> For the complete documentation index, see [llms.txt](https://teamhelp.sipgate.co.uk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://teamhelp.sipgate.co.uk/use-sipgate/troubleshooting-problem-solving/why-are-touchtones-ivr-key-presses-not-recognised.md).

# Why are Touchtones (IVR Key Presses) not recognised?

How to configure DTMF touchtone settings on various VoIP phones to ensure IVR key presses are recognised with sipgate.

With some phones and devices a small change to your settings is needed to activate touchtone dialling. To test your VoIP phone's [configuration](https://teamhelp.sipgate.co.uk/hc/en-gb/articles/204217331) dial **10020.**\
If your device is listed in our Setup Guides Menu, please first check your settings against the setup guide. Your VoIP phone must support DTMF tones via **RFC2833**.

#### Aastra

In your Aastra phones web settings under **Advanced** ➔ **sipgate Line ­­** ➔ **RTP Settings** please check that the 'DTMF Method' is set to 'RTP'.

#### Asterisk

In your sip.conf for the peer sipgate line please change **dtmfmode** from **Info** to **rfc2833**.

#### Draytek Vigor

In the configuration interface of your router please open **VoIP ­** ➔ **Phone Settings** ➔ **select the sigpate Index**.\
Next click **Advanced** and set DTMF Mode to **Outband (RFC2833)** and the Payload type to 101.

#### Grandstream

Please set **Send DTMF** to via RTP (RFC2833) and **DTMF Payload Type** to 101\
For Grandstream GXP deskphones, the DTMF option will be found in the **Account** settings.

#### Siemens Gigaset devices

For most Gigasets, in the Web Configurator menu under **Telephony** ➔ **Advanced Settings** ➔ **DTMF over VoIP Connections** please set the option Send Settings to RFC 2833.

#### Snom

In your Snom's Web User Interface under **Setup** select your sipgate Identity and then click the SIP tab. The option **DTMF via SIP INFO** should be set to Off.

#### Yealink

In the Advanced settings of your Yealink's sipgate Account please set the **DTMF Type** to RFC2833 and the **Payload Type** to 101.

#### Cisco SPA

In your Cisco SPA device's Line or EXT settings check that **DTMF Tx Method** is set to Auto and **DTMF Tx Volume for AVT Packet** is set to: 99999999