Need Help? Get in touch, 24/7.
We're committed to providing the best customer service in the industry.

Black Box Brand Product Support                                      
Call: 787-767-3500                                                                  
(8am-5pm AST)

Technical Support
Call: 877-877-2269                                           

Or click "Talk With Us" in our top nav to chat with us or to have us call you.

Black Box Explains...FDDI

Fiber Distributed Data Interface (FDDI) is a networking standard for operating at speeds of up to 100 Mbps. The standard FDDI network is set up in a ring topology with two rings that transmit signals in opposite directions to a series of nodes. FDDI accommodates up to 500 nodes per dual-ring network with spacing up to 2 kilometers between adjacent nodes. FDDI uses the same token-passing scheme as the IEEE 802.5 Token Ring network to control transmission around the loop.