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Troubleshooting
This is an old revision of the document!
The display can be used for troubleshooting the ADSL connection. The dots in the display indicate:
. (one dot)
Power on, idle - no DSLAM has been detected.
.. (two dots)
Power on, idle - DSLAM has been detected and ADSL training has been attempted to it.
… (three dots)
DSLAM located and connection has been establised
To troubleshot the ADSL connection:
The dots remain in the display until the unit is restarted. If there are two dots in the display you know that the modem has been in contact with a DSLAM since you turned the unit on.
If the modem has not been in contact with a DSLAM at all (one dot) you need to check the cable connected to the LINE port of the unit.
If the modem has been in contact with a DSLAM (two or three dots) but could not maintain a connection, or could not transmit data on the connection, then you need to check:
When the modem starts to negotiate, one rolling figure-of-eight is displayed on the frontpanel. From this stage one can follow the progress on the ADSL Status page, in the ADSL line state report.
If this first ADSL training step is successful, it is followed by a second figure-of-eight on the display, then a third, at which the ADSL link normally will be successfully established. By this time you should have a full frequency diagram on the ADSL Status page, the ADSL line state should be Active and the transmit and receive speeds (displayed on the ADSL Status page as well) should be as expected. You should also now get a “line: link up” message in the system log.
The display now shows one rolling figure-of-eight, accompanied by the text ”IP
”, which indicates that the modem starts getting its IP address.
This should not go on for very long, after some seconds (up to a minute) it should have got its IP address, and the display will shift to one of the steady texts Hi
, Lo
or AC
.
If this never seems to happen, see the internet problems page for how to carry on the troubleshooting.
It may be a problem with the VPI/VCI settings or some DHCP or PPPoE/PPPoA problems.