---
title: PTChannelTransmitRequestSource.unknown
framework: pushtotalk
role: symbol
role_heading: Case
path: pushtotalk/ptchanneltransmitrequestsource/unknown
---

# PTChannelTransmitRequestSource.unknown

A transmission request that indicates an unknown reason.

## Declaration

```swift
case unknown
```

## See Also

### Transmission sources

- [PTChannelTransmitRequestSource.userRequest](pushtotalk/ptchanneltransmitrequestsource/userrequest.md)
- [PTChannelTransmitRequestSource.developerRequest](pushtotalk/ptchanneltransmitrequestsource/developerrequest.md)
- [PTChannelTransmitRequestSource.handsfreeButton](pushtotalk/ptchanneltransmitrequestsource/handsfreebutton.md)