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

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