The GT-TLI-IP is a mobile app network adaptor for the GT Series. When running the AiphoneGT App, calls can be answered directly from a smartphone. Once the visitor is approved, the door can be unlocked from the same mobile device. The GT-TLI-IP adaptor will connect up to 3 AiphoneGT Apps, providing more flexibility for family/colleagues who need to screen visitors. The GT-TLI-IP can be included in the tenant's apartment/suite with other GT Series tenant stations, such as the GT-1C7, GT-2C, GT-1M3, or GT-1A. If preferred, the app can be used without an interior tenant station, making it the one option for tenants to answer visitors and unlock the door.