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Comtech EF Data SMS-758 User Manual

Page 57

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SMS-758 Modem Protection Switch

Operation

MN/SMS758 Rev. 3

3–19

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 500 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

HAS

THE ONLINE

DELAY TIMER
TIMED OUT

YES

NO

Figure 3-4. SMS-758 Switching Algorithm Flow Chart (Modulator)