AT&T is currently transitioning from a technical trial of early WiMAX access technology that involved a handful of customers and pre-standard equipment to one involving more than a dozen customers and standards-compliant equipment. The primary goal of the first technical trial was to test the viability of the emerging wireless network as a potential access service by comparing it with T1 technology in terms of reliability and performance. The early trial indicated that WiMAX is on par with T1 technology in terms of the key network performance metrics: latency, jitter, throughput, and packet loss.