This blog article outlines how to send dtmf signals directly from the TelephoneIntegration (TI) balloon, so you no longer need to do that with your telephone handset. This feature is available in version 5.56 or higher.

Examples of using dtmf functionality:

• authentication by conference calls
• interacting with IVR systems

That means, when you call e.g. a support telephone number, or you would like to start a conference call, you may have to enter an access password or some digital numbers. With the dtmf function, you don't need to use your telephone handset to enter your access password, but to select it direclty via the dtmf function in TelephoneIntegration.