12
The
Reboot
and
Shutdown
functions are activated by pushing the red function keys located
underneath the
Function Bar
of the screen. Both functions preserve all the data included in
the controller except the statuses and left quantities of programs.
3.
THE INTERNET COMMUNICATION
The
DREAM 2
has 3 options for accessing the internet:
Using a
Cellular Modem
supplied by Talgil and plugged into the CPU board.
Using an
Ethernet card
for connecting to a
L
ocal
A
rea
N
etwork.
Using a
USB Netstick
plugged into the motherboard.
The controllers after power up will use their internet link to login to the service and stay online.
On the other end there are the users that want to access the controllers, they got two options:
one option is the software package called
CONSOLE
and the other is an internet site called
SPOT
.
Both options enable the users to login to the
SERVICE
whose task is to coordinate between
users and their controllers. Additionally the
SERVICE
contains a large
DATA BASE
that stores
all the information about all the controllers and the
ADMINISTRATION
software that decides
about who is permitted to access which controller.
When a controller tries to login, the
SERVER
will ask its
ID number
and its full Image
contents. If the Image structure is correct, the controller will be permitted to login, otherwise it
will be rejected. If this is the first time for this controller to login, the
SERVER
will include its ID
in the list of recognized controllers and will allocate for it space in the
DATA BASE.
Once
logged in,
the
SERVER
will keep asking the controller repeatedly “What is new?” in order to
keep the
DATA BASE
up to date, so that users interested in some information about the
controller, would be able to find it
in the
DATA BASE
.
The
drawing
to
the
right
demonstrates the physical layout of
the communication between users
and targets (controllers) in the
DREAM 2
system.
The procedure of setting up the
internet communication is explained
below.
Selecting
the
mode
of
communication and setting the
needed parameters is done at the
System Manager
screens.
