# Overview
The POIS must be set up with the following information:
+ A tag for the Elemental Live input. Each input must be unique in the Elemental Live event.
+ The acquisition point ID and zone for the Elemental Live event.
In Elemental Live, you set up the event with the following information:
+ Acquisition point ID. This ID is how the POIS identifies the Elemental Live node. The POIS provides you with this ID.
+ Zone. This ID is how the POIS identifies the specific event. The POIS provides you with this ID.
+ These two fields set up Elemental Live and the POIS to have a common identifier for the event.
In the event, you set up the inputs with the following information:
+ Input ID. This is the standard ID that Elemental Live generates and assigns when you save an event.
+ The URL for the input.
+ Label. This tag has the same value as the label (in Elemental Live). In this way, both Elemental Live and the POIS have a common identifier for each input.
+ A virtual tag. This identifies the input as one that the POIS knows about. Typically, you set up all the inputs in an event as virtual.
## Number of nodes and number of POIS
+ Each Elemental Live node can communicate with only one POIS. All the events on the Elemental Live node must be configured for the same POIS.
+ One POIS can communicate with several Elemental Live nodes. The POIS uses the POIS AcquisitionPointID and ZoneID parameter to uniquely identify each Elemental Live node.
## Number and type of inputs
With asynchronous input switching, the inputs can be any of the following:
+ Programs in one MPTS. You can set up a maximum of 11 programs.
+ Any type of input that Elemental Live considers to be a file input. See [Supported upstream systems for file inputs](supported-inputs-file-types.md).
There is no limit to the number of inputs of this type.
With SCTE-35-triggered input switching, the inputs can be any of the following:
+ Programs in one MPTS. You can set up a maximum of 11 programs.