Bay Networks DSDE 5430 Dual Sync Dual Ethernet Module Card P102279

Bay Networks DSDE 5430 Dual Sync Dual Ethernet Module Card P102279

The Bay Networks DSDE 5430 is a Dual Synchronous, Dual Ethernet interface module card designed for use in Bay Networks modular chassis-based networking systems. The card provides two synchronous serial ports and two Ethernet interfaces, allowing a single slot to handle both WAN-side synchronous serial connectivity and LAN-side Ethernet bridging or routing functions. It is identified by part number P102279 and carries the DSDE 5430 designation on its faceplate.

Specifications & What's Included

• Model: DSDE 5430
• Manufacturer Part Number (MPN): P102279
• Type: Dual Synchronous Serial / Dual Ethernet combination module card
• Form Factor: Card/Module (rack chassis-mount)
• Front Faceplate: Four DB15 (D-Sub 15-pin) connectors — two synchronous serial ports (labeled RCVR/XMT) and two Ethernet ports
• LED Indicators: Green status LEDs and red FAIL indicator per port on the faceplate
• On-board DIP Switches: Blue 6-position DIP switch block and red DIP switch arrays on card edge for configuration
• Bus Interface: Card-edge bus connector for chassis backplane
• PCB: Multi-layer gold-trace board populated with multiple VLSI processor ICs, SRAM, and support logic
• Included: Module card only — no cables or chassis included

Applications

The DSDE 5430 is a module for Bay Networks' (formerly SynOptics, later acquired by Nortel Networks) modular router and hub chassis platforms, which were widely deployed in enterprise LAN/WAN environments during the 1990s. Bay Networks built a family of modular, slot-based networking chassis that accepted interface cards for Ethernet, Token Ring, FDDI, and synchronous serial WAN links. A combination card like the DSDE 5430 — providing both synchronous serial (for leased-line or Frame Relay WAN connections) and Ethernet (for LAN segments) in a single module — was a practical space-saving option for branch office or campus core routers of the era. These systems were common in financial, government, university, and enterprise network infrastructure through the mid-to-late 1990s. Today this card is primarily sought by network engineers maintaining legacy Bay Networks installations, collectors of 1990s networking hardware, and parts/repair operations.