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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

1139.0. "SMF spec again" by COMICS::REYNOLDS (Mad Dogs and Englishmen) Thu Nov 04 1993 12:38

    
    Hi,
    
          has anyone got an update for note 289 re: single mode fibre spec?
    
    I need to know the standard that our DECconcentrator single mode
    cards follow ( I believe the actual interface is AT&T?)  - and
    if this or any relevant information is available on line.
    
    If not, does anyone know the absolute (average) power output of
    the SMF transmitter (in +/- dBm)?
    
    thanks,
    
               John Reynolds, Communications Unit
T.RTitleUserPersonal
Name		DateLines
1139.1Some answersLEVERS::KIRKtis a gift to be simpleFri Nov 05 1993 09:1324
    John,
    
    	    I am not exactly sure what your question is. Do you want an
    	update on the ANSI/EIA/TIA single-mode fiber specification?
    	Or are you asking about the output optical power of our SMF
    	product?
    
    	The optical output power of the laser is  - 8.0 dBm  (min).
    
    	The status of the US standard for SMF is an ugly story. I had
    	a version of the specification ready for SP (final) ballot. The
    	specification committee had a different opinion, however, because
    	they finally admitted that their specification system was not
    	adequate. They decided to table my specification until the
    	system documents could be revised. That has now been done. So I
    	have to re-write the specification to fit the new document system,
    	submit it for a letter ballot (or 2, or 3, or ...), and then
    	for a standards proposal ballot.  All optical parameters will
    	be the same as in the previous version.
    
    
    	Dick Kirk
    	Optical PMD Engineering
    	Network Engineering
1139.2COMICS::REYNOLDSMad Dogs and EnglishmenFri Nov 05 1993 10:1014
    
    Dick,
    
            thanks for your reply - I was asking two questions, one
    in relation to the other. The latest on the SMF spec then is that 
    there is still no standard?
    
    I have a customer asking about our DECconcentrator SMF card option -
    he is concerned with interoperability with 3rd party products.
    Do you have a copy of the Digital spec for the product I could get
    hold of? 
    
    thanks,
              John.