What is TLC39?

A composite symbology that links a Code 39 primary symbol to a MicroPDF417 secondary component. The linkage flag tells a decoder that the two components form one message.

How it is structured

A Code 39 linear component carries the primary identifier; a linked MicroPDF417 component below it carries supplementary data.

Where it is used

Telecommunications equipment and labels following Telecommunications Industry Forum identification conventions.