The Integrated Multiport Repeater Plus (IMR+) chip is a VLSI circuit that provides a system-level solution to designing a compliant 802.3 repeater incorporating 10BASE-T transceivers. The device integrates the Repeater functions specified by Section 9 of the IEEE 802.3 standard and Twisted-Pair Transceiver functions complying with the 10BASE-T standard. The Am79C981 provides eight integral twisted-pair medium attachment units (MAUs) and an attachment unit interface (AUI) port in an 84-pin plastic leaded chip carrier (PLCC). A network based on the 10BASE-T standard uses unshielded twisted-pair cables, thereby providing an economical solution to networking by allowing the use of low-cost unshielded twisted-pair (UTP) cable or existing telephone wiring.