DELNI Installation/Owner's Manual

This document is the DELNI Installation/Owner's Manual (EK-DELNI-IN-002), prepared by Digital Equipment Corporation, with editions from July 1983 and June 1984.

Purpose: The manual provides instructions for installing, operating, and troubleshooting the DELNI (DIGITAL ETHERNET Local Network Interconnect) unit. The DELNI is an electronic device that enables Ethernet workstations to communicate using the Ethernet network transmission system. It functions at the physical level of the Ethernet system and does not require software adjustments for its operation.

Key Features & Configurations:

• Workstation Connection: The DELNI unit has 8 connectors for workstations (Ethernet devices).
• Standalone LAN: A single DELNI can form a Local Area Network (LAN) for up to eight workstations.
• Two-Tier LAN: Multiple DELNI units can be connected to each other to expand the network and allow more stations to communicate.
• Integration with Larger Networks: DELNI LANs can connect to a larger Ethernet system via an ETHERJACK junction box or directly to an Ethernet transceiver, using the unit's ninth connector.
• Flexibility: Workstations can be added or removed at any time without disturbing the network.

Installation Process:

1. Preparation: Ensure all workstations are working, install Ethernet controllers, and plan cable lengths, considering specific restrictions for certain controllers (e.g., DEUNA).
2. Placement: Position the DELNI unit conveniently, ensuring cables can reach, it's near a power source (within 2 meters/6 feet), and it's away from dust, direct sunlight, and heat. (Caution: If fully cabled, do not place more than 76 cm/30 inches above the floor to prevent tipping).
3. Cable Connection: Connect workstation cables to the 8 primary ports. If connecting to another DELNI, ETHERJACK, or transceiver, use the ninth port with a specific cable (Part Number BNE3).
4. Switch Settings: Set the standalone/connected switch (symbol for connected, ☑ for standalone) and the voltage select switch (100-120V or 220-240V).
5. Power: Insert the power cable and plug it into a wall socket. A green light on the connector panel indicates correct installation.

Troubleshooting:

• Green Light Off: Check power at the socket, verify the voltage selection switch, and replace the 0.5 amp time-delay fuse if necessary. If the light remains off, the unit requires replacement.
• Other Hardware Problems: Use a substitution method to identify faulty components (workstation, cable, or DELNI unit). Test by swapping with known working parts.
• Software Problems: While the DELNI itself doesn't use software, communication issues might arise from incorrect or outdated Ethernet network software on the workstations. Ensure the latest version is installed.

Service Options: Digital Equipment Corporation offers various support services, including:

• On-Site Service: Technicians perform maintenance at the customer's location.
• Carry-In Service: Available at Digital Servicenters worldwide.
• DECmailer: A low-cost repair service for modules and subassemblies with a five-day turnaround.
• Spare Parts: Support for inventory planning, test equipment, documentation, and emergency parts.
• Other Services: Network planning, installation, and consultations. Users are advised to troubleshoot thoroughly, have the unit's serial number, and summarize the problem before contacting Digital's support numbers (provided for different US regions).

Specifications: The manual includes detailed specifications for the DELNI unit, such as dimensions (tabletop and rack mount), weight (14 lb/6.4 kg), number and type of connectors, electrical requirements (90-128 Vac or 180-256 Vac), frequency (47-63 Hz), power consumption (17W/26W connected, 12W/19W standalone), fuse type (3 AG, 0.5 A), data transfer rate (10 Mbits/second), and operating temperature range (5°C to 50°C). Appendix B specifically details cable length restrictions when using DEUNA controllers with PDP-11 and VAX-11 systems in various DELNI configurations.