Display DTMF Digits

A feature on the 57i phone allows users to enable or disable DTMF (dual-tone multi- frequency) digits to display to the IP phone when using the keypad to dial, or when dialing from a softkey.

DTMF is the signal sent from the phone to the network that you generate when you press the phone’s touch keys. This is also known as “touchtone” dialing. Each key you press on your phone generates two tones of specific frequencies. One tone 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 softkey display 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 Digits

Aastra Web UI

Use the following procedure to configure the display of DTMF digits on the IP phone.

Note: "Display DTMF Digits" is disabled by default.

1. 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 to save your settings.

Additional Features

Model 57i IP Phone User Guide

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Aastra Telecom IP Phone manual Display Dtmf Digits, Configuring Display of Dtmf Digits, 161