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CM100 Frequently Asked Questions

TABLE OF CONTENTS

HARDWARE INFORMATION

1. What is the CM100?
2. What is the advantage of having a cable modem?
3. What version of DOCSIS does the CM100 support?
4. What is the IP Address, User name, and Password to login to the CM100?
5. Does the CM100 have a DHCP server?
6. Why am I not getting the full speed from my ISP when using the USB port?
7. How fast is the Ethernet port on the CM100?
8. How can I reset the CM100 to factory defaults?
9. What is the warranty period of the CM100?
10. There are two (2) MAC addresses written on the bottom of the CM100, Modem MAC address and USB MAC address.  Which one do I give to the ISP when setting up the device?
11. What power supply does the CM100 use?

LEDs

1. What LEDs does the CM100 have and what do they mean?


HARDWARE INFORMATION

1. What is the CM100?

It is a cable modem that has a USB and Ethernet port.

2. What is the advantage of having a cable modem?

Most Cable Internet Service Providers (ISPs) charge a monthly rental fee for using one of their leased modems.  Owning your own modem waives that fee.

3. What version of DOCSIS does the CM100 support?

  • 1.0
  • 1.1
  • 2.0

4. What is the IP Address, User name, and Password to login to the CM100?

The IP Address is 192.168.100.1.  No password is required to access the web-based setup page.

5. Does the CM100 have a DHCP server?

Yes, but only when the CM100 is unable to obtain an IP address from the ISP.

6. Why am I not getting the full speed from my ISP when using the USB port?

The USB port is only a USB 1.1 port.  USB 1.1 has a maximum throughput of 12 Mbps.  If the downstream coming from the ISP is greater than 12 Mbps, you will need to use the Ethernet port for the full speed.

7. How fast is the Ethernet port on the CM100?

10/100 Mbps.

8. How can I reset the CM100 to factory defaults?

Press and hold the Reset button located at the back panel of the CM100 for about 30 seconds.

9. What is the warranty period of the CM100?

The warranty period is dependent on the country of purchase.  For more information about your device's warranty, click here.

10. There are two (2) MAC addresses written on the bottom of the CM100, Modem MAC address and USB MAC address.  Which one do I give to the ISP when setting up the device?

Modem MAC address.

11. What power supply does the CM100 use?

12V 1A-SW.

LEDs

1. What LEDs does the CM100 have and what do they mean?

  • Power (Green) - The Power LED lights up when the Cable modem is powered ON.  It should be solidly lit after the self-test.
  • DS (Green) - The DS (Downstream) LED lights up and flashes when the Cable modem is trying to lock on a downstream signal.  The LED is solidly lit when it is locked on the signal.
  • US (Green) - The US (Upstream) LED lights up and flashes when the Cable modem is trying to lock on an upstream signal.  The LED is solidly lit when it is locked on the signal.
  • Online (Green) - The Online LED flashes when the Cable modem is establishing a connection to your cable ISP.  It is solidly lit when the Cable modem is synchronized with your cable ISP.
  • Link (Green) -  The Link LED lights up when the Cable modem is connected to your computer or network through the Ethernet or USB port.  It flashes when there is activity on the Ethernet or USB port.

NOTE:  If you have any problems related to the installation and network problems, do contact your Cable ISP.  Update the firmware of your device.  To download the latest firmware of your Linksys device, go to the Linksys Support Site.

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