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Be sure the MUTE annunciator is off. If not, press Imute |.
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Place aclear call, (see PLACING CLEAR CALLS above).
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Be sure the 2.4 annunciator is on. If not, press the IMODEM |key until
2.4 is displayed.
Press IHALF DUPLE)^. Be sure the HD annunciator comes on. If not,
press [half duple^ again.
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Tell the other person you want to establish asecure conversation.
N O T E
If one terminal is operating in the half duplex secure mode, the other terminal con¬
verts to half duplex automatically upon entering the secure mode.
Press IsecureI. The message display shows:
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)
T O N E
H D
V O I C E
2 . 4
8 5 9 6 4 - 6 9
N O T E
The terminal takes approximately 15 seconds to enter secure mode. During this
time, the terminals exchange and validate authorization information. The terminal
determines if both users have authorized access to the secure mode. While this
occurs, the terminals disable both handsets.
6 - 9
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