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Black Box®LB1350A/LB1351A
16
If the register bit is a 1, the priority is high and if 0, the priority is low.
Thus the DSCP value classifies the packet service level.
When more than one scheme is enabled, priority conflicts are resolved by the
following order : 802.1p based priority overrides port based priority and TOS based
priority overrides 802.1p based priority
15- TROUBLESHOOTING
Problem Indication Corrective Action
No power Power LED not
lit
Check that the power supply cable is firmly
connected to the device and the wall
power socket.
Check that the AC input power source is
between 100 and 240VAC.
Network problems No
communication
on network
On the “mode setup switches”, check that
S9 is in the UP position. ( converter normal
operation mode )
Reset the device using S9
Any problem related to port
4 (3) or F/O port
Set device to TEST mode (S8 Down), reset
device (S9).If problem not solved remain in
TEST mode and perform troubleshooting.
TP link not working Link LED not lit On the “mode setup switch” move S9 to
the DOWN position, and move it back to
the UP position after one second.
Check that the connected device is
working properly at 100Mbps or 10Mbps.
Check that the connection cable is well
connected at both ends.
TP link not working at 100M
when Black Box®LB1350A
LB1351A connected to
100Mbps or 10/100Mps
device
Both Link LED
and
100BaseTX LED
not lit
On the “setup mode switches”, check that
respective switches S1 thru S4 are in
down position ( Auto-Negotiation mode )
Interchange between the suspected port
and another port 1 thru 4
Check that the connected device is
working properly at 100Mbps.
Check the interconnection between the
Black Box®LB1350A LB1351A and the
device.
Use for suspected link the preferred port
and force it to 100Mbps (S4 up, S5 down)
TP link not working at 10M
when the Black
Box®LB1350A LB1351A
connected to 10M device
(copper side).
Link LED not lit If suspected port is 1 thru 3, move
respective switch (S1 thru S3) to up
position , if port 4 – move S4 up and S5 up
Reset the device using S9
Check that the connected device is
working properly at 10Mbps