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3x1 w/o PARITY 3x1
w/
PARITY
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4x1 w/o PARITY 4x1
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PARITY
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Parity is a number derived automatically by the dialer utilizing a mathematical formula (modulo 15). Exam-
ple: 123 3 adds up to 9. This number is subtracted from the next highest number that is a multiple of 15; in
this example, that is 15; 15 - 9 = 6. If the CS receiver accepts an even parity digit, it considers the data
transmission valid, delivers a kissoff and processes the data. The parity digit is not displayed. Its only pur-
pose is for validation of data transmitted. It is not a programmable digit; it is generated automatically by the
dialer when the parity option is selected in programming Question 04, Location 2. The obvious advantage
of using parity is speed. The transmission time between dialer and receiver is shorter because fewer digits
are transmitted with it than without it.
Summary of Contents for XL-2T
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