ISO 11785 defines the technical features and the communication protocols of the transponder and the readers in order to guarantee compatibility.

The application frequency for animal identification is 134,2 kHz.

The communication between the transponders and the readers can be supported by two transmission protocols: Full-Duplex (FDX-B); Half-Duplex (HDX).

When the transmission of the information is completed the transponder returns to its passive mode until it is switched on again by the reader.

ISO 11784

ISO 3166

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