Motorola MSF 5000 Instruction Manual page 84

Chapter
1
Description
MSF
5000
Instruction Manual
Secure Board Functional Description
Table 1-9
Hybrids
Field
Mod
Use
Quantity Description
Option
Kit
No.
C331 Secure
Encryption
Full duplex
Half-duplex
C388
TRN9843 DES Encryption Full duplex
Half-duplex
C794
DVP
Encryption
TRN6777
Full
duplex
Half-duplex
C795
DES-XL
Encryption
TRN7036
Full
duplex
Half-duplex
C797
DVP-XL™ Encryption TRN7038
Full
duplex
Half-duplex
1
2
2
2
1
2
1
2
Alert Tones
Six types of codeplug selectable (field programmable) alert tone sequences can
be
generated
by
the Secure board to
signal various conditions in an encrypt/decrypt
station.
Normally,
all six types are enabled at the
factory.
All
tones
have
a
frequency of
750 Hz,
but are of
varying
duration. These tones
are
gated to the
wireline and local speaker, but not over the air. The six types of alert tones
are:
1-46
CLEAR XMIT
-
If
enabled,
a
single
87
ms beep is encoded at the start of any
clear line or local PTT. This
serves as
a
warning
to the operator that
transmission is not
secure.
CLEAR RECEIVE
-
If
enabled, a
single
87
ms beep is encoded at the start of
any clear receive activity. This
serves
to
notify
the console operator that
transmission is in the clear mode.
CROSS-MODE
If
enabled,
a
single
87 ms beep is encoded at the
start of any
clear receive
activity
ONLY if
the
wireline mode is coded.
KEY
RESET
ALERT
If
enabled, the 750
Hz
tone is encoded as
long
as the
key
erase
signal is active.
XMIT
KEY
FAIL
-
If
enabled, the 750
Hz
tone is encoded
with
an 87 ms on
and
an 87
ms off
duty
cycle,
if
©
a
coded
Line/Local PTT
occurs and the
selected
hybrid
has
a
corrupted
/ erased key.
This tone sequence is
only
generated
while
the
PTT
is active, and the
key
is lost.
a
NOTE
A
secure
hybrid
indicates
a
corrupted
key by pulling
its
KEY
line low whenever
the
PTT
and transmit
(encrypt)
states are
active.
The
secure
ASIC
monitors
the
KEY
lines
to
check for corrupted
and/or erased
keys among
the
hybrids. The C794
DVP
secure
hybrid
option does not provide this key fail indication.
68P81092E02
3/14/94
Chapter
1
Description
MSF
5000
Instruction Manual
Secure Board Functional Description
Table 1-9
Hybrids
Field
Mod
Use
Quantity Description
Option
Kit
No.
C331 Secure
Encryption
Full duplex
Half-duplex
C388
TRN9843 DES Encryption Full duplex
Half-duplex
C794
DVP
Encryption
TRN6777
Full
duplex
Half-duplex
C795
DES-XL
Encryption
TRN7036
Full
duplex
Half-duplex
C797
DVP-XL™ Encryption TRN7038
Full
duplex
Half-duplex
1
2
2
2
1
2
1
2
Alert Tones
Six types of codeplug selectable (field programmable) alert tone sequences can
be
generated
by
the Secure board to
signal various conditions in an encrypt/decrypt
station.
Normally,
all six types are enabled at the
factory.
All
tones
have
a
frequency of
750 Hz,
but are of
varying
duration. These tones
are
gated to the
wireline and local speaker, but not over the air. The six types of alert tones
are:
1-46
CLEAR XMIT
-
If
enabled,
a
single
87
ms beep is encoded at the start of any
clear line or local PTT. This
serves as
a
warning
to the operator that
transmission is not
secure.
CLEAR RECEIVE
-
If
enabled, a
single
87
ms beep is encoded at the start of
any clear receive activity. This
serves
to
notify
the console operator that
transmission is in the clear mode.
CROSS-MODE
If
enabled,
a
single
87 ms beep is encoded at the
start of any
clear receive
activity
ONLY if
the
wireline mode is coded.
KEY
RESET
ALERT
If
enabled, the 750
Hz
tone is encoded as
long
as the
key
erase
signal is active.
XMIT
KEY
FAIL
-
If
enabled, the 750
Hz
tone is encoded
with
an 87 ms on
and
an 87
ms off
duty
cycle,
if
©
a
coded
Line/Local PTT
occurs and the
selected
hybrid
has
a
corrupted
/ erased key.
This tone sequence is
only
generated
while
the
PTT
is active, and the
key
is lost.
a
NOTE
A
secure
hybrid
indicates
a
corrupted
key by pulling
its
KEY
line low whenever
the
PTT
and transmit
(encrypt)
states are
active.
The
secure
ASIC
monitors
the
KEY
lines
to
check for corrupted
and/or erased
keys among
the
hybrids. The C794
DVP
secure
hybrid
option does not provide this key fail indication.
68P81092E02
3/14/94