(including the widely used 21.Q1 release) is an essential, specialized Local Craft Terminal (LCT) software suite engineered by Ericsson . It allows telecom engineers and field technicians to configure, manage, and troubleshoot microwave radio nodes locally. Built specifically for the Ericsson MINI-LINK microwave portfolio —such as the MINI-LINK 6600, TN, and CN series—this version delivers critical updates tailored for high-capacity modern telecom infrastructure.

The most frequent use of the term points to the world of . The keyword "craft" and the number "21" immediately bring to mind several popular game genres, though it's often a specific category of game players are looking for.

: Valid for both ETSI and ANSI market standards.