Setting Up Of A Secure Call On The Basis Of A Kdc Call - Philips SPENDEX 40 Operating Manual

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SPENDEX 40 UA 8251/00
OPERATING MANUAL
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5.4 Setting up of a Secure Call on the Basis of a KDC Call Variable
This section describes the actions to be performed in order to change
from a clear call to a secure call based on a KDC call variable. The
transition to a secure call based on a KDC call variable is possible
only if the terminal at the other end (SPENDEX 40 or STU-II) is
provided with its KDC unique variable. The initiative to go over to a
secure call can be taken only by the calling party.
Actions
Start conditions:
- CIK modules connected
- Clear call connection
C a l l i n g t e r m i n a l :
1. Press KDC key.
2. Dial in ID number of
c a l l e d p a r t y.
3. Press SECURE push
b u t t o n ( w i t h i n
5 seconds).
Secure speech possible (see
Note 3)
Calling terminal
LED
Display
" NNNNNNN"
"ID XXXXX"
"ID DDDDD"
"SECURE ?"
(See Note 1)
"WAIT
"SYNCAQ "
"SYNC ? "
"CRYPTO "
Called terminal
(if SPENDEX 40)
LED
Display
"PLAIN
"PLAIN
"PLAIN
"WAIT
"* EKD
"SYNC
"CRYPTO
(See Note 2)
D D D D D ID number (D = 0...9)
Note 1: If one does not wish to utilise the selected ID number, but
wants to select another ID number, then the selected ID
number can be cancelled by pressing of the KDC key twice in
succession. In the display, "NO ID " then appears.
Note 2: If the attempt to achieve synchronisation fails, both
t e r m i n a l s r e v e r t a u t o m a t i c a l l y t o c l e a r t r a f fi c ( b o t h
d i s p l a y s e x h i b i t " P L A I N " ) .
Note 3: A rapid intermittent signal during conversation indicates
pre-emption; finish conversation immediately and go on hook.
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