and Upstream LED  
might blink.  
Internet service is available only after you set it up with your cable Internet provider.  
For information about how to set up your Internet service, see Contact Your Cable  
Contact Your Cable Internet Provider and Set Up Internet  
Service  
You must contact your Internet provider and tell them that you are using a new cable modem.  
Note: If Comcast Xfinity is your cable Internet provider, you do not need to  
call. Just launch a web browser. You are redirected to the Xfinity  
self-activation page on which you can enter your Xfinity credentials.  
To set up your Internet connection:  
1. Contact your cable Internet provider and inform them that you are installing a new cable  
modem that you bought from a retail store.  
Provide your cable Internet provider with the cable modem’s model number, which is  
CM400.  
Note: The cable modem is certified by all major cable Internet providers.  
You can also visit your cable Internet provider’s website and follow the onscreen  
instructions to set up your Internet service.  
Cable Internet Provider Contact Information  
Bright House Networks  
1-866-898-9101  
Cablevision  
Note: When you attempt to contact Cablevision online, you are directed to the  
Optimum web page. Optimum is a brand name of Cablevision.  
Hardware and Internet Setup  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
CM400 High Speed Cable Modem  
Cable Internet Provider Contact Information  
Charter  
Comcast  
Cox  
1-888-438-2427  
1-800-COMCAST (1-800-266-2278)  
1-877-891-2899  
Optimum  
Note: Optimum is a brand name of Cablevision.  
Time Warner Cable  
1-800-892-2253  
Note: The contact information listed might change. You can also find the  
contact number in your monthly Internet service billing statement.  
2. When asked, provide the cable modem’s serial number and MAC address, which are on the  
3. Wait for your cable Internet provider to confirm that your cable modem is active.  
4. If you do not get an Internet connection with the cable modem, ask your cable Internet  
provider to look for your cable modem online, and do one of the following depending on  
what your cable Internet provider tells you about your cable modem:  
If the cable modem is not visible, your cable Internet provider can give you instructions  
to verify why the cable modem does not connect with your high-speed Internet  
service.  
If the cable modem is visible to your cable Internet provider, reboot the computer,  
laptop, router, or WiFi router that is connected to the cable modem. Try checking your  
online status again.  
Hardware and Internet Setup  
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
2.  
Manage and Monitor  
2
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 cable  
connection and cannot get an Internet connection, technical support might ask you to log in to  
the router.  
This chapter contains the following sections:  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
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 2.0 or later, Safari 1.4 or later, or Google Chrome 11.0 or  
later.  
To log in to the cable modem:  
1. Launch a web browser from a computer that is attached over an Ethernet cable to the  
cable modem or from a computer that is connected to a WiFi router that is attached over an  
Ethernet cable to the cable modem.  
A login screen displays.  
3. Enter the cable modem user name and password.  
The user name is admin. The default password is password. The user name and  
password are case-sensitive.  
The BASIC Home screen displays.  
Specify the Cable Connection Starting Frequency  
The starting frequency for the cable connection is automatically generated. For most Internet  
connections, you do not need to specify this information. If you need to enter a starting  
frequency, contact your Internet provider.  
To change the starting frequency:  
1. Launch a web browser from a computer that is attached over an Ethernet cable to the  
cable modem or from a computer that is connected to a WiFi router that is attached over an  
Ethernet cable to the cable modem.  
A login screen displays.  
3. Enter the cable modem user name and password.  
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.  
Manage and Monitor  
12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
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 cable channel. The time is displayed after the cable modem is  
initialized.  
The cable modem automatically goes through the following steps in the provisioning process:  
1. Scans and locks the downstream frequency and then ranges the upstream channels.  
2. Obtains a WAN IP address for the cable modem.  
3. Connects to the Internet.  
To view the status of the cable modem initialization:  
1. Launch a web browser from a computer that is attached over an Ethernet cable to the  
cable modem or from a computer that is connected to a WiFi router that is attached over an  
Ethernet cable to the cable modem.  
A login screen displays.  
3. Enter the cable modem user name and password.  
Manage and Monitor  
13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
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 initialization progress.  
The Downstream Bonded Channels section displays the status of each channel.  
5. To see the Upstream Bonded Channels section and system time, scroll down.  
View Cable Modem Status  
You can view some basic information about the cable modem.  
To view cable modem status:  
1. Launch a web browser from a computer that is attached over an Ethernet cable to the  
cable modem or from a computer that is connected to a WiFi router that is attached over an  
Ethernet cable to the cable modem.  
A login screen displays.  
3. Enter the cable modem user name and password.  
Manage and Monitor  
14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
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:  
Hardware Version. The version of the cable modem model.  
Firmware Version. The version of the cable modem firmware.  
Cable Modem Serial Number. The serial number of the cable modem.  
CM Certificate. The status of the cable modem certificate. If Not installed displays as  
the status, contact your cable Internet provider.  
For information about using the Reboot button, see Reboot the Cable Modem on page 17.  
For information about using the Factory Reset button, see Reset the Cable Modem to  
View and CLear Event Logs  
Event logs capture important cable modem events.  
To view and clear the event logs:  
1. Launch a web browser from a computer that is attached over an Ethernet cable to the  
cable modem or from a computer that is connected to a WiFi router that is attached over an  
Ethernet cable to the cable modem.  
A login screen displays.  
3. Enter the cable modem user name and password.  
The user name is admin. The default password is password. The user name and  
password are case-sensitive.  
The BASIC Home screen displays.  
Manage and Monitor  
15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
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.  
Description. A description of the event log entry.  
5. To refresh the log screen, click the Refresh button.  
6. To clear the log entries, click the Clear Log button.  
Change the admin Password  
You can change the default password that is used to log in to the cable modem with the user  
name admin.  
To change the password for the user name admin:  
1. Launch a web browser from a computer that is attached over an Ethernet cable to the  
cable modem or from a computer that is connected to a WiFi router that is attached over an  
Ethernet cable to the cable modem.  
A login screen displays.  
3. Enter the cable modem user name and password.  
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 > Administration > Set Password.  
The Set Password screen displays.  
Manage and Monitor  
16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
CM400 High Speed Cable Modem  
5. Type the old password.  
6. Type the new password in the Set Password field.  
7. Type the new password in the Repeat New Password field.  
8. Click the Apply button.  
Your change takes effect.  
Reboot the Cable Modem  
Rebooting the cable modem disconnects all computers from the cable modem’s local area  
network (LAN). After the cable modem is finished booting and reestablishes a connection  
with the cable provider’s network, the devices reconnect to the cable modem’s LAN.  
To reboot the cable modem:  
1. Launch a web browser from a computer that is attached over an Ethernet cable to the  
cable modem or from a computer that is connected to a WiFi router that is attached over an  
Ethernet cable to the cable modem.  
A login screen displays.  
3. Enter the cable modem user name and password.  
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.  
Manage and Monitor  
17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
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 can use either the Reset button on  
the back panel of the cable modem or the Factory Reset software button. However, if you  
changed the default password to access the cable modem and lost the password, you must  
use the Reset button on the back panel.  
After you reset the cable modem to factory default settings, the user name is admin, the  
password is password. The LAN IP address is always 192.168.100.1. You cannot change  
this LAN IP address.  
Use the Reset Button on the Back Panel  
CAUTION:  
This process erases all settings that you configured in the cable modem.  
To reset the cable modem to factory default settings:  
1. On the back of the cable modem, locate the Reset button.  
Reset button  
2. Using a straightened paper clip, press and hold the Reset button until the Upstream and  
Downstream LEDs light amber.  
Manage and Monitor  
18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
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 the  
reset. For example, if you are connected to the web management  
interface, do not close the browser, click a link, or load a new page.  
Do not turn off the cable modem.  
Use the Factory Reset Software Button  
CAUTION:  
This process erases all settings that you configured in the cable modem.  
To erase the settings:  
1. Launch a web browser from a computer that is attached over an Ethernet cable to the  
cable modem or from a computer that is connected to a WiFi router that is attached over an  
Ethernet cable to the cable modem.  
A login screen displays.  
3. Enter the cable modem user name and password.  
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.  
5. In the Cable Information pane, click the Factory Reset button.  
A confirmation message displays.  
Manage and Monitor  
19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
CM400 High Speed Cable Modem  
6. Click the OK 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 the  
reset. For example, do not close the browser, click a link, or load a  
new page. Do not turn off the cable modem.  
Manage and Monitor  
20  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3.  
Troubleshooting  
3
This chapter provides information about troubleshooting your cable modem.  
The chapter includes the following sections:  
Troubleshoot the Cable Internet Connection  
Note: NETGEAR provides helpful articles and documentation at  
21  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
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 properly connected to your cable modem and  
that the power supply adapter is properly connected to a functioning power  
outlet.  
Check that you are using the 12 VDC power adapter from NETGEAR for this  
product.  
If the error persists, a hardware problem occurred. Contact technical support.  
All LEDs stay on.  
Clear the configuration of the cable modem to its factory defaults. This  
operation sets the IP address of the cable modem to 192.168.100.1.  
If the error persists, a hardware problem occurred. Contact technical  
support.  
Ethernet LED  
port with an Ethernet  
connection.  
is off for a  
Make sure that the Ethernet cable connections are secure at the cable  
modem and at the computer, router, or WiFi router.  
Make sure that power is turned on to the connected hub or computer.  
Be sure that you are using the correct cable.  
Internet LED  
cable modem is connected to  
the cable wall jack.  
is off and the  
Make sure that the coaxial cable connections are secure at the cable  
modem and at the wall jack.  
Make sure that your cable Internet provider provisioned your cable Internet  
service. Your provider can verify that the signal quality is good enough for  
cable modem service.  
Remove any excessive splitters that you installed on your cable line. Run a  
“home run” back to the point where the cable enters your home.  
Cannot Log In to the Cable Modem  
If you cannot access the cable modem from computer that is connected to the cable modem  
or to a router that is connected the cable modem, check the following:  
If your computer is connected to the cable modem with an Ethernet cable, check the  
connection.  
Make sure that your computer’s IP address is on the same subnet as the cable  
modem.The IP address of your computer must be in the range of 192.168.100.2 to  
192.168.100.254.  
Make sure Java, JavaScript, or ActiveX is enabled in your browser. If you are using  
Internet Explorer, click the Refresh button to make sure that the Java applet is loaded.  
Try quitting the browser and launching it again.  
Make sure that you are using the correct login information. The cable modem user name  
admin is lowercase (Caps Lock is off). The default password is password.  
Troubleshooting  
22  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
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 browser. The changes occurred, but the  
web browser might be caching the old configuration.  
Troubleshoot the Cable Internet Connection  
If your cable modem cannot access the Internet but the Internet LED  
lights green,  
register the cable MAC address or device MAC address of your cable modem with your cable  
page 9).  
Troubleshooting  
23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
A.  
Technical Specifications  
A
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  
Environmental  
Interface  
Dimensions: 5.8 x 3.8 x 1.8 in. (147 x 96 x 30 mm)  
Weight: 0.44 lb (0.19 kg)  
Operating temperature: 32° to 104°F (0° to 40°C)  
Operating humidity: 90% maximum relative humidity, noncondensing  
Local: 10/100/1000 RJ-45 Gigabit Ethernet port  
Internet: Coaxial cable connector  
DOCSIS 3.0: Backward compatible with DOCSIS 2.0  
Memory  
128 MB Flash  
128 MB RAM  
Certifications  
CableLabs certified for U.S. cable Internet services  
24  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 

NEC Indoor Furnishings NP3150CM User Manual
Nikon Digital Camera 13mm User Manual
Nilfisk ALTO Vacuum Cleaner 19 Gallon Series User Manual
NordicTrack Home Gym NTB39020 User Manual
Olivetti Printer PG L230 User Manual
Omega Scanner DPS3100 User Manual
Omron Healthcare Blood Pressure Monitor HEM 907XL User Manual
Orion Car Audio Car Amplifier Amplifier User Manual
Panasonic CRT Television CT 27G32 User Manual
Panasonic Microwave Oven F00039X90KT User Manual