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The troubleshooting procedures in this chapter are
arranged according to system configuration.
5.1 Configuration 1
In Configuration 1, you have fiberoptic and/or
copper cable connecting the MX330A-C to the
MX330A-D.
If you change the postion of a slide
switch or disconnect and then
reconnect a cable during operation, an
abnormal indication results. Make sure
that at least one terminal connected to
each terminal multiplexor is on-line and
active.
5.1.1 G
M
ENERAL
ALFUNCTIONS
All LEDs are off except for the power LED.
• The controller is turned off or not operating properly.
Make sure the controller is on and functional.
• Faulty copper link between the controller and the
MX330A-C. Check the copper cables and
connectors between the controller and the
MX330A-C. Be sure the cable length does
not exceed the maximum length.
One or more of the four controller port DATA
LEDs in use is off.
• Faulty port connection. Check the copper cable
and connectors between the controller and the
MX330A-C. Be sure that at least one terminal
connected to each terminal multiplexor is on-
line and active.
5. Troubleshooting
NOTE
CHAPTER 5: Troubleshooting
5.1.2 F
C
IBEROPTIC AND
MX330A-C
MX330A-D
THE
AND
The slide switches on both units must
be in the same position, according to
the operating mode (F/O or COPPER).
The slide switch is set to F/O, but the F/O TX LED
is off.
• Replace the MX330A-C unit.
The F/O TX LED is on and the RX LED is off.
• There is a faulty fiberoptic link between the MX330A-
C and MX330A-D. Check the connection
between the units. Be sure the cable length is
not over the maximum length and at least one
terminal connected to each multiplexor is on-
line and active.
The slide switch is set to COPPER and the
COPPER LED is off.
• There is a faulty copper link between the MX330A-C
and MX330A-D. Check the copper connection
between the units. Be sure the cable length is
not over the maximum length and at least one
terminal connected to each multiplexor is on-
line and active.
• Check the copper cables and connectors
between the MX330A-D and the terminal
multiplexors. Be sure the cable length is not
over the maximum length and at least one
terminal connected to each multiplexor is
on-line and active.
C
B
OPPER
ONNECTION
ETWEEN
NOTE
17
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