使用Sinch Rest Api拨打电话的应用程序

Question

我正在使用sinch rest api进行电话呼叫正常工作，我的问题是如何更改音频（wav）文件，文本中提到了默认文件：http://www.thehotline.co/content/prompts/v2/1greeting_b.wav 但如果我将音频文件更改为http://www.wav-sounds.com/cartoon/bugsbunny1.wav音频文件没有播放，则会读取文件路径......

[POST] https://callingapi.sinch.com/v1/callouts
   {
  "method" : "ttsCallout",
   "ttsCallout" :
   {
   "cli" : "46000000000",
   "destination" : { "type" : "number", "endpoint" : "46000000001" },
   "domain" : "pstn",
   "custom" : "customData",
    "locale" : "en-US",
    "text" : "http://www.thehotline.co/content/prompts/v2/1greeting_b.wavss"
   }
 }

...谢谢