DSV11-M Communications Option User Guide

This user guide, "DSV11-M Communications Option User Guide," provides instructions for connecting the DSV11-M two-channel, high-speed, synchronous communications option to external devices like modems or modem eliminators.

Key aspects covered include:

• Product Description: The DSV11-M is designed for MicroVAX II and BA200 series Q-bus systems, supporting synchronous protocols such as DDCMP, HDLC/SDLC, and BISYNC, and various interfaces including RS-423, RS-422, RS-232/V.24, and V.35.
• Prerequisites: The guide assumes the DSV11-M board is already physically installed in the system and that the appropriate device driver kit (VAX DSV11 Device Driver or VAX WAN Device Drivers) and networking software are installed and configured.
• Connection Procedures: It details the steps for attaching interface-specific adapter cables to the DSV11-M's distribution panel, and then connecting these to modems using extension cables. A critical note highlights that maximum line speeds can be limited by the length of these cables.
• Installation Testing: The document provides basic tests, primarily loopback tests using the Network Control Program (NCP) for DECnet and X.25 circuits, to verify correct cable connection and DSV11-M operation. It also offers initial troubleshooting steps if tests fail.
• Appendices: These sections list compatible cables and loopback test connectors, provide general specifications (environmental and electrical requirements), and detail the pin signals for various adapter cables.

The document is intended for users responsible for installing the external cables to connect the DSV11-M system to communication devices.