---
title: "StandardUSB20::convertBESLNsToIndex"
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 12.0+]
path: kernel/3793956-standardusb20
---

# StandardUSB20::convertBESLNsToIndex

## Declaration

```occ
IOReturn StandardUSB20::convertBESLNsToIndex(uint32_t beslNs, uint32_t & beslIndex);
```