> For the complete documentation index, see [llms.txt](https://www.multi-module.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.multi-module.org/using-the-module/protocol-details/sfhss.md).

# Futaba / SFHSS

## Details

**Protocol Number:**  21\
**Autobind:**  No\
**Channel Re-mapping:**  Yes\
**Extended Limits:**  Yes\
**Failsafe Support:**  Yes\
**Receiver Match:**  No\
**Telemetry:**  No\
**Option Value:**  Frequency fine tuning

{% hint style="danger" %}
Frequency tuning is required for this protocol.  See the [Frequency Tuning page](/using-the-module/frequency-tuning.md) for more details.
{% endhint %}

## Notes

**Models:**  Futaba receivers and various XK models.

## Channel Assignment

| CH1 | CH2 | CH3 | CH4 | CH5 | CH6 | CH7 | CH8 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| A   | E   | T   | R   | CH5 | CH6 | CH7 | CH8 |

{% hint style="info" %}
The Channel Assignment table assumes the MULTI-Module's default Expected Channel Order, **AETR**, is being used on the radio.

If you have changed the MULTI-Module's Expected Channel Order to something other than AETR you need to adjust CH1 to CH4 accordingly. See the[ Channel Order page](/using-the-module/channel-order.md) for more details.
{% endhint %}