(When using ADSL to surf the Internet, you will often encounter the phenomenon that the page cannot be opened, the download is interrupted, the online video and audio streaming may be interrupted, the qq connection is dropped, and the game connection is dropped. We may as well assume that the landlord is using ADSL to access the Internet. The factors that often drop the Internet by other methods are roughly the same as the following factors. Let's analyze the elements of ADSL dropped calls.)