Open Door
• Program the Open Door feature access code in Form 2.
• (Optional) Program an Open Door feature key on one or more extensions to allow the user to open the door. The key can be programmed to open a specific door by entering the corresponding Door Relay number (1- 4) or the door that the user has answered by entering 0.
Operation
The door opener can be operated by:
• pressing the "Open Door" feature key
• dialing the "Open Door" feature access code.
• pressing the Open Door softkey (available on SUPERSET 4DN, 430, 4025, 4125, and 4150 telephones only)
• pressing the MESSAGE key (not available on SUPERSET 4DN, 430, 4025, 4125 and 4150 telephones).
There is more programming than this but I am not sure you asked that.