For Barcodejets with Part Number 11B525-00, there is a known issue with firmware versions before 2.61 that can prevent linkage on printers with MAC addresses with values other than 00 in the first byte. Usually this is typically noticed when the Barcodejet is moved to a new printer. In order to address the issue, first connect the Barcodejet to the original printer (or a printer that has a MAC address that begins with 00). Then update the Barcodejet to the current firmware, following the procedure indicated in this link.
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