Table of Contents

Preparing for Installation

Preparing for Installation

Before installing the workgroup EISA SGI adapter, please read this chapter carefully.

Safety Recommendations

Follow these guidelines to ensure general safety:

Safety with Electricity

Follow these guidelines when working on equipment powered by electricity.

Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It occurs when electronic components are improperly handled and can result in complete or intermittent failures.

Always follow ESD-prevention procedures when removing and replacing components. Ensure that the chassis is electrically connected to earth ground. Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. Connect the clip to an unpainted surface of the chassis frame to safely channel unwanted ESD voltages to ground. To properly guard against ESD damage and shocks, the wrist strap and cord must operate effectively. If no wrist strap is available, ground yourself by touching the metal part of the chassis.

Warning For safety, periodically check the resistance value of the antistatic strap, which should be between 1 and 10 mega ohms (Mohms).

Site Requirements

Following are the site requirements for installation.


Choose a clean, dust free, (preferably) air-conditioned location. Avoid direct sunlight, heat sources, or areas with high levels of electromagnetic interference (EMI).

Adapter Accessibility

Because the adapter faceplate status indicators provide information that you may need to monitor, make the rear of the SGI Indigo2 workstaion accessible and leave sufficient clearance for cabling and service.


The source electrical outlet should be installed near the SGI Indigo2 workstation, easily accessible, and properly grounded. Power should come from a building branch circuit. Use a maximum breaker current rating of 20A for 110V or 8A for 230V. Note the power consumption ratings of each unit before you connect to a power source.

Cabling Requirements

Following are the cabling requirements for installation. For pinouts of the CDDI cabling, refer to the appendix, "Cabling and Pinout Information."


The multimode FDDI connectors on the workgroup EISA SGI adapter accept 62.5/125-micron or 50/125-micron multimode fiber, with standard FDDI media interface connector (MIC)-type connectors.

Table 2-1 lists FDDI distances and specifications and Figure 2-1 illustrates a multimode FDDI connector.

FDDI Maximum Transmission Distances
Transceiver Type Maximum Distance between Stations
Multimode 1.2 miles (up to 2 km)
Warning Invisible laser radiation may be emitted from the aperture ports of the single-mode FDDI card when no cable is connected. Avoid exposure and do not stare into open apertures.

Figure 2-1:
Multimode FDDI Interface Connector--MIC Type


Check all existing cables for conformance with CDDI/multilevel transmission (MLT-3) distance requirements and to ensure that you have the proper connectors (modular RJ-45). See the appendix, "Cabling and Pinout Information" for detailed cable usage.

Following are cable and distance specifications:

Electronics Industries Association/Telecommunications Industry Association (EIA/TIA)-568 category 5, data-grade cable is recommended for CDDI installations. The total length of data-grade UTP cable from the adapter or media attachment unit (MAU) to the switch must not exceed 330 feet (100.6 meters), including patch cords and cross-connect jumpers.
Use IBM Type 1 STP wiring for your CDDI installation. The total length of STP cable measured from the adapter or MAU to the switch can not exceed 330 feet (100.6 meters).

Note You must use high-performance, category 5, data-grade, modular cables for external connections.

When you plan your CDDI installation, remember the following:

Tools and Materials Required

To install the workgroup EISA SGI adapter, you need the following tools and supplies:

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