jitsi_app_c0/react/features/invite/sounds.js

/**
 * The name of the sound file which will be played when the status of an
 * outgoing call is ringing.
 */
export const OUTGOING_CALL_RINGING_FILE = 'outgoingRinging.wav';

/**
 * The name of the sound file which will be played when outgoing call is
 * started.
 */
export const OUTGOING_CALL_START_FILE = 'outgoingStart.wav';