FDDI hubs are used to transmit data over a network. FDDI (Fiber Distributed Data Interface) runs on fiber optic lines and uses token rings to transmit data. The primary ring can run at 100 Mbps. A second ring is used for backup but can also carry data, doubling the transmission speed. FDDI can support thousands of users and large geographic areas and is an ideal solution for a Wide Area Network (WAN).

FDDI can offer a secure and reliable network, but has lost popularity to gigabyte Ethernet. In addition, FDDI hubs have largely been replaced by switches and other technology and are no longer produced. Some things to consider when choosing a used FDDI Ethernet hub:

1. Find an FDDI network hub made by an existing company that offers support.

2. Choose a reseller of FDDI hubs that offers warranties and support.

3. Get FDDI hubs parts and accessories to keep your hub running.

Action Steps
The best contacts and resources to help you get it done

Check out 3COM FDDI computer hubs

FDDI hubs from 3Com offer powerful fault tolerant technology. A used 3Com FDDI hub is useful to have as a spare for quick repairs and replacements.

I recommend: MTMnet carries a wide selection of Cisco FDDI hubs and offers support contracts and a 90-day warranty. Network Outfitters has modules for 3Com FDDI hubs. Get support for FDDI hubs from 3Com.

Find FDDI hubs manufactured by Cisco

Cisco offers FDDI hubs that are stackable, compact and versatile. Cisco does not offer FDDI hubs for sale, but many resellers provide used and refurbished Cisco FDDI hubs.

I recommend: Cisco Systems offers support, downloads and product literature for its line of FDDI hubs. ITParade offers switch module replacements for Cisco FDDI hubs. Network Hardware Resale provides Cisco FDDI hubs and parts.

Get FDDI network hubs from Fore Systems

Fore Systems was an early network company now owned by Ericsson. Their FDDI hubs, including the PowerHub series, are innovative and powerful FDDI hubs that are easy to configure and support. The base unit offers 12 10Base-T Ethernet segments that can be expanded.

I recommend: IT Hardware carries Fore Systems hubs, modules and parts. TamayaTech carries the Fore Systems PowerHub as well as modules.

Get FDDI cable from a FDDI hubs provider

FDDI compliant cable is necessary to connect devices to the hub.

I recommend: Get FDDI cable from Provantage. Computer Cable Makers offers cable as well as adaptors.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Buy in bulk to save money on cable for FDDI computer hubs.
• •  Find out about warranty and return options before purchasing FDDI network hubs from an online retailer. The company may offer a short warranty period or no warranty at all. Also inquire about the requirements for returning the unit if it doesn't function. You may be liable for the cost of shipping and a restocking fee.