Very-small-aperture terminal

A very-small-aperture terminal (VSAT) is like a big phone that uses satellite signals to talk to other big phones far away.

When we use a regular phone, the signal travels through wires or mobile towers, but sometimes these wires and towers may not reach far away places, especially in remote areas like on a mountain, in a jungle or on an island. This is where a VSAT comes in handy.

A VSAT can communicate with other VSATs or with a big hub station that is connected to the internet. It does this by sending signals to a satellite that is high up in the sky. The satellite then sends the signal back down to the other VSAT or hub station.

But how does the VSAT send signals to the satellite and receive signals back? This is where the "very small aperture" comes in. The VSAT has a dish that is like a big bowl-shaped antenna. This dish collects the signals bouncing off the satellite and sends them to a modem that turns them into something that can be used by a computer or phone.

In simple words, a VSAT is like a special phone that uses a satellite to call people far away. The VSAT does this using a dish that is like a big ear to hear the signal and a modem that translates the signal to something we can understand. So, even if we are in a remote place far away from other phones, we can still make calls or access the internet with VSATs.