Cabletron SPIM-A DB-15 AUI IEEE 802.3 1-Port Repeater Module

Cabletron SPIM-A DB-15 AUI IEEE 802.3 1-Port Repeater Module

The Cabletron SPIM-A is an AUI (Attachment Unit Interface) repeater module designed for classic Ethernet networks. This single-port repeater connects to a 10Base5 thick Ethernet cable segment via the AUI DB-15 connector and is used to extend network reach and regenerate signals across legacy network topologies. The SPIM-A repeater module operates in accordance with IEEE 802.3 specifications and was a standard component in 1980s and early 1990s Ethernet infrastructure.

Specifications & What's Included

• Model: Cabletron SPIM-A
• Type: 1-Port Ethernet Repeater Module
• Interface: AUI (DB-15 connector)
• Standards: IEEE 802.3 10Base5
• Network Type: Ethernet
• Form Factor: Module/Card
• Connector Type: DB-15 (AUI)

Applications

Ethernet repeaters like the SPIM-A were essential components in early local area network (LAN) infrastructure during the 1980s and 1990s, when thick Ethernet (10Base5) was a dominant LAN standard. These modules served to extend the electrical reach of Ethernet cable segments, allowing networks to exceed single-cable distance limitations by regenerating and retransmitting signals. The SPIM-A would have been used in enterprise data centers, office networks, and institutional environments to build multi-segment Ethernet systems. Today, these modules are primarily of interest to vintage computing enthusiasts, network historians, and legacy system maintainers working with period-accurate Ethernet equipment.