We use a Epic bit of software called 'LOTATC'

What is LotAtc 4 DCS?

LotAtc 4 DCS is a client + server software witch is connected with DCS World Simulator and provide users to get an ATC/GCI view of the battle. You can help human pilots to accomplish their mission by radioing them a tactical view!

LotAtc originally stands for “Lock-On tiny ATC” (back in 2006!) and later “Lock-On tactical Air Traffic Control” to emphasize the importance of the tactical part. The original name was retained for the current LotAtc 4 DCS version as it is well known by the online community.