Figure 3-10.—Example of a teletype.
commands to communicate in the system operating
indicate faults and perform self-tests on the remote unit.
manuals (SOMs) and the documentation used for
testing. The keyboard used with an IOCC is similar to
a stand-alone keyboard except there are no special
function and control keys. Figure 3-10 is an illustration
of a teletype used with a computer. The teletype has
two levels of controls and indications. They are as
follows:
l Initiate computer operations
l Control computer operations
REMOTE CONSOLES AND
REMOTE OPERATOR CONTROL
UNITS
Remote consoles and remote operator control units
(ROCUs) have controls and indicators you can use to
initiate, control, and monitor computer operations. You
cannot power the computer set up/down from this unit.
From some remote units you can initiate, control, and
monitor up to two CPUs. Other remote units only allow
you to initiate, control, and monitor one CPU at a time.
Some remote units have a built-in microprocessor to
Remote units can also indicate an overtemperature
condition. More sophisticated remote units can control
their own power supply, indicate if the computer is in a
battle short condition, and monitor and indicate
individual module status.
Remote units can be located from 150 to 300 feet
from the computer.
Remote consoles monitoring
capabilities include switch settings, hardware
availability, halts, jump stops, breakpoints on some
computer sets, and operator input. Remember, key
settings can interact with computer software.
Depending on the technology of the remote unit, it can
have up to four levels of controls and indications as
follows:
Self-testing and fault indications
Initiate computer operations
Control computer operations
Monitor individual
computer status
module status and overall
3-13
