The Avaya Door Opening Controller provides Avaya/Nortel Doorphone with ability to unlock electric doors simply by pressing an OPEN softkey display button or a dial pad digit on their Norstar/Nortel set. DOC enables electronic devices (e.g. alarm systems, surveillance cameras, lights, etc.) to be controlled through contact closure. Compatible with 3x8 DR5, Compact DR2, DR5, DR5-DS, Modular DR2-DR5, Norstar CICS, MICS, and Nortel BCM equipped with Norstar/BCM BST Doorphone.