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About DSL modem lights - TP-Link modems

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The operational status of your DSL modem is usually indicated by lights (LEDs). Different modem models vary in detail, of course, but typically they have lights to indicate power, the status and activity of the DSL line, and the status and activity of connections to your computer, whether by ethernet or by wireless.
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The operational status of your TP-Link DSL modem is indicated by lights (LEDs). TP-Link modems have lights to indicate power, the status and activity of the DSL line, and the status and activity of connections to your computer, whether by ethernet or by wireless.
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For example, Thomson 585 modems have five lights on the front (Power, Ethernet, WLAN, DSL and Internet) and four lights on the back, which show the status of each of the four ethernet ports.
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TP-Link modems have lights on the front (8901G and 8950) or the top (8816, 8951, 8961 and 9970).
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Information is communicated by the colour of the lights and whether they are steady or flashing. Activity on a line is often indicated by flickering lights, when the line is active.
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Information is communicated by whether the lights are on, off or flashing. Activity on a line is often indicated by flickering lights, when the line is active.
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Here's a summary of how to read the lights of a Thomson 585 v7 (other models are similar):
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This article includes a summary of how to read the lights on TP-Link modems.
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[[File:speedtouch585leds.png]]
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==8816 Single Ethernet Port ADSL Modem==
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[[File:8816Lights.jpg|600px]]
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;Power
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:Should be solid green. If it is unlit, there is a power problem or the unit is broken. Check that the modem is plugged in and switched on.
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== Power light ==
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;LAN (Local Area Network)
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The power light should be '''steady green'''. If it is unlit, there is a power problem or the unit is broken. Check that the modem is plugged in and switched on.
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:Should be solid green if a computer is connected to the ethernet port.
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If the power light is '''red''' or '''amber''', the unit has discovered a problem with its hardware or software. Try ''power cycling'' the unit, by unplugging the unit from the power and disconnecting it from all cables, waiting more than 5 seconds (for capacitors to discharge) and then connecting it to power again. If the power light goes green, then connect cables. Otherwise, if the red or amber Power light persists, the unit is most likely broken and will have to be replaced.
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;ADSL (Asymmetric Digital Subscriber Line)
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:Flashes green when the modem is synchronizing, will be solid green once synchronization has occurred.
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== Ethernet light ==
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;Internet
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The ethernet light should be '''green''' (steady or flickering), as long as there is at least one ethernet cable connected to a working computer. A green light indicates that ethernet communication is possible. Ethernet traffic is indicated by flickering of the light.
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: Will illuminate green when authentication has been successful, and will flash to show data traffic.
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To check individual cables, most SpeedTouch modems have green LEDs at the back of the modem where the ethernet cables plug in. The LED there will be green (and flicker with activity) if ethernet is active on that particular cable.  
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==8901G 4-Ports + "G" Wireless ADSL Modem & 8950ND 4-Ports + "N" Wireless ADSL Modem==
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[[File:8901GLights.jpg|600px]]
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;Power
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:Should be solid green. If it is unlit, there is a power problem or the unit is broken. Check that the modem is plugged in and switched on.
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;ADSL (Asymmetric Digital Subscriber Line)
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:Flashes green when the modem is synchronizing, will be solid green once synchronization has occurred.
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;Internet
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:Will illuminate green when authentication has been successful, and will flash to show data traffic.
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;WLAN light (Wireless Local Area Network)
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:Will be solid green or flashing green if a computer is connected to the wireless.
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;Numbers
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:These lights correspond to Ethernet ports connected. These will show a solid green light when a computer is connected to the corresponding port by Ethernet cable and will flash to show data traffic.
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'''Note:''' If you are having problems and find any of those back-side ethernet LEDs flashing at a steady rate (on-off-on-off...), it indicates a hardware problem that requires service, but try power-cycling just in case that resolves it.
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==8951ND 4-Ports + "N" Wireless ADSL Modem==
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[[File:8951Lights.jpg|600px]]
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;Power
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:Should be solid green. If it is unlit, there is a power problem or the unit is broken. Check that the modem is plugged in and switched on.
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;ADSL (Asymmetric Digital Subscriber Line)
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:Flashes green when the modem is synchronizing, will be solid green once synchronization has occurred.
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;Internet
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:Will illuminate green when authentication has been successful, and will flash to show data traffic.
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;WLAN (Wireless Local Area Network)
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:Will be solid green or flashing green if a computer is connected to the wireless.
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;WPS light (lock symbol)
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:Disregard
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;Ethernet
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:These lights correspond to ethernet ports connected. These will show a solid green light when a computer is connected to the corresponding port by Ethernet cable and will flash to show data traffic.
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== WLAN (Wireless) light ==
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==9970 4-Ports + "N" Wireless ADSL/VDSL Modem==
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The WLAN light flashes to indicate wireless activity. The colour of the light indicates the security mode of the wireless service: '''green''' is highest security, using WPA encryption; '''amber''' is medium security, using WEP; and '''red''' indicates no security (anyone can use your wireless without providing a password).  The light is '''unlit''' if wireless is disabled (turned off).
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[[File:TP-Link 9970 LEDs.png|600px]]
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For information about configuring wireless and enabling/disabling it, please consult the [[Modem manuals (DSL)|modem manual]] for your unit.
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# If the DSL LED is off, check your internet connection first.
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# If the internet LED is off, check your DSL LED first. If your DSL LED is also off, please refer to Note 1. If your DSL LED is GREEN ON, check your internet configuration.
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== Broadband (DSL) light ==
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== Internet ==
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The Broadband light should become '''steady green''' within a few minutes after power-up or restart, indicating that the unit has detected a DSL signal and is able to synchronize with it. It indicates that the unit is ''in sync''.
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The internet light is '''steady green''' when the NCF authentication server has accepted your modem's login and password and is ready to provide internet service via DSL to your modem. If the light remains '''unlit''', there is a problem.
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During the process of obtaining DSL synchronization, the Broadband light will flash green. If it flashes indefinitely, there is a problem.
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If your unit was able to log in earlier and you have not made any changes, an unlit light likely means that there is a temporary network problem (at the Central Office or NCF) making it temporarily impossible to check your login and password. In this case it is best to just wait for the problem to be fixed. You may need to power-cycle or restart your modem for it to notice that service has been restored. If you can get online elsewhere (by dial-up, at a friend's home or at an office or library), you can check the NCF web site to see if others are experiencing problems. If not, report the problem, although network-wide problems are almost always noticed quickly.
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If you previously had a working connection and nothing has changed at your location (eg., no new devices attached to your phone line), try power cycling your modem (see above). If that doesn't work, likely it's an external problem and it is best to wait 10 minutes and see if it clears up. Sometimes the modem needs to be power-cycled for it to notice a line that has returned to service and to connect to it.
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If you are installing your modem for the first time and the DSL light is green but the Internet light is unlit, likely your unit has not been configured with a correct login and password. Check the configuration instructions for information about configuring:
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If you are installing the modem for the first time, here are possible solutions:
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*[[Modem Configuration (DSL) TP-Link 8816]]
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* Make sure there is '''no filter''' on the line that connects your modem to the phone line. The modem must be plugged directly into the phone line.
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*[[Modem Configuration (DSL) TP-Link 8901G]]
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* Make sure all other devices, including telephones, answering machines, fax machines and security alarms at your location are connected through [[Modem Installation (DSL)|DSL line filters]].
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*[[Modem Configuration (DSL) TP-Link 8950ND]]
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* If problems persist, try temporarily disconnecting all other devices from your phone line as a phone or even a filter that is failing can cause interference.
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*[[Modem Configuration (DSL) TP-Link 8951ND]]
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*[[Modem Configuration (DSL) TP-Link 8961ND]]
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If you can find a working internet connection (by dial-up, at a friend's home or at an office or library), you can check online with NCF to see if anyone else is experiencing problems. If not, it is best to [http://www.ncf.ca/ncf/support send a problem report] to the NCF office for further action.
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*[[Modem Configuration (DSL) TP-Link 9970]]
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== Internet light ==
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The internet light is '''steady green''' when the Central Office has accepted your modem's login and password and is ready to provide internet service via DSL to your modem. If the light remains '''red''' or '''unlit''', there is a problem.
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If your unit was able to log in earlier and you have not made any changes, a red light likely means that there is a temporary network problem (at the Central Office or NCF) making it temporarily impossible to check your login and password. In this case it is best to just wait for the problem to be fixed. You may need to power-cycle or restart your modem for it to notice that service has been restored. If you can get online elsewhere (by dial-up, at a friend's home or at an office or library), you can check the NCF web site to see if others are experiencing problems, and if not, report the problem, although network-wide problems are almost always noticed quickly.
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If you are installing your modem for the first time and the DSL light is green but the Internet light is red, likely your unit hasn't been configured with a correct login and password. Check the [[Modem Configuration (DSL)|configuration instructions]] for information about configuring.
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== Beyond the lights ==
== Beyond the lights ==
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Lights can indicate only a small amount of information about your modem. To learn more about what your modem is doing, you can [http://www.ncf.ca/ncf/home/modems/dslUsage.jsp view your DSL usage log] (this link is also available from the NCF StartPage, under 'Internet Access').  Often the pattern of connect/disconnects will reveal more information.
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Lights can indicate only a small amount of information about your modem. To learn more about what your modem is doing, you can [http://www.ncf.ca/ncf/home/tools/dslUsage.jsp view your DSL usage log] (this link is also available from the NCF StartPage, under 'Internet Access').  Often the pattern of connect/disconnects will reveal more information.
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It is also possible to [[DSL modem web interface|log into your modem]] (there is a computer with a UNIX operating system in there) using a web browser, and then view its event log. For information about the modem's event log, consult the [[Modem manuals (DSL)|modem manual]] for your modem model.
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== Background information: Stages of DSL Connection-Making ==
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{{:Stages of DSL connection-making}}
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It is also possible to [[DSL modem web interface|log into your modem]] (there is a computer with a Linux operating system in there) using a web browser, and then view its event log. For information about the modem's event log, consult the [[Modem manuals (DSL)|modem manual]] for your modem model.
==See also==
==See also==
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*[[Stages of DSL connection-making]]
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*[[About DSL modem lights - Sagemcom modems]]
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*[[About DSL modem lights - SmartRG modems]]
*[[About DSL modem lights - SpeedTouch modems]]
*[[About DSL modem lights - SpeedTouch modems]]
[[Category:DSL]]
[[Category:DSL]]

Current revision as of 20:20, 29 December 2017

The operational status of your TP-Link DSL modem is indicated by lights (LEDs). TP-Link modems have lights to indicate power, the status and activity of the DSL line, and the status and activity of connections to your computer, whether by ethernet or by wireless.

TP-Link modems have lights on the front (8901G and 8950) or the top (8816, 8951, 8961 and 9970).

Information is communicated by whether the lights are on, off or flashing. Activity on a line is often indicated by flickering lights, when the line is active.

This article includes a summary of how to read the lights on TP-Link modems.

Contents

8816 Single Ethernet Port ADSL Modem

Power
Should be solid green. If it is unlit, there is a power problem or the unit is broken. Check that the modem is plugged in and switched on.
LAN (Local Area Network)
Should be solid green if a computer is connected to the ethernet port.
ADSL (Asymmetric Digital Subscriber Line)
Flashes green when the modem is synchronizing, will be solid green once synchronization has occurred.
Internet
Will illuminate green when authentication has been successful, and will flash to show data traffic.

8901G 4-Ports + "G" Wireless ADSL Modem & 8950ND 4-Ports + "N" Wireless ADSL Modem

Power
Should be solid green. If it is unlit, there is a power problem or the unit is broken. Check that the modem is plugged in and switched on.
ADSL (Asymmetric Digital Subscriber Line)
Flashes green when the modem is synchronizing, will be solid green once synchronization has occurred.
Internet
Will illuminate green when authentication has been successful, and will flash to show data traffic.
WLAN light (Wireless Local Area Network)
Will be solid green or flashing green if a computer is connected to the wireless.
Numbers
These lights correspond to Ethernet ports connected. These will show a solid green light when a computer is connected to the corresponding port by Ethernet cable and will flash to show data traffic.

8951ND 4-Ports + "N" Wireless ADSL Modem

Power
Should be solid green. If it is unlit, there is a power problem or the unit is broken. Check that the modem is plugged in and switched on.
ADSL (Asymmetric Digital Subscriber Line)
Flashes green when the modem is synchronizing, will be solid green once synchronization has occurred.
Internet
Will illuminate green when authentication has been successful, and will flash to show data traffic.
WLAN (Wireless Local Area Network)
Will be solid green or flashing green if a computer is connected to the wireless.
WPS light (lock symbol)
Disregard
Ethernet
These lights correspond to ethernet ports connected. These will show a solid green light when a computer is connected to the corresponding port by Ethernet cable and will flash to show data traffic.

9970 4-Ports + "N" Wireless ADSL/VDSL Modem

  1. If the DSL LED is off, check your internet connection first.
  2. If the internet LED is off, check your DSL LED first. If your DSL LED is also off, please refer to Note 1. If your DSL LED is GREEN ON, check your internet configuration.

Internet

The internet light is steady green when the NCF authentication server has accepted your modem's login and password and is ready to provide internet service via DSL to your modem. If the light remains unlit, there is a problem.

If your unit was able to log in earlier and you have not made any changes, an unlit light likely means that there is a temporary network problem (at the Central Office or NCF) making it temporarily impossible to check your login and password. In this case it is best to just wait for the problem to be fixed. You may need to power-cycle or restart your modem for it to notice that service has been restored. If you can get online elsewhere (by dial-up, at a friend's home or at an office or library), you can check the NCF web site to see if others are experiencing problems. If not, report the problem, although network-wide problems are almost always noticed quickly.

If you are installing your modem for the first time and the DSL light is green but the Internet light is unlit, likely your unit has not been configured with a correct login and password. Check the configuration instructions for information about configuring:

Beyond the lights

Lights can indicate only a small amount of information about your modem. To learn more about what your modem is doing, you can view your DSL usage log (this link is also available from the NCF StartPage, under 'Internet Access'). Often the pattern of connect/disconnects will reveal more information.

It is also possible to log into your modem (there is a computer with a Linux operating system in there) using a web browser, and then view its event log. For information about the modem's event log, consult the modem manual for your modem model.

See also