CSX7000 Guide
24 CyberSWITCH
P
LATFORM
M
ULTIPLEXOR
The multiplexor is an integral part of the CSX7000. It allows multiple groups within the CSX7000
to share a single monitor, keyboard and diskette drive. The multiplexor card operates on the
concept of channels, with one channel for each group in the platform. The multiplexor connects
each of the groups to the monitor, keyboard and diskette drive through the individual processor
module of the particular group. In order to select these multiplexed peripherals for a specific group,
use the front panel BC GROUP push buttons. When a group is selected, the multiplexor enables the
signals for the monitor, keyboard and diskette drive to pass through the selected processor module.
One flexible disk drive is required per platform to service all of the processors in that platform.
I
NTERIOR
LED
S
A strip of LEDs is located directly above the multiplexor assembly and adjacent to the dual fans on
the inside of the platform. (Refer to the illustration on
page 20
). These LEDs provide information
about the cards in individual slots, as well as the groups plugged into the platform’s backplane.
The numbered, circular LEDs represent the slots, and the square LEDs represent the connections
between pairs of slots.
•
The circular LEDs have three states: on, off or flashing. If the LED is on (green), it indicates power
to the specific slot. If it is flashing, it indicates the slot is part of a front-panel selected group. If
it is off, there is no power to the slot.
•
The square LEDs are either on or off. If on (amber), it indicates a connection between the pairs
of slots which are adjacent to the LED, thus forming a group including the two pairs of slots. If
off, there is no connection.
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
GREEN LIGHT = SLOT POWER ON FLASHING GREEN LIGHT = GROUP SELECTED AMBER LIGHT = SLOTS CONNECTED
