When a call comes in from the gate, if you answer the phone and press 9, the gate should open. ( I believe this is a temporary open, not a permanent open)
To open the gate and keep it open from any Northern Phone
- Dial 3006
- while the call is active, dial 6575
To close the open gate from any Northern Phone
- Dial 3006
- While the call is active, dial 6576