Learn how this feature allows you to enter additional numbers, from a digital phone, when required during a phone call to reach extensions, choose from numeric menus, activate a pager, use a credit card, leave a voice mail, or conduct any other type of communication that requires touch-tone signals.
Note: The information on this page is generally applicable to digital phone models at UCSD. You may need to check specific information about your phone and the features available to you.
Note: "Touch-tone" is also known as Dual Tone Multi-Frequency (DTMF), the system used by touch-tone phones.