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Conference 7.286::fddi

Title:	FDDI - The Next Generation

Moderator:	NETCAD::STEFANI

Created:	Thu Apr 27 1989
Last Modified:	Thu Jun 05 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	2259
Total number of notes:	8590

878.0. "FDDI on multimode, urgent" by HGOVC::LEUNGWINGKIN () Fri Feb 26 1993 22:21

    
    Is there any FDDI product in Digital supporting multimode fiber of 6Km
    in length?  We have a customer who has already installed multimode
    fiber and will like to run FDDI on it.
    
    At least two vendors claiming that they have the products?  Are they
    using proprietary solution?
    
    Any alternate solution?  T3/E3 solution is workable but it is not what
    our customer wants.
    
    Thanks in advance

T.R Title User Personal
Name Date Lines

878.1 2 km is the supported limit ASDS::LEVY Fri Mar 19 1993 14:53 7

T.R	Title	User	Personal Name	Date	Lines
878.1	2 km is the supported limit	ASDS::LEVY		`Fri Mar 19 1993 14:53`	7
	The short answer is no. The multimode PMD specifies 2 km as the maximum distance between stations, so any vendor claim to the contrary is not consistent with the PMD. Having said that does not mean a particular 6 km link won't work. Using a high-bandwidth fiber and LEDs with lots of margin, a 6 km mm link would work. But it's not a repeatable, or supportable, configuration.

    The short answer is no. The multimode PMD specifies 2 km as the maximum
    distance between stations, so any vendor claim to the contrary is not
    consistent with the PMD.
    
    Having said that does not mean a particular 6 km link won't work. Using
    a high-bandwidth fiber and LEDs with lots of margin, a 6 km mm link
    would work. But it's not a repeatable, or supportable, configuration.