DECrepeater 90FA Owner's Manual

This owner's manual provides comprehensive guidance for the DECrepeater 90FA, a three-port repeater designed for IEEE 802.3 CSMA/CD networks. It features ThinWire (10Base2), fiber-optic (10Base-FL, with FOIRL compatibility), and 15-pin AUI Ethernet ports.

The document details how the DECrepeater 90FA can function as either a standalone, unmanaged unit or as a managed unit when installed in a DEChub 90 backplane alongside a DECbridge 90 series bridge.

Key areas covered include:

• Overview: Product features, LEDs, and connector descriptions.
• Configuration: Rules and constraints for network operation, including segment lengths and fiber considerations.
• Installation: Procedures for standalone setup (including wall-mounting) and integration into a DEChub 90 backplane.
• Management: Online management using the Maintenance Operations Protocol (MOP) via a DECbridge 90, covering command syntax, port status, address table annotation, and common management techniques.
• Troubleshooting: Guidance on diagnosing and resolving issues for both standalone and backplane configurations, including explanations of port partitioning and LED indicators.
• Appendices: Detailed specifications (physical, environmental, electrical), a parts list, additional management insights, and ordering information for related documentation.