The L7583A/B/C/D Line Card Access Switch is a monolithic solid-state device providing the equivalent switching functionality of three 2 form C switches. The L7583 is designed to provide power ringing access, line test access (test out), and SLIC test access (test in) to tip and ring in central office, digital loop carrier, private branch exchange, digitally added main line, and hybrid fiber coax/fiber-in-the-loop analog line card applications. An additional pair of solidstate contacts are also available to provide access for testing of the ringing generator.