Volume and tone configuration includes tamper alarm and prompt volume settings. Moreover, you can upload the door-opening ringtones.
Volume Configuration
To set it up, go to Device > Audio interface.

Tamper Alarm Volume: Set the volume when the tamper alarm is triggered. The default volume is 8.
Prompt Volume: Set the voice prompt volume. The default volume is 8.
Upload Open Door Tone
Vous pouvez télécharger le signal de défaillance de la porte ouverte et du succès sur l’interface web de l’appareil.
To set it up, go to Device > Audio interface. Click Import to upload the file and click Reset to remove the file.

Note
File Format: wav, size: < 200KB, sample rate: 16000, Bits: 16.
Ringback Tone Setting
Le réglage de la sonnerie de retour privilégie la lecture des sonneries locales et détermine quels types d’aperçus le téléphone peut recevoir.
Set it up on the Device > Audio > Ringback Tone Setting interface.

Ringback Source:
Remote, Local As Backup: The local ringtone will be played.
When the door phone calls another device, for example, an Akuvox indoor monitor, and the SIP server returns non-183, the indoor monitor will not have any intercom preview.
If the SIP server returns 183, the indoor monitor will receive the video preview without voice.
Local: The local ringtone will be played. Whether the SIP server returns 183 or not, the callee will not have any intercom preview.
Remote:
If the SIP server returns non-183, the local ringtone will be played and the callee will not have any intercom preview.
If the SIP server returns 183, the SIP server’s ringtone will be played and the callee will receive the video preview without voice.