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5-6
@
Press
I
SECURE
I .
The message display will show:
' '°'"
(j)
The STU 111/SECTEL will take approximately 15 seconds to
enter the secure mode. During this time, both terminals are
exchanging and validating authorization information to
determine if you AND the person you are talking with have
authorized access to the secure mode. While this is occurring
both handsets are disabled.
NOTE
If the terminal classifications allow for a secure call. but the highest
classification levels do not match, the terminals will default to the highest
common classification level
of
the two terminals.
@
When the secure mode is established, the SECURE
annunciator will appear, and the top line of the message
display will show the classification level. The bottom line of
the message display automatically scrolls through the
authentication, and CIM (if any).
NOTE
One person may talk at a time in half duplex. The speaker will have a "T"
(transmit) displayed while the listener has an "R'" (receive) displayed. When
"T" or "R" is not displayed, the line is idle and either party may begin
speaking.
@Terminating the secure half duplex call is accomplished by
placing the handset in the cradle, and pressing
I
HALF DUPLEX
I .
Ensure the HD annunciator is off.
Receiving a voice call in the secure mode occurs automatically
when your STU 111/SECTEL has been configured as autosecure
(see Chapter 3, Installation).
G)
Ensure your CIK is inserted and turned one-quarter turn
clockwise.
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