程序自动外呼电话，并在电话接通后，给对方播放语音提示，并返回用户的按键信息。 适合做电话催缴费系统，欠费通知系统，语音通知系统。 -Outbound calls automatically, and after the call is connected, to each other play voice prompts, and return the user' s keystrokes. Telephone reminder system suitable payment, arr