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# init(networkIdentifier:)

Initializes a Downlink Time-Difference-of-Arrival (DL-TDOA) configuration for a specific tracked area.

```
init(networkIdentifier: Int)
```

## Parameters

`networkIdentifier`

An identifier for the DL-TDOA network that the session belongs to. Anchors that share the same network ID are part of one ranging network that can span multiple anchor clusters.

## Discussion

When you call this method, the [`discoveryMethod`](/documentation/NearbyInteraction/NIDLTDOAConfiguration/discoveryMethod-swift.property) defaults to [`NIDLTDOAConfiguration.DiscoveryMethod.bluetoothLowEnergy`](/documentation/NearbyInteraction/NIDLTDOAConfiguration/DiscoveryMethod-swift.enum/bluetoothLowEnergy). To initialize a configuration and specify your deployment’s discovery method, call [`init(networkIdentifier:discoveryMethod:)`](/documentation/NearbyInteraction/NIDLTDOAConfiguration/init(networkIdentifier:discoveryMethod:)) instead.

---

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