King Computer Solutions

DTMF tones not working on sip trunk

We normally use ivox as our voip provider where it automatically relays dtmf tones over the trunk. We now use a variety of providers where they all don’t automatically support dtmf. To get it working you need to add the following to your outbound trunk settings.



Basically this adds the dtmf tones to the voice section of a call as if you are talking the tones so the remote end can hear the tone to progress through the menus.