VATLines is an application that facilitates ground-to-ground communication between air traffic controllers on the VATSIM network. VATLines uses modern technologies to deliver an easy-to-use, lightweight, and configurable platform for inter- and intra-facility communication. VATLines currently supports both VSCS and RDVS based consoles, as well as the three major landline communication types.

VATLines currently supports Shout lines, and Override calls. Support for Ring calls is planned in the future. VATLines allows the routing of landline audio to two audio devices, allowing for the simulation of headset and loudspeaker. However, due to limitations with AudioForVATSIM, air-to-ground routing is not available, and landline calls that would be able to hear those communications will not be able to do so.

VATLines allows facility engineers to have complete control over Direct Access button definitions and assignments. Facilities can define an unlimited number of button configurations per position, to support event staffing and unique splits.

The VSCS panel used in en-route environments supports up to 54 DA buttons per configuration, while the RDVS panel supports up to 540 DA buttons per configuration.

VATLines desktop app supports global hotkeys, allowing you to use Push-to-Talk even if the app is not the focused window. VATLines supports just about every key combination out there.