How to make the modem connect to the network at a certain time?

Question

Beeline

Hello! How can I make the modem disconnect its connection at a certain time, and then connect to the Internet at a certain time? Beeline 4G modem (ZTE MF823).
A more detailed description of the problem:
It all started with the fact that I have a night tariff on my modem (from 01:00 to 08:00 download for free without traffic loss), well, who knew that it is activated only if at 01:00-08:00 break the connection and then reconnect, that's the crux of the problem. The megaphone did not have this, but I can’t change the tariff yet. Lost 30GB of traffic, such things.

Answer 1

And what kind of system / router where the modem itself is plugged in? It must either reboot the device, or interrupt via usb. Therefore, a description of the extensive can be?

Answer 2

It also describes how to start your modem. Next, you can write a script that will be run by cron and restart the connection: crontab -e 0 0 * * * ifdown wan; ifup wan;