Comtech EF Data SMS-458B - Manual (Page 56)

SMS-458B Modem Protection Switch Revision 2
Operation MN/SMS458B.IOM
3–20
HAS THE
VERIFY TIMER
TIMED OUT?
VERIFY THE
CONFIGURATION
OF THE NEXT MOD.
(SERIAL REMOTE
NOT AVAILABLE)
YES
ARE ANY
PRIMES
FLT’D?
ARE THE
B/U (s) ON
STAND-BY?
ARE THE
FLT’D
PRIMES
B/U’D?
PUT FLT’D
PRIMES IN PRIORITY
ORDER. START WITH
HIGHEST PRIORITY.
IS THIS
FLT’D
PRIME B/U’D?
IS A
B/U
AVAILABLE?
IS
THE B/U
ON STAND-BY
FOR THIS
PRIME?
VERIFY B/U
CONFIGURATION.
UPDATE IF
NECESSARY.
(SERIAL REMOTE
NOT AVAILABLE)
IS THE
B/U MOD
FLT’D?
HAS
THE 100 ms
TIMER TIMED
OUT?
ARE
OTHER
PRIMES
FLT’D?
PROGRAM B/U (s)
FOR HIGHEST
PRIORITY CHANNEL(s).
(SERIAL REMOTE NOT
AVAILABLE) PLACE B/U (s) IN
STAND-BY MODE.
INDICATE WITH “-” ON
FRONT PANEL
IS A
LOWER
PRIOIRTY PRIME
B/U’D?
IS A
NON-FLT’D
PRIME B/U’D?
PROGRAM B/U
WITH THE
CONFIGURATION
FOR THIS PRIME.
(SERIAL REMOTE
NOT AVAILABLE)
WAIT FOR ALL
APPLICABLE TIMERS.
INDICATE PRIME
WITH “#” ON
FRONT PANEL
IS THE
PRIME STILL
FLT’D?
PLACE B/U ON-LINE
FOR FLT’D PRIME
WITH “->“ ON
FRONT PANEL.
GO TO NEXT
FLT’D PRIME IN THE
PRIORITY ORDER.
MOD AUTO MODE
NO
NO YES
NO YES
YES
NO
NO NO NO
YES
YES
YES
NO
YES
NO
NO
YES
YES
YES
YES
NO
YES
NO
NO
Figure 3-3. SMS-458B Switching Algorithm Flow Chart Demodulator
MOD