DMZ32 24-line Asynchronous Multiplexer User Guide

This document is the User Guide for the DMZ32 24-Line Asynchronous Multiplexer, a preliminary release dated March 14, 1984, intended for internal use.

The guide provides a comprehensive overview of the DMZ32, describing its:

• Features and Capabilities: A 24-line asynchronous multiplexer supporting speeds up to 19.2K bps, with split baud rates, modem control, transmit/receive character silos, and DMA capability. It consists of a UNIBUS Interface Module (M8398) and a Remote Distribution Panel (H3014).
• System Operation: Details how data is transmitted and received, including Program Mode and DMA Mode for transmit, and the use of T1 (T-Carrier) transmission techniques for communication between components.
• Installation: Provides procedures for unpacking, inspection, device address and vector assignments, and detailed steps for installing the M8398 module, H3014 distribution panel, and cabling, along with a final installation checkout.
• Programming: Explains the various device registers that control the DMZ32's operation, including Octet Control and Status Registers, Line Parameter Registers, Receive Buffer Registers, and Indirect Registers, along with initial operation and parameter initialization.
• Service and Troubleshooting: Covers field replaceable units (FRUs), preventive maintenance, self-test diagnostics, various hardware and software loopback methods (including EVDAE and EVDAF diagnostics), front panel indicators, and detailed removal/replacement procedures for the system's components.

The document is designed as a stand-alone resource, aimed at guiding users through the setup, configuration, and maintenance of the DMZ32, based on a module replacement philosophy for troubleshooting.