---
title: CXErrorCodeNotificationServiceExtensionError.Code
framework: callkit
role: symbol
role_heading: Enumeration
path: callkit/cxerrorcodenotificationserviceextensionerror-swift.struct/code
---

# CXErrorCodeNotificationServiceExtensionError.Code

Constants for errors returned when reporting new, incoming VoIP calls.

## Declaration

```swift
enum Code
```

## Topics

### Error Codes

- [CXErrorCodeNotificationServiceExtensionError.Code.invalidClientProcess](callkit/cxerrorcodenotificationserviceextensionerror-swift.struct/code/invalidclientprocess.md)
- [CXErrorCodeNotificationServiceExtensionError.Code.missingNotificationFilteringEntitlement](callkit/cxerrorcodenotificationserviceextensionerror-swift.struct/code/missingnotificationfilteringentitlement.md)
- [CXErrorCodeNotificationServiceExtensionError.Code.unknown](callkit/cxerrorcodenotificationserviceextensionerror-swift.struct/code/unknown.md)

### Initializers

- [init(rawValue:)](callkit/cxerrorcodenotificationserviceextensionerror-swift.struct/code/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)