Setting Up Of A Secure Data Connection - Philips SPENDEX 40 Operating Manual

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SPENDEX 40 UA 8251/00 OPERATING MANUAL
5.6
Setting up of a Secure Data Connection
This section describes the actions to be performed in order to change
from a secure call to a secure data connection with either a
SPENDEX 40 or STU-II terminal. The initiative to go over to a secure
data connection can be taken only by the calling party.
Actions
C a l l i n g t e r m i n a l
Called terminal
(if SPENDEX 40)
LED
D i s p l a y
LED
Display
Start conditions:
- Data terminal equipment
connected and switched on
- Secure call connection
"CRYPTO " "CRYPTO "
Calling terminal:
1. Press DTE key.
X
"SYNCAQ "
"SYNC ? "
"CRYPTO "
(See Not*
(Keep hai
"SYNCAQ "
"SYNC ? "
"CRYPTO "
( S €
X
s 1 an(
idset c
.e Note
"RESYNC "
" * «
"SYNC
"CRYPTO "
1 Note 2)
)ff hook)
"RESYNC "
" * "
"SYNC
"CRYPTO "
- 2)
Secure data transmission
possible (see Note 3)
In case a secure call is
wanted again, then proceed
as follows:
Calling terminal:
1. Press DTE key.
- EKD or EMG
Note 1: If the terminal at the other end is a STU-II terminal, which
is set only for secure speech, then the data synchronisation
protocols will not be started; the operating mode remains
secure speech.
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 data transmission
indicates pre-emption; finish data transmission immediately
and go on hook.
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