Mustalinja by Moontalk Oy is a free Android app that offers intelligent call management for organizations. Its features include versatile presence mode management, real-time reporting of company calls, and call forwarding between Mustalinja users.

Mustalinja allows you to connect SIM cards of any domestic operator to the mobile switch and manage all of your company's switching calls. The app requires a license to use the black line.

Some of the key features of Mustalinja mobile gear include local and business numbers, recipient groups, user presence modes, call transfers and time controls, setting the number to be displayed externally, the switch's internal, real-time shared log for managing the company's calls, customized announcements, interactive sound menus, recording option, reporting, and automatic identification of the caller.

Overall, Mustalinja is a robust call management solution for organizations that need to manage and forward calls between employees. Its features are easy to use and offer a high degree of customization to fit the needs of any organization.