Cable Modem LEDs

Bestdata CMX110
When the AC adapter is first connected, the cable modem will initialize itself, while displaying a series of
flashing patterns on the front panel LED incdicators.
When the cable modem is operating properly the POWER light should be lit; the CABLE light should be
lit; the PC light should be lit; the DATA light may flash; and the TEST light should be off.
Toshiba PCX1000 Series (PCX1000, PCX1100 and PCX1100U)
Toshiba PCX2000 Series (PCX2000, PCX2200 and PCX2500)
Power – Off – No power – Verify power supply connections and electrical outlet, also make sure the outlet
is not connected to a switch.
Cable – Off/Blinking – No downstream RF carrier present/downstream RF – Verify cable connections and
try resetting the modem. If cable is ok & modem reset doesn’t work, call technical support.
Cable – Solid – None – Sold for the Cable Modem registered and ready to transfer data.
PC – Off – Modem does not ‘see’ the PC – Verify Ethernet cable connections, the TCP/IP settings and the
NIC. You might need to reinstall the NIC drivers. If any of this does not work, call technical support.
PC – Solid – None – PC has Ethernet connection.
Data – On/Blinking – None – Data is being passed through the modem.
Data – Off – None – No data is being passed through the modem.
Test – On – Bad Modem – Try resetting the modem. If this does not work, call technical support.
RCA DCM-105
RCA DCM205, DCM235, DCM245, DCM305
Power – Indicates whether the cable modem is in stand-by or active mode. The light is off when the
modem is in stand-by mode and on when the power is activated.
PC Link – Indicates whether the connection is active (ready to transmit or receive) or is actually in the
process of transmitting or receiving. The light is off when no carrier is present and there is no transmit or
receive activity, and it flashes when there is transmit or receive activity.
Cable – Indicates the status of the cable connection. The light is off when no cable connection is detected
or the modem is in stand-by mode. The light flashes when the cable connection is detected but not yet
ready to send or receive data. It is fully lit when the modem is registered with the network and data can be
sent or received.
Activity – Indicates the existence of data traffic in the cable line. The light is off when no data traffic is
present. It flashes when data activity exists.
Email – The light is off when no email exists. It flashes when you have email. This is dependent upon the
ISP.
Power – Off – Not receiving power
Power – Solid Green – Receiving power
Cable – Off – Not detecting signal from the cable network
Cable – Solid Green – Modem is online and ready to transmit data
Cable – Slow, Blinking Green – Detecting signal and trying to connect to cable network
Cable – Fast, Blinking Green – Rebooting is in progress
PC – Off – Not establishing ethernet connection
PC – Solid Green – Ethernet connection is established
Data – Off – Not transmitting data
Data – Blinking Green – Modem is transmitting data
Test – Off – Ready to use after initial self-test, or not receiving power
Test – Blinking Amber – Initial self-test in progress or software downloading is in progress
Test – Solid Amber – Self-test failed
PWR – Indicates whether power is being supplied to the modem. This LED is steady green when the
odem is powered.
LAN – Indicates the status of the modem’s connection to your computer. This LED is steady green when a
functional LAN connection (ethernet or USB) is detected.
CBL – Indicates the modem’s acquisition state. This LED is steady green when the modem is fully
acquired.
SND – Indicates that the modem is sending data. This LED flashes green when the modem is sending data
upstream.
RCV – Indicates that the modem is receiving data. This LED flashes green when the modem is receiving
downstream data.
OPT – This LED’s function is defined by your service provider.
Motorola Surfboard 3100, 4100 and 4200 (GI3100, GI4100, and GI4200)
Motorola Surfboard 5100 (GI5100)
Power – On – The cable modem is powered on
Power – Flashing – Startup diagnostics in progress
Receive – On – The downstream channel is connected
Receive – Flashing – Scanning for a receive (downstream) channel connection
Send – On – The upstream channel is connected
Send – Flashing – Scanning for a send (upstream) channel connection
Online – On – The startup process is complete
Online – Flashing – Scanning for a network connection
PC/Activity – On – A device, such as a computer or hub, is connected to the USB or Ethernet connectors
on the back panel.
PC/Activity – Flashing – Transmitting or receiving data
Standby – On – Internet service is blocked because the Standby button was pressed. If this light is on, all
other lights are off
Standby – Flashing – This light does not flash
Linksys BEFCMU10
Power – (Green) When this LED is on, it indicates that the Cable Modem is correctly supplied with power.
The LED should remain lighted constantly.
Activity – (Green) When this LED is on, it indicates that the Cable Modem is properly connected to your
PC or other Ethernet device, either through the USB or Ethernet Port on the back of the Cable Modem.
The LED flashes when data is being transmitted to or from your PC (or other Ethernet device) through the
Cable Modem.
Cable – (Green) This LED will blink to indicate that data is being transmitted to or from your Cable
Modem to the Internet connection.
Status – (Green) This LED will go through a series of flashes as the Cable Modem goes through its startup
process. Once the process is complete, the LED will remain lighted to show a successful connection to
your Internet Service Provider. The Cable Modem will go through this process every time power is taken
away from and restored to it, or when the Reset button is pressed. This process can be fairly quick or
prolonged, depending on your Provider, Internet traffic in your area, etc. If this LED is still blinking 10
minutes after the Cable Modem has been powered up or reset, it is an indication of a connection problem.
3CM2940
Cable Modem Power – Indicates power is applied to the cable modem. This light is solid green when the
modem is on.
Cable Modem Status – This LED varies in color (orange and green) and indicates the modem’s status as
described in the following chart:
LED STATE
Short Off, Long Orange
Orange
Short Off, Short Orange
Long Orange, Short Green
Short Off/Short Green
Green
REPEATING
YES
NO
YES
YES
YES
NO
DESCRIPTION
Startup, power on self test
Failed power on self test
Downstream hunt
Acquisition in process
Offline/not authorized for service
Fully operational state
PC Link Status – Indicates that the cable modem is connected to the Ethernet card in your computer. This
light is solid green when this link is established and your computer is turned on.
PC Link Activity – Indicates that data is being transmitted to or from your PC over the Ethernet port.
Flashing orange indicates traffic. This LED should blink when data is being transmitted or received over
the Ethernet port.
Cable Activity – Indicates that data is being transmitted to or from your cable company over the RF
(cable) port. Flashing orange indicates traffic.
FCN – Individual cable opeators determine the function of this LED.
3CR29210
Cable Modem Power – Indicates power is applied to the cable modem. This LED is solid green when the
cable modem is on.
Cable Modem Status – The color of this LED indicates the cable modems operations status as:
LED STATE
Blinking Red
Solid Red
Solid Green
DESCRIPTION
Cable modem is searching for a downstream channel
Downstream channel is locked
Registration is complete and cable modem is operational
Cable Activity – This LED flashes red when data is transmitted to or from your cable company via the RF
(cable) port. Flashing red indicates traffic.
PC Link Ethernet – This LED indicates that data is transmitted to or from your PC via the Ethernet port.
The LED is solid green when there is connection between the cable modem and an Ethernet port. If the
LED is flashing green, there is traffic over the Ethernet port. If this LED is not lighted, then there is no
connection between the cable modem and an Ethernet port.
PC Link USB – Indicates that data is being transmitted to or from your PC over the USB port. This LED
is solid green when there is a connection between the cable modem and a USB port. If the LED is flashing
green, there is traffic over the USB port. If this LED is not lighted, then there is no connection between the
cable modem and a USB port.
3COM2910, 3COM2920, 3COM2923