The MB86961A Universal Interface for 10BASE-T (Twisted-Pair) Ethernet is fully compliant with the IEEE 802.3 specifications for AUI (Attachment Unit Interface) and 10BASE-T (Twisted-Pair) interfaces and provides the electrical interface between an Ethernet controller and the DB15 (AUI) and RJ45 (10BASE-T) connections to an Ethernet local area network. Functions provided by the MB86961A include Manchester encoding and decoding of the serial data stream, level conversion, collision detection, signal quality error (SQE) and link integrity testing, jabber control, loopback, and automatic correction of