Aiphone GT Series GT-RY External Signaling Relay. The Aiphone GT Series Entry System allows you to provide 24/7 security to your tenants. With the GT series you can keep buildings locked and allow tenants to safely identify visitors. In addition if there is ever an issue at an entrance, tenants can use the system to quickly contact security or the manager's office.
The Aiphone GT-RY is a light control and external signaling relay for the GT system.
