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Status LEDs - PBXgateway II and Branch Office EXTender 6000
When the units are powered-up, a series of self-diagnostic tests are performed and displayed as a series
of LED blinks.
Power Up Sequence
The following steps are performed automatically when the PBXgateway II and Branch Office units are
turned on.
DRAM Tests – Checks the internal DRAM (Dynamic Random Access Memory) chips.
Selftest – Diagnostic routine to verify operation of various hardware components of the unit.
ROM Countdown – A series of LED blinks that display the process of loading the Runtime image.
Runtime Image – This is the software executable file.
Note: The EXTender 4000 utilizes only one LED, labeled "Status" to display results of all four tests. (see
page 146 for more information)
Step #1 DRAM Tests
When the unit is powered on it runs four DRAM tests. The Power LED flashes green while these tests
run. If you look closely, the Power LED flashes at slightly different speeds as the different tests run. If
the tests pass then the Power LED goes solid green. If any of the tests fail then all four status LEDs go
solid red and the EXTender halts. (Refer to the System Status LED chart on the next page for more
information.)
Note: The DRAM tests are only run when the unit is powered on. Rebooting the device without first
power cycling it will immediately start the selftest diagnostics.
PBXgateway II System Administrator's Guide
142
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