Browse Prior Art Database

Fiber-Optic Bypass Switch Enclosure Assembly

IP.com Disclosure Number: IPCOM000100233D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 3 page(s) / 108K

Publishing Venue

IBM

Related People

Braidt, JW: AUTHOR [+2]

Abstract

Fiber-Optic Bypass Switch Enclosure Assembly houses a bulkhead-mounted connector for attachment to a Fiber Distributed Data Interface (FDDI) ring. The control unit (station) attachment to the Bypass assembly is via a short fiber-optic cable assembly and a power/signal cable.

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This is the abbreviated version, containing approximately 52% of the total text.

Fiber-Optic Bypass Switch Enclosure Assembly

       Fiber-Optic Bypass Switch Enclosure Assembly houses a
bulkhead-mounted connector for attachment to a Fiber Distributed Data
Interface (FDDI) ring.  The control unit (station) attachment to the
Bypass assembly is via a short fiber-optic cable assembly and a
power/signal cable.

      Fig. 1 shows the Fiber Optic Bypass Switch Enclosure Assembly
which includes the optical switch 1, the FDDI Media Interface
Connector (MIC) 2, FDDI MIC bulkhead adapter receptacle 3, power
connector 4, associated covers 5, mounting brackets 6, and mounting
hardware 7.

      This package design allows the bypass switch assembly to be
mounted directly to the station's FDDI logic card bezel with a
finger-operated thumbscrew, requiring no tools. The power/signal
connector plugs into the logic card for the control signal and a
voltage source.  The unjacketed fibers loop at required minimum bend
radii within the enclosure.

      When the assembly is connected to the station via the
electrical connector, the station can sense that it is installed via
the "Install Sense" jumper (see Fig. 2A).

      The bypass assembly has two modes of operation: operational and
bypass.

      In operational mode the bypass assembly optically connects the
station to the FDDI ring.  Fig. 2A shows the following optical
connections that are made in this mode:
-    Ring Optical Input (OI) to Station Optical Detector

      (OD)
-    Station Optical Source (OS) to Ring Optical Output (OO). In
Bypass Mode the bypass assembly bypasses the FDDI ring attachment.
Also in this mode a self-test path for the station is provided.  Fig.
2B shows the following optical connections that are made in this
mode: -    Ring Optical Input (OI) to Ring Optical Output (OO) -
Station Optical Source (OS) to Station Optical Detector (OD).

      The FDDI ring optically bypasses the station by connecting the
FDDI Ring's optical input (OI) to the optical output (OO).  The self-
test path connects the station's optical source (OS) to the opti...