Operation Manual

28 Call Functions
Muting the Dial Tone (DTMF Tone)
1. During a call, press A [Options] and press a or b
to highlight “DTMF Tones Off”, then press or
A [Select].
To unmute the dial tone, highlight “DTMF Tones
On” in step 1.
Muting the Microphone
1. During a call, press C [Mute] to mute the
microphone.
To unmute the microphone, press C [Unmute].