Unable to dial the extension number
Ce document concerne les modèles suivants :
1:Phenomenon
The SIP account has been registered successfully, and you can dial the ordinary telephone number. However, you are unable to dial the extension number after calling the center number.
2:Solution
Step 1: Open the web browser and type the LAN IP address of TD-VG3631 or TD-VG3511 in the address bar, the default IP address is 192.168.1.1, and then press Enter.
![](https://static.tp-link.com/resources/UploadFiles/Images/imag2e001.jpg)
Step 2: Type the username and password in the login page, the default username and password both are admin.
![](https://static.tp-link.com/resources/UploadFiles/Images/imag2e003.jpg)
Step 3: Please go to Voice->Advanced Setup page, then you can choose Dtmf Relay Setting as InBand or SIPinfo to try to solve this problem as the following picture shows.
![](https://static.tp-link.com/resources/UploadFiles/Images/imag2e005.png)
If you still can't dial the extension number after changing the Dtmf Relay Setting,
Please feel free to contact with us, you can send an email to support@tp-link.com
Note:There is another thing, my dear customer, you should know. DTMF Relay Setting has three options: SIPInfo, RFC2833, InBand, and the default RFC2833 is applicable in most situations. So if your product is working fine, please don't change the default settings.
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