DSH80 Option

This document serves as the installation and owner's manual for the DSH80 Synchronous/Asynchronous communications controller option designed for the DECsystem 5100. It covers the following key areas:

• System Requirements and Overview: Details the two modules (Sync Module One and Sync Module Two), required software (ULTRIX 4.2, DECnet Phase V), and supported protocols (HDLC and SDLC).
• Installation: Provides step-by-step procedures for installing the DSH80 option, including removing existing DHT80 options, managing drive shelves, and connecting internal cables.
• Diagnostics: Contains detailed procedures for performing power-up self-tests, configuring environment variables, and running diagnostic tests to verify synchronous and asynchronous line functionality.
• Specifications: Includes appendices covering field-replaceable units (FRUs), cable specifications, connector pinouts, and specific installation requirements for the United Kingdom.