Operator`s manual

The console bulkhead assembly contains the following controls and

indicators:

Power-Up mode switch — This three-position rotary switch

determines how the system responds at power-up:

Language inquiry mode (the position indicated by a

proﬁle of a face) causes the system to display a lan-

guage selection menu at power-up if your console ter-

minal supports multiple languages. Also, if a default

boot device has not been selected, this mode causes the

system to issue a list of bootable devices and prompts

you to select a device from the list. Once a device is

selected, the system autoboots from that device each

time you turn it on.

Run mode (the position indicated by an arrow) is the

normal operating setting.

Loop back test mode (the position indicated by a T in a

circle) causes the system to run loopback tests on the

console serial line at power-on. This setting requires

special loopback connectors and is for Digital Customer

Services use only.

Baud rate select switch — This switch sets the system baud

rate to match that of the console terminal. The factory setting

is position 5 (9600).

Modiﬁed modular jack (MMJ) — This console terminal connec-

tor provides the connection for the console terminal.

Light-emitting diode (LED) — This display shows the testing

sequence during power-up.

System Overview 1–15