The 4x4 multiswitch, or any multiswitch, is used to split the service provided by your satellite company so that other areas of your home can have a receiver. For example, if you have two televisions and want satellite reception on each, you require two receivers, one for each television. A 4x4 multiswitch device will provide you with this capability.
A common way you can add more satellites in a certain area, say in an apartment complex, or in a large home, is to use a 4x4 multiswitch. This method allows the connection of both satellites to operate under one account.
Satellite companies use the 4x4 multiswitch design to enhance your viewing needs. Some well-known satellite companies that use a multiswitch include DirecTV and Dish Network.