Communications Options

This document, dated June 1982, serves as a minireference manual for field service personnel to install and maintain various communication options for DEC hardware. It provides technical specifications, cabling diagrams, installation flowcharts, and diagnostic procedures for several options, including:

• DH11: 16-line asynchronous multiplexer.
• DMC11: Microprocessor-controlled synchronous controller.
• DMR11: Intelligent synchronous communications controller.
• DPV11: LSI-11 bus synchronous interface.
• DUP11: Double-buffered communications device.
• DZ11: 8-line asynchronous multiplexer.
• DF02/DF03: Modems.

The manual also includes detailed information on special test programs like DCLT and ITEP, general cable and connector references, and vendor modem options, along with technical tips and field change order (FCO) histories for the listed components.