Revision 1.3a
Page 13
Table 5-1 troubleshooting procedures
Condition
Solution
Power LED off
XLR 5xx
-1 Verify that the DC adapter’s cable plug is connected
to an operational power source (+100 ~ +240V AC).
-2 Verify that that DC adapter is operational
XLR 5xxA
Verify that the AC power cable plug is connected to an
operational power source (+100 ~ +240V AC).
Console connection
disabled
Verify that the console cable’s DB-9 connector and RJ-45 jack is
plugged firmly. Verify that communication options are correctly set.
2BASE-TL Port’s LEDs
OFF with no blinking
In normal operation (a pair of devices, one set as CO, the other set asRT), 2BASE-TL
LED will be off if there is no copper pair connected to the port (or if a copper pair is
connected at the port but is notterminated at an operational remote device or if the
copper circuit isfaulty (i.e. excessive loss or open circuit))
1. Verify that the remote device is operational and the mode is set as
different mode from the device itself.
2. Verify that copper pairs are wired correctly in the copper pair. (refer
to figure 2-4 )
2BASE-TL Port’s LED
blinking but not
entering ON state
1. Verify that the line state is normal (state, such as distance). If the
distance of the line is too long to sync, it may fail to link up.
LINK / RX LED
In normal operation, the network LINK LED is on when a link is
detected between the N55x and a remote device.
1. Verify that the CAT5 cable is connected properly to a 10/100Mbps
port on an operational Ethernet device.
TX LED
In normal operation, the network RX LED, TX LED, or both blink when the device
detects traffic on the Ethernet port. If the these LED is off and the Network LINK LED
is on:
1. Verify that there is Ethernet traffic on the network connection.