Leaving the call hanging can lead to billing issues because the application is unable to process incoming call hang-ups when it is stuck waiting for a response message.
保持调用挂起可能会导致收费问题，因为当应用程序受阻塞、等待响应消息时，不能处理入站调用挂起。
Leaving the call hanging can lead to billing issues because the application is unable to process incoming call hang-ups when it is stuck waiting for a response message.
保持调用挂起可能会导致收费问题，因为当应用程序受阻塞、等待响应消息时，不能处理入站调用挂起。
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