Mutes the EarlyMedia function.

During the call phase, audio, e.g. the call tone, signal tone, an announcement or voice, can be transferred (EarlyMedia). This includes transferred ringing tone sounds or announcement texts such as "This number is not in use."

Whether EarlyMedia is supported depends on the provider. It is possible that the provider allows the negotiation but suppresses the audio transmission.

Call waiting signals incoming calls during a call.

A call is signalled by

If the option is disabled, the person making the call hears the busy signal.

Ringtone can be heard through the PC loudspeaker as well as the headset.

This is useful for hearing the ringtone for an incoming call if a headset is normally used but is currently not being worn.

The softphone outputs no sounds when the keypad is used.

This has no effect on the DTMF sounds that are sent to the server. Instead, it only prevents the local playback of the same sounds on the softphone.