Because more and more people communicate with one another, various frequency bandwidths have become congested. In the future there will be growing need for more efficient utilization of bandwidth. To reduce this congestion the tendency has been to use smaller transmission bandwidths. This is an answer in some of the cases, but in others this is definitely not the way toward maximum spectrum utilization. It is the purpose of this paper to draw attention to places where the wide bandwidth transmissions should be used and then to indicate the type of performance that can be expected from such a system.