With millions of small- to medium-sized enterprises existing today,the requirement for carriers to provide cost-effective integrated voice and data solutions is growing at a ® delivers with the rapid rate.ADTRAN ® industry-leading Total Access Integrated Access Devices (IADs). The Total Access 600R, 604, 608, 612, 616, and 624 are cost-effective, fixed-port, IADs designed to support IP, TDM, or ATM networks. These IADs offer CLECs, ILECs, RBOCs, and ISPs a means to offer combined voice and data traffic over a single network interface terminating at the customer’s premises.