Black Box 5000 - Manual (Page 38)

Multiserver 5000
36
On the front of the unit is a liquid-crystal display
(LCD). After the unit completes its internal tests,
the clock will start and the LCD will display a
message.
The LCD backlight will also flash. This indicates
that there is alarm message, probably Local Link
reset A1 . This means that the default link
channel has been reset. The backlight will
eventually time out. See Section 13.1, General
LCD/Keypad Information
if you wish to stop the
backlight from blinking before it times out.
4.5 Checking the CCM Indicators
Once the self-test has been completed, the CCM
indicators on the front of the unit should display AT
on and BO off. The indicators for port A1 will be
flashing, unless it is correctly attached to an
interconnect link. The indicators for ports A2 to A6
will probably be off, though any or all may flash.
This will depend on how each of the ports is
configured. Figure 4-7 shows the most-probable
status of your indicator lights when you power-up
the Multiserver for the first time.
If the CCM indicators are lit differently:
• Refer to Table 4-1 on the next page for indicator
interpretation,
• Check that the CommPak cartridge is fully
seated, and
• Make sure that the wall outlet is operational.
LCD DISPLAY
Multiserver 5000 Time: 00:01:23
Figure 4-6. Default LCD message after power-up.
LED on
LED off
LED blinking
CCM indicators
AT BO A6 A5 A4 A3 A2 A1
Normal Status
On Power Up
Key:
A1-A6 = port numbers
BO = buffer overflow
AT = active mode
Figure 4-7. CCM indicators at the time of power-up.