GS4000 Installation Guide Revision 4.00
520-10-026-30X
1-44
Name
Type Or Color
Role
Action Status
STATUS
CODE
7SEG
：
Green
Shows the condition of a
device.
(7 SEG, decimal with 2
digits)
ON
：
The code (00
～
99) to tell the condition of a device
is shown. (The code shows the different contents when
POST LED is lit.)
MEMORY
CARD 0
ACC
LED
：
Green
ON
：
The memory card 0 is being accessed. (Pulling out
the memory card from a device is prohibited.)
OFF
：
The memory card 0 is being idled. (Inserting or
pulling out the memory card into or from a device is
allowed.)
MEMORY
CARD 0
PRI
LED
：
Green
Shows the condition of the
memory card 0.
ON
：
A device was started up as the primary.
OFF
：
A device was started up as the secondary. Or the
memory card 0 is not used.
MEMORY
CARD 1
ACC
LED
：
Green
ON
：
The memory card 1 is being accessed. Pulling out
the memory card from a device is prohibited.
OFF
：
The memory card 1 is being idled. (Inserting or
pulling out the memory card into or from a device is
allowed.)
MEMORY
CARD 1
PRI
LED
：
Green
Shows the condition of the
memory card 1.
ON
：
A device was started up as the primary.
OFF
：
A device was started up as the secondary. Or the
memory card 0 is not used.
Green ON
：
Interface lines are working.
（
Note
4
）
LINK/ACT
LINE ERR
LED
：
Green
／
Yellow
Yellow ON
：
A failure was detected in an interface line.
T/R
LED
：
Green
Shows the action status of
CONSOLE (10BASE-
T/100BASE-TX).
Green ON
：
Packets are being forwarded/received. (Note
5
)
Note 1: When the lamp test switch is pushed, all the LEDs except those on the locked out boards are lit.
Note 2: The switches are embedded into the BCU front panel. Use tools such as a fine-edge driver when pressing them.
Note 3: Switching of a system is done only when the BCU ALTERNATE switch of the active BCU is pressed.
Note 4: If you are using a wrong type of a twisted-pair cable, there is a chance that the LED will be lit. If so, change the
twisted-pair cable to the correct type referring Chapter 3.
Note 5: Regardless of the state of the line, the LED will be lit if the system detects date being sent or received. Because of
this, there is a chance that the LED will be lit even if the cable is not connected on the destination side.
WARNING: WHEN PRESSING THE SWITCHES EMBEDDED INTO THE BCU FRONT
PANEL, DO NOT USE THE TOOLS SUCH AS THOSE WITH FINE EDGES
WHICH ARE EASILY BROKEN, OR THINGS SUCH AS PINS OR PAPER
CLIPS, WHICH ARE DIFFICULT TO BE REMOVED ONCE THEY ARE
DROPPED INTO THE CONCAVES WHERE THE SWITCHES ARE LOCATED.
OTHERWISE, YOU MIGHT FACE AN ACCIDENT SUCH AS A FIRE OR AN
ELECTRIC SHOCK.
NOTE: The status of some actions related to BCU is indicated by the LED on the front
panel of the device. See the section “1.1 Chassis” for its outer appearance, etc.
*
NOTE: Do not install optional components from a GR4000 or GS4000 into devices
other than another GR4000 or GS4000. Doing this causes a fire or an electric
shock.
