---
title: CBL2CAPPSM
framework: corebluetooth
role: symbol
role_heading: Type Alias
path: corebluetooth/cbl2cappsm
---

# CBL2CAPPSM

The type of PSM identifiers.

## Declaration

```swift
typealias CBL2CAPPSM = UInt16
```

## See Also

### Working with L2CAP Channels

- [openL2CAPChannel(_:)](corebluetooth/cbperipheral/openl2capchannel(_:).md)
- [CBL2CAPChannel](corebluetooth/cbl2capchannel.md)