Tech support: Can you tell if it’s an Ethernet cable or a phone cable?
Customer: How do I tell?
Tech support: Well, if you hold it up to the cable attached to your phone and you look at the plug, if it looks the same, you’ve got a phone cable. If it’s bigger, it’s probably Ethernet.
Customer: Oh cool. Let me look.
Tech support: WAIT! [dial tone]
711 Boylston Street