DECrepeater 900SL Installation

This document is an installation and reference guide for the DECrepeater 900SL, a Token Ring repeater manufactured by Digital Equipment Corporation.

Key information provided:

• Product Description: The DECrepeater 900SL operates at 4 or 16 Mb/s, extends trunk and lobe distances for shielded 150-ohm cable, and can be used within a DEChub 900 MultiSwitch or as a standalone unit (DEChub ONE Repeater 900SL). It can also be managed by optional HUBwatch software.
• Physical Features: Detailed explanations of the front panel LEDs (Power, Module OK, Ring A/B, Speed, Ring In/Out), switches (Speed, Autowrap, Reset), and ports (Ring In/Out). The rear panel's power connector for standalone units is also described.
• Installation Procedures: Step-by-step instructions for installing the DECrepeater 900SL in a DEChub 900 MultiSwitch (including rear cover removal, speed setting, and physical integration) and for setting up a standalone DEChub ONE Repeater 900SL (mounting options, speed setting, power connection, and network cabling).
• Network Connections: Guidance on connecting the repeater to adjacent MAUs, other repeaters, or stations, including how to set Autowrap switches.
• Cabling Guidelines: Tables and recommendations for maximum cable lengths (STP) between active units and passive MAUs at both 4 Mb/s and 16 Mb/s speeds, along with configuration notes for multiple hubs and wiring closets.
• LED Summary: A comprehensive table explaining the meaning of all LED states (on, off, flashing patterns) to help users understand the repeater's operational status and potential issues.
• Problem Solving: A detailed troubleshooting guide with common issues (e.g., no power, failed self-test, LED patterns, connection problems) and corresponding solutions.
• Product Specifications: Technical specifications including dimensions, weight, operating conditions (temperature, humidity, altitude), power requirements, connectors, and agency certifications (CE, CSA, FCC, TÜV, UL, VCCI, VDE).
• Regulatory Notices: FCC and VCCI compliance statements regarding radio frequency interference.

The document serves as a complete manual for installing, configuring, operating, and basic troubleshooting of the DECrepeater 900SL.