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OMNI624 Installation and Setup Guide
4x1 w/o PARITY
1234 3 (1st round)
1234 3 (2nd round)
1234 3 (resulting data)
Parity is a number derived automatically by the dialer utilizing a mathematical formula (modulo
15). For example, 123 3 adds up to 9. This is subtracted from the next-highest multiple of 15; in
this case, 15 – 9 = 6. If the CS receiver accepts a valid parity digit, it considers the data
transmission valid, delivers a "Kissoff," and processes the data. The parity digit is not displayed.
Its only purpose 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
Submode 1, Question 10, Location 2/4. The obvious advantage of using parity is speed. The
transmission time between dialer and receiver is shorter because fewer digits are transmitted
with it as opposed to without it.
Extended (3x1 Ext. or 4x1 Ext.)
The Extended Reporting Format: AAA EZ or AAAA EZ, where:
AAAA = Three- or four-digit account number (Submode 1, Questions 06–09)
E = Single-digit event code; it is the first of the 2 programmable reporting code digits
Z = Zone or user identifier; it is the second of the 2 programmable reporting code digits
Extended format is transmitted in Pulse and involves a 3- or 4-digit account number followed by a
double-digit reporting code. The only purpose for using the Extended format (sometimes known as
Universal or Expanded format) is to be able to transmit more than 15 codes to the CS receiver. The
system does this by extending the event code from the previous round of data, resulting in a 2-digit
reporting code. It can be transmitted with parity (2 rounds of data) or without parity (4 rounds of data).
There are 15 possible event codes, each of which can have up to 15 different zone or user identifiers.
Examples:
3x1 Ext. W/O PARITY
123 3 (1st round)
333 1 (3rd round)
123 31 (resulting data)
4x1 Ext. W/O PARITY
1234 3 (1st round)
3333 1 (3rd round)
1234 31 (resulting data) Burglary Zone 1
Partial Extended (3x1 Part. Ext. or 4x1 Part. Ext.)
The Partial Extended Reporting Format: AAA EZ or AAAA EZ
where:
AAAA = Three- or four-digit account number (Submode 1, Questions 06–09)
E = Single-digit event code; it is the first of the 2 programmable reporting code digits
Z = Zone or user identifier; it is the second of the 2 programmable reporting code digits.
8–2
4x1 w/PARITY
1234 3 2 (single round)
1234 3 (resulting data)
123 3 (2nd round)
333 1 (4th round)
Burglary Zone 1
1234 3 (2nd round)
3333 1 (4th round)
3x1 Ext. W/PARITY
123 3 6 (1st round)
333 1 5 (2nd round)
123 31 (resulting data) Burglary Zone 1
4x1 Ext. W/PARITY
1234 3 2 (1st round)
3333 1 2 (2nd round)
1234 31 (resulting data) Burglary Zone 1
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