Nortel BayStack 450 Switch, Installation Manual

Page: 98 / 142

98 Troubleshooting
Nortel Business Communications Manager 450 1.0
Installation — System
NN40160-301 01.04 Standard
July 2009
Copyright © 2006-2009 Nortel Networks
9 If this system is connected to an expansion cabinet with an MBM that
supports lines, repeat steps 6 to 8 with an extension that can access one of
the lines connected to the expansion unit.
--End--
Troubleshooting the main unit
If a test fails, use the following procedure to troubleshoot the main unit.
Procedure steps
Step Action
1 Verify that no nonfunctional features are included in your installed keycode.
2 Check the wiring to the main unit and to the MBMs. Make sure that the
cables are properly seated and are connected to the correct ports.
3 Reboot the BCM450 system.
4 Check the LEDs.
5 Use Element Manager or the Telset Administration feature to check the
programming for the lines or extensions that failed the call test.
6 If the programming is incorrect, use the Backup and Restore Utility to load
a recent backup of system programming. If a recent backup is not available,
correct the programming using Element Manager or the Telephone
Administration feature.
--End--
Testing an MBM
Use the following procedure to test an MBM installed in the main unit or
expansion cabinet.
If you are experiencing an issue with an FEM, ensure all DIP switches are set
to the On position. For more information, see
Fiber expansion module
configuration (page 47) .
Procedure steps
Step Action
1 Check the Power and Status LEDs on the MBM. Both LEDs must be solid
green. If either LED is not solid green, a problem exists with the MBM.