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Code 11 is a barcode symbology developed by Intermec in 1977. It is primarily used in telecommunications, particularly for labeling telecommunication equipment. Here's a detailed description of the components and structures of the Code 11 barcode:

Components of Code 11 Barcode:

1.Start and Stop Characters:

Code 11 barcodes typically begin and end with a special start/stop character pattern. This pattern helps barcode readers identify the beginning and end of the barcode data.

2.Data Characters:

Code 11 encodes numeric data and a limited set of special characters. It can represent the digits 0-9 and the special characters - (dash) and * (asterisk). Each character is represented by a unique pattern of bars and spaces.

3.Checksum Character:

Code 11 includes a checksum character to ensure data accuracy. The checksum is calculated based on the data characters in the barcode. It helps verify that the barcode has been read correctly.

Structure of Code 11 Barcode:

1.Character Representation:

Each character in a Code 11 barcode is represented by a series of bars and spaces. The barcode is made up of thin and thick bars that encode the data characters and the start/stop characters.

2.Bar and Space Widths:

Code 11 uses two widths for bars and spaces: narrow and wide. These widths are used to encode the data. The specific patterns of narrow and wide bars/spaces represent each character in the barcode.

3.Character Set:

Code 11 encodes a limited set of characters: the digits 0-9 and the special characters - (dash) and * (asterisk). These characters are directly represented in the barcode using the defined bar and space patterns.

4.Start and Stop Patterns:

The start/stop patterns in Code 11 consist of unique combinations of bars and spaces that indicate the beginning and end of the barcode data. These patterns help barcode readers correctly interpret the data.

Example of Code 11 Barcode Structure:

Let's consider an example of a Code 11 barcode representing the number '12345':

Start Character: Typically represented by a specific pattern of bars and spaces indicating the start of the barcode.

Data Characters:

Each digit '1', '2', '3', '4', '5' is encoded using a unique pattern of bars and spaces.

Checksum Character: Calculated based on the data characters to ensure data integrity.

Stop Character: Indicates the end of the barcode data with a specific pattern of bars and spaces.

The actual structure and patterns used in Code 11 depend on the implementation and specifications provided by Intermec. The barcode reader interprets these patterns of bars and spaces to decode the numeric data and verify its accuracy using the checksum.

Conclusion:

Code 11 barcode structure is designed to efficiently encode numeric data with a limited set of special characters. It uses specific patterns of bars and spaces to represent each character, along with start and stop characters for identification and data integrity. This structure ensures that Code 11 barcodes are reliable for telecommunications and other applications requiring numeric data encoding.