IBM ATM OC-3c - Manual (Page 47)

Post-Installation Checks 6-7
Checking the Power Supply
Check the MGMT LED on the Switch. If the MGMT
LED is not lit there is a power supply problem. Try the
following troubleshooting procedures:
1 Check that the power supply is plugged into the
device, using a power outlet that is known to be
working.
2 Check that the main power supply switch on the wall
is set to the ON position.
3 Check and if necessary change the fuse on the Switch
or plug, and then power-up the Switch. Refer to the
user guide that accompanies your Switch for details
about fuses and safety instructions.
4 Replace the power cable with a cable known to be
working, and power-up the Switch.
5 Contact Technical Support. Refer to Appendix E.
Checking that the ATM Module is Installed Correctly
Power up the Switch and check that the Module LED
(or Downlink Status LED) on the front of the Switch is
lit green.
If the MGMT LED is not lit green, you should remove
and then re-install the ATM module.
You can confirm that the ATM Module is installed
correctly by accessing the local management screens, as
described in “Logging On” on page 7-3. If the ATM
Module is installed correctly, the ATM CONFIGURATION
option appears in the Main Menu.
If the ATM CONFIGURATION option does not appear:
■ You may have an incompatible version of the
software. Refer to the “Release Notes” for details
of which version of the software should be
downloaded.
■ It could be that the ATM Module is still initializing.
If the ATM Module is still initializing, the MGMT
LED flashes green.
Checking the Physical Connections
This section assumes that the ATM Module is correctly
installed.
Check that the Link Status and Far End Status LEDs on
the ATM Module are lit green. If one or both of the
LEDs is not lit, there is a problem with the physical
connection. Follow the troubleshooting information
below:
1 Ensure that both devices are powered-up, and that
the ports at both ends of the link are enabled.
2 Ensure that the cable is securely connected to the
port at both ends of the link.
3 Check each end of the cable to ensure that each of
the fiber connectors is correctly connected. If your
cable connectors can be reversed, you may need to
reverse the TX and RX cable connectors at one end of
the link.
Some cable connectors have been designed so that
they cannot be fitted incorrectly. Never use excessive
force to connect cables.