# Radio Links

# Radio Links

This module includes configuration variables for radio links.

## Summary

| ### Macros ||
|---|---|
| `https://openthread.io/reference/config/group/config-radio-link#group__config-radio-link_1gafb033d8eace847310f8a2680479b035f 0` |   |
| `https://openthread.io/reference/config/group/config-radio-link#group__config-radio-link_1ga407fd450fd4e11c4cc734dec97f24617 (20 * 1000)` | Specifies the fragment tag timeout interval in milliseconds. |
| `https://openthread.io/reference/config/group/config-radio-link#group__config-radio-link_1gaa98787cd17d825b7f6d22705baa0a793 1` | Set to 1 to enable support for IEEE802.15.4 radio link. |
| `https://openthread.io/reference/config/group/config-radio-link#group__config-radio-link_1ga61bc3e0ae638b97378fd4222c9d3a7dc 0` | Set to 1 to enable support for Thread Radio Encapsulation Link (TREL). |
| `https://openthread.io/reference/config/group/config-radio-link#group__config-radio-link_1ga4d5c567a7a8a5d098a0c0f0d2805f4fa 0` | Set to 1 to enable support for Radio Statistics. |

## Macros

### OPENTHREAD_CONFIG_MULTI_RADIO

```
 OPENTHREAD_CONFIG_MULTI_RADIO 0
```

### OPENTHREAD_CONFIG_MULTI_RADIO_FRAG_TAG_TIMEOUT

```
 OPENTHREAD_CONFIG_MULTI_RADIO_FRAG_TAG_TIMEOUT (20 * 1000)
```
Specifies the fragment tag timeout interval in milliseconds.

### OPENTHREAD_CONFIG_RADIO_LINK_IEEE_802_15_4_ENABLE

```
 OPENTHREAD_CONFIG_RADIO_LINK_IEEE_802_15_4_ENABLE 1
```
Set to 1 to enable support for IEEE802.15.4 radio link.

### OPENTHREAD_CONFIG_RADIO_LINK_TREL_ENABLE

```
 OPENTHREAD_CONFIG_RADIO_LINK_TREL_ENABLE 0
```
Set to 1 to enable support for Thread Radio Encapsulation Link (TREL).

### OPENTHREAD_CONFIG_RADIO_STATS_ENABLE

```
 OPENTHREAD_CONFIG_RADIO_STATS_ENABLE 0
```
Set to 1 to enable support for Radio Statistics.

Note that this option only works for OPENTHREAD_FTD and OPENTHREAD_MTD.

## Resources

OpenThread API Reference topics originate from the source code, available
on [GitHub](https://github.com/openthread/openthread/tree/main/include/openthread).
For more information, or to contribute to our documentation, refer to
[Resources](https://openthread.io/resources).