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  "documentType" : "symbol",
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  "title" : "CTCallCenter"
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# CTCallCenter

An object that provides a list of current cellular calls, and provides the ability to respond to state changes for calls.

```
class CTCallCenter
```

## Topics

### Responding to Cellular Call Events

[`callEventHandler`](/documentation/CoreTelephony/CTCallCenter/callEventHandler)

A closure dispatched when a call changes state.

[`currentCalls`](/documentation/CoreTelephony/CTCallCenter/currentCalls)

An array representing the cellular calls in progress.

## Relationships

### Conforms To

[`CVarArg`](/documentation/Swift/CVarArg)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`Equatable`](/documentation/Swift/Equatable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`Hashable`](/documentation/Swift/Hashable)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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