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Chapter 3 Hardware Troubleshooting 29
BCM450 Troubleshooting Guide
To test the main unit
If you have the digital station feature included in your installed keycode, use the following test to
ensure the main unit is operating properly:
1 Go to an extension that is connected to the RJ-21 telephony connector on the main unit.
2 Check for a dial tone.
3 Use this extension to make a call to another extension on the system.
4 If this system has an expansion unit with a media bay module (MBM) that supports
extensions, repeat steps 3 and 4 for an extension connected to the expansion unit.
5 Go to an extension that has access to one of the lines on the main unit.
6 Select the line or line pool to which the line belongs.
7 Check for a dial tone.
8 Make a call using the line or line pool.
9 If this system has an expansion unit 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.
To troubleshoot the main unit
If a test fails, use the following procedure:
1 Verify that any nonfunctional feature is 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 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.
To test the expansion unit
Use the following test to ensure the expansion unit is operating properly:
1 Make sure that the BCM450 system is fully booted.
2 Check the power and status LEDs on the MBM that is inserted in the expansion unit. Both
LEDs must be solid green. If either LED is not solid green, a problem exists with the MBM or
the expansion unit.
3 If the expansion unit has an MBM that supports extensions, go to an extension that is
connected to the MBM.