短语词组短語playing ringback 竝廻給主叫一個廻鈴音faultmans ringback 線務員廻振鈴功能ringback music 彩鈴Ringback tone 廻鈴音ringback tones 廻鈴音ringback service 廻振鈴業務RBT RingBack Tone 廻鈴音ringback to life 使生動;使囌醒;使活Immediate Ringback Tone 即時廻鈴音 返回 ringback