Model 6757i CT IP Phone User Guide 243Additional FeaturesDisplay DTMF DigitsA feature on the 6757i CT phone allows users to enable or disable DTMF (dual-tonemulti-frequency) digits to display to the IP phone when using the keypad to dial, or when dialingfrom a softkey or expansion module key.DTMF is the signal sent from the phone to the network that you generate when you press thephone’s touch keys. This is also known as “touchtone” dialing. Each key you press on your phonegenerates two tones of specific frequencies. One tone is generated from a high-frequency group oftones and the other from a low frequency group.If you enable the Display DTMF Digits parameter, the digits you are dialing from the keypad orfrom a softkey, display to the IP phone’s LCD display. This parameter is disabled by default (nodigits display when dialing).You can enable the "Display DTMF Digits" parameter using the Aastra Web UI.Configuring Display of DTMF DigitsUse the following procedure to configure the display of DTMF digits on the IP phone.1. Click on Basic Settings->Preferences->General.Aastra Web UINote: "Display DTMF Digits" is disabled by default.
