I'm not sure where to post this one-is this a Partner issue or just an Single Line? Customer is moving into a multi-office building where everyone has access to a building door opening box. Someone comes to the door, dials a code like *8 for access to the office they want. The phone rings in the officeon all phones and any user can buzz them in by pressing 9 on their phone.

Customer has a Partner system rel 6.1, but I don't know if this requires the Partner' door contact closure programming or not. Customer says it is connected to line 1 which rings on all phones, and anyone can answer and press 9 for entry.

So, should I connect the first line directly to the building system, or use a speed dial button, or connect to the Partner system and program it (F41)for contact closure?

Thanks for your help in advance.