CDDI

(Copper Distributed Data Interface) A version of FDDI that uses UTP (unshielded twisted pair) wires rather than optical fiber. The technology was developed by Crescendo Communications, Sunnyvale, CA, which was acquired by Cisco in 1993. ANSI's standard for FDDI over UTP is officially TP-PMD (Twisted Pair-Physical Media Dependent).

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CDDI is a customary name^[1] for Fiber Distributed Data Interface copper twisted pair physical medium dependent specification, described in ANSI X3.263-1995 (developed by ANSI X3T12 standard, formerly ANSI X3T9.5).

References

1. ^ Fiber Distributed Data Interface (FDDI)

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