Go to Phone->Voice, to configure volume and upload tone file.
Mic Volume:To configure Microphone volume.
Speaker Volume:To configure Speaker volume.
Ringback Volume:To configure Speaker volume.
Open Door Warning: Disable it, you will not hear the prompt
voice when the door is opened.
IP Announcement:To setup the IP Announcement active time.
Over the configured value, the phone will not announce its IP
address, even you hold the button.
RingBack Upload: To upload the ring back tone by yourself.
Opendoor Tone Upload:To upload the Opendoor tone by
yourself.