FDDI


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FDDI

FDDI

FDDI

(Fiber Distributed Data Interface) Often pronounced "fiddy," it was a LAN and MAN access method that had its heyday in the mid-1990s. FDDI was an ANSI standard token passing network that transmitted 100 Mbps over optical fiber up to 10 kilometers. It included its own network management system and could optionally run over copper wire (CDDI) with distance limitations. FDDI II added circuit-switched service to this normally packet-switched technology in order to support isochronous traffic such as real-time voice and video.

Dual Rotating Rings
FDDI provided an optional dual counter-rotating ring topology that contained primary and secondary rings with data flowing in opposite directions. If a line broke, the ends of the primary and secondary rings were bridged together at the closest node to create a single ring again.

Single Attached and Dual Attached
Nodes could be configured as Single Attached Stations (SAS) connected to concentrators or as Dual Attached Stations (DAS) connected to both rings. Groups of stations were typically wired to concentrators connected in a hierarchical tree to the main ring. Large networks could be configured as a "dual ring of trees," in which the dual ring provided the backbone to which multiple hierarchies of concentrators were attached.


MIC Connector
FDDI used a dual-fiber MIC plug and socket for connection to devices.




MIC Connector
FDDI used a dual-fiber MIC plug and socket for connection to devices.
References in periodicals archive ?
Several unique solutions allow you to install Gigabit Ethernet on your existing fiber pairs and provide switched connectivity to your existing FDDI equipment.
This approach is particularly beneficial in FDDI scenarios where backbones are bogged down and enterprises are contemplating bandwidth solutions by adding a switching capability to their shared network.
The FDDI Gateway has been certified with HP-UX, OpenVMS, and Tru64.
USC University Hospital's network was reconfigured to use five EIFOs and one FDDI concentrator.
Another alternative to routers is to use a switching hub with FDDI modules, such as the LANplex 5000 Intelligent Switching Hub from Synernetics, Inc.
Whether FDDI customers are planning to transition to Gigabit Ethernet or ATM, they will have to look for vendors, like 3Com, that have the experience, technology and support to take them to the next level of converged networking.
Available today, the Fiber Driver has 51 different modules supporting Ethernet at 10/100/1000Mbps, FDDI, SONET at OC-3 and 12 as well as ATM.
With this, the government has also ensured upgradation of FDDI to a position of eminence so as to enable the Institute to effectively serve the Sector/Industry.
1 provides enhanced FDDI error-tracking features that include System Management (SMT) and media access control (MAC) packets, showing aggregate FDDI errors as well as FDDI errors by station.
Plaintree Systems today announced that it is shipping its FDDI and Router Accelerator Gigamodules for the company's WaveSwitch 9000 family of gigabit switches.
Continuing its investment in the MultiSwitch 900 platform while enabling customers to further extend the capability of FDDI in their networks, Cabletron Systems (NYSE:CS) today announced the availability of two new VNswitch modules - VNswitch 900FF and VNswitch 900FX.
Tenders are invited for Supply Of Electrical Items In Fddi, A-10/A, Sector-24,Fddi Noida (Up).