Abstract: Capacity of cellular telephone network is increased by using database to record number of callers using low data rate equipment, such as noise reducing or canceling equipment. Use of noise reduction telephones leads to increase in SNR which allows greater number of users. As number of low data rate communications devices, such as noise reduction cellular telephones increases on network and replace higher data rate devices, capacity of network increases as compared to a network that has greater number of higher data rate devices, and number of allowed calls on network may be increased. Business method for operating network, such as a cellular telephone network, that increase revenues and profitability of network as result of increasing network capacity without increasing network infrastructure. Database alone and in combination with cellular device and network used to identify and track number of cellular telephone users who are using low data rate equipment.