PCI FDDI Administrator's Guide

8
Cable Information
Below are cable specifications for the PCI FDDI Dual Attach adapter.
Product safety and/or regulatory conformance may depend upon
observance of the following information.
A and B Port Connections
The A and B ports on the adapter require one (SAS) or two (DAS)
standard 62.5/125 multimode fibre optic cable(s) with an SC-Duplex
connector. These cables are not provided and must be furnished by the
customer. For existing installations that use cables with MIC (Media
Interface Connector) connectors, SC to MIC cable adapter cables must be
ordered by specifying “Option 001”.
WARNING Never look directly into an optical fiber port. While not used or
supported by this adapter, some fiber optic equipment can emit
laser light that can injure your eyes. Always assume the cable is
connected to a light source.
Optical Bypass Relay Connection
The Optical Bypass Relay (OBR) connector allows the OBR device to
maintain integrity of the dual FDDI rings if the adapter fails or if system
power is removed. The OBR connector is an RJ-12 modular jack
connector. The pin assignments (counting from right to left, with pin 1 in
the rightmost position) are described in the list below.
WARNING Do not insert telecommunications cabling into the optical bypass
relay connector.
OBR RJ-12 Connector Pin Assignments
Pin 1, 2: Relay drive +5.0 V dc
Pin 3, 4: Bypass enable
Pin 5: Bypass present
Pin 6: Return grounded internally