Tellabs SPM 81.5501C 128 MEG System Processor Telecom Network Module Card

Module appears pre-owned with light cosmetic wear on the front panel and box exterior. Connectors, edge contacts, and components are intact with clean surfaces and straight pins. Includes foam-lined Tellabs cardboard box; no additional accessories.

Brand: Tellabs

Model: SPM System Processor Module telecom network circuit board

MPN: 81.5501C

Memory: 128 MEG (128MB) capacity indicated on the module front panel

Front panel details: off-white faceplate with Tellabs logo, SPM 81.5501C 128 MEG text, APM and CPM status indicators, in service/active/fault LEDs, static sensitive warning, and a metal ejector handle for rack or chassis installation

Board design: large green multi-layer PCB with plug-in edge connectors, a daughter memory module populated with multiple ICs, black heatsink assembly, and mixed surface-mount and through-hole components

Chip and board markings include a Winbond W83C553F-G controller, Motorola 1999 logo, and various labeled reference designators and test points

Packaging: housed in a foam-lined Tellabs cardboard box with exterior label referencing LAN Switch Module LSM and shipping/order details

Keywords: Tellabs SPM 81.5501C, system processor module, telecom network card, 128MB memory board

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