Operating instructions

CHAPTER 2 TECHNICALLY SPEAKING
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 Each unused communication port requires a terminator, available from NTI.
The student computers connect to a unit with connectors for the keyboard, mouse and video, as well as two
communication ports and two video ports. Up to four computers are chained through the communication and
video ports to the central unit. The last student unit on the chain requires a terminator on the unused
communication and video ports. NTI has these terminators available upon request. The last unit in the chain
must be within 50 feet of the central unit.
 The keyboard and mouse ports support 6-pin miniDIN female connectors for PS/2 systems. For serial
mouse systems, a converter is available.
 The video import ports are 15-pin HD female connectors for VGA monitors and connect to the instructor’s
central unit.
 The video output port connects to the next computer in the chain with a 15-pin HD male connector. The
unit supports a video bandwidth of 150 MHz and 1600x1200 resolution.
 The units require no external power – they draw power from the keyboard and mouse ports on the CPU.
 The instructor can “control” the classroom with on screen display (OSD) commands. From the Main Menu,
the instructor can go to submenus to perform various tasks, as follows:
Main
Menu Item Description
INHIBIT Displays the Inhibit menu to enable or disable keyboard and
mouse of one or more students. Students can see their own video.
BLANK Displays the Blank menu to disable the keyboard, mouse and
video of one or more students. The student monitor goes blank.
BROADCAST Displays the Broadcast menu to select a video source and send it
to any or all of the student monitors while disabling the student
keyboards and mice. The instructor can broadcast their own
video to students or broadcast a student’s video to other students.
SCAN Displays the Scan menu to let the instructor monitor the active
student videos without interfering with the students’ work.
OVERRIDE Displays the Override menu, from which the user can select
which computer to control and a control source. This lets the
teacher control a student’s computer or lets a student control
another student’s computer.
NAME ENTRY Displays a list of numbers corresponding to connected computers
with fields to enter students’ names.
STATUS Displays current system status:
First column
• L = Local mode
• S = Screen Save Mode
• R = Remote connection
Second Column
• B = Blanked
• I = Inhibited
Third Column
• *= Viewing own video
• D = Receiving video from another source
• S = Student is OVERRIDE source
SETUP Gateway menu to set up scan mode time, screen saver set up, and
diagnostic mode menu.