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Aiphone GT-TLI is an interface between the Aiphone GT Series of modular intercoms and a PBX or PSTN telephone network. It is designed to provide automatic telephone dialing (up to 16 digits) when a tenant is called. GT-TLI also enables external telephone number transfer, call-in from door panel via phone, and other important actions. It has a relay for controlling door strikes via GT-TLI. Program the interface locally or remotely.