Earlier quoted context omitted.
It can mean government control over all IXPs in the country (including DPI hardware and a killswitch), and legal mandate for all ISPs in the country to use only government-controlled IXPs. So unless you have a satellite connection or a private microwave link to a friend's antenna on the other side of the border, you don't get internet.
International dial-up is an option too. Although providers are getting fewer. If you've got a landline, a modem and a technically oriented friend outside the shutdown, it doesn't take too much to setup an iffy dialup server. Can't do a lot of surfing with those speeds today though.
Its very simple to analyze calls to see if its voice or a modem. Guess what happens if its the later?