The Australian Postal Service uses a variant of the 4 State code with Reed-Solomon Error Correction.
Australia Post barcodes are made up of a two digit Format Control Field (FCC), an 8 digit Delivery Point Identifier (DPID), and (for Customer 2 & 3 formats) a variable length Customer Information Field.
For convenience some of the formats may be created automatically:
Standard Customer code (FCC=11): by unchecking both the EXTRA1 and IEXTRA2 checkboxes in applications, or clearing the flags parameter bits DL_FLAG_EXTRA1 (bit 4 of the flags variable) and DL_FLAG_EXTRA2 (bit 5 of the flags variable).
Customer 2 (FCC=59): by checking the EXTRA1 checkbox in applications, or setting the flags parameter bit DL_FLAG_EXTRA1 (bit 4 of the flags variable).
Customer 3 (FCC=62): by checking the EXTRA2 checkbox in applications, or setting the flags parameter bit DL_FLAG_EXTRA2 (bit 5 of the flags variable).
If both EXTRA1 and EXTRA2 flags are checked (or both flags parameter bits DL_FLAG_EXTRA1 (bit 4 of the flags variable) and DL_FLAG_EXTRA2 (bit 5 of the flags variable) are set, then the barcode type is determined by the first two digits of the data according to the following table:
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If the 8 digit DPIP is 00000000 then the FCC field is set to 00. This FCC is used on mail where customers DO NOT include the DPID of a customer, but do want to take advantage of imbedding their own data in the barcode.
Australia Post
The barcode will typically be printed with a height of 5 mm, and an overall length reflecting the number of bars at approximately 22 - 25 bars per inch
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