Chipcom 5103M-AUIM Ethernet Transceiver Module

The Chipcom 5103M-AUIM Ethernet Transceiver Module is a removable 10BASE-FB transceiver designed to work with Chipcom networking hardware, providing a fiber-based Ethernet link at 10 Mbps through an AUI interface. As part of the 5103M family, it serves as the physical-layer link between a system’s AUI port and a 10BASE-FB fiber-star network via a compatible star coupler, enabling multi-station Ethernet communication over fiber. This module is commonly used in legacy Chipcom installations (such as CoreBuilder/Online Ethernet configurations) as a replacement or upgrade part to maintain existing 10 Mbps fiber-based networks. In operation, the 5103M-AUIM translates Ethernet signaling between the host equipment and the fiber medium, supporting the 10BASE-FB topology that distributes signals across a fiber network through a central coupler. Buyers typically encounter this part as new-old-stock or surplus from distributors and listings that specify the 5103M-AUIM model, underscoring its role in vintage Ethernet deployments. For anyone maintaining or restoring a historic Chipcom system, the 5103M-AUIM offers a direct path to reestablishing fiber-enabled Ethernet connectivity at legacy speeds without upgrading the entire chassis.