41-001523-00 REV00 – 04.2014 137Additional FeaturesThis section describes additional features you can use on the 6865i phone.Display DTMF DigitsA feature on the IP phones allows users to enable or disable DTMF (dual-tone multi-frequency) digits to display to the IPphone when using the keypad to dial, or when dialing from a programmed key.DTMF is the signal sent from the phone to the network that you generate when you press the phone’s touch keys. This isalso known as touch-tone dialing. Each key you press on your phone generates two tones of specific frequencies. Onetone is generated from a high-frequency group of tones and the other from a low frequency group.If you enable the Display DTMF Digits parameter, the digits you are dialing from the keypad or from a programmable keydisplay to the IP phone’s LCD display. This parameter is disabled by default (no digits display when dialing).You can enable the Display DTMF Digits parameter using the Aastra Web UI.Configuring Display of DTMF DigitsAastra Web UI1. Click on Basic Settings > Preferences > General.2. Enable the Display DTMF Digits field by checking the check box.Disable this field by unchecking the box). Default is disabled.3. Click Save Settings.