1.0 Introduction
The Doors.NET Gateway is a service that provides the communication between the software and the hardware (the controllers, readers, I/O modules, etc).

Each hardware types has its own gateway type (there is a PXL gateway, NXT gateway, Neutron gateway and an MSC gateway) the MSC gateway is used to communicate to NXT Mercury-Inside and Real Mercury (SCP) controllers.
2.0 Gateway Limitations
- A new Doors.NET system comes with a single gateway. Additional gateway connections can be purchased and enabled on you license.
- You can have multiple gateways installed on the host PC but they must be OF DIFFERENT TYPES.
- Multiple gateways of the same controller type must be running on separate PCs (for example: you might have the Application Server, Database and PXL gateway on the host PC and then a second PXL gateway running on a second, remote PC.
- Neutron Gateways cannot co-exist with other controller gateway types. When the Neutron gateway is enabled and installed ONLY Neutron controller types can be used on that system.