Although Carterfone expected AT&T to permit connection of equipment, AT&T successfully argued that they should be permitted to require the use of a Unique product to safeguard their network, placed in between the 3rd-party modem and the line, called a Data Access Arrangement or DAA. 이를 위반 시 『정보통신망 이용 https://samsung93715.wikidirective.com/7100445/how_tv_can_save_you_time_stress_and_money