Amazon 使用哪种服务来激活 EC2？
注册 Amazon EC2 时，我必须使用手机激活该服务。我点击了一个“立即给我打电话”的按钮，然后亚马逊在我的屏幕上显示了一个 PIN 码，然后我必须在接到他们的电话后输入我的手机。通话完成后，我的屏幕会自动更新并表示我已获得批准。
哪种服务允许亚马逊执行此操作？我知道它们是 Twilio 和其他服务，但我想知道是否有人知道他们使用哪种服务/API。
When signing up for Amazon EC2 I had to activate the service using my phone. I clicked a button that said "Call me now", then amazon displayed a PIN on my screen which I then had to key in my phone once I received a phone call from them. Once the call was completed my screen automatically updated and said I was approved.
Which service allows Amazon to do this? I know they're Twilio and other services but I'm wondering if anyone knows which service/API they use.
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您可以通过 Twillio 实现这一目标。我最近刚刚玩了他们的 API（通过他们提供的 PHP 库），他们制作了这些事情琐碎。
所以在这种情况下，听起来你想要收集：
http://www.twilio.com/docs/api/twiml/gather
在他们的标记之上，您可以不断轮询呼叫状态等，以便您可以实时更新自己的应用程序，例如反映呼叫已完成或输入是否正确或不正确。
You could achieve that with Twillio. I just recently played with their API (through the PHP library they provide) and they make these kinds of things trivial.
So in this case, it sounds like you want Gather:
http://www.twilio.com/docs/api/twiml/gather
On top of the their markup, you can constantly poll for the status of a call, etc. so you can update your own application in real time, e.g. to reflect that the call finished or if the input was correct or incorrect.