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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

931.0. "any reference sites, Easynet usage, printers on FDDI" by MARVIN::MARVIN::STRATFORD () Fri Apr 16 1993 02:52

        Cross posted from NOTED::DECNIS conference - any reference sites,
        Easynet usage, and printer attachment to FDDI ?


          <<< NOTED::DISK$NOTES1:[NOTES$LIBRARY_1OF4]DECNIS.NOTE;1 >>>
                 -<  DEC Network Integration Server (DECNIS) >-
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Note 699.0                          FDDI LAN                          No replies
HGOVC::QCAV01::GOVINDARAJAN                          17 lines  15-APR-1993 23:49
--------------------------------------------------------------------------------
    I have the following querries reg FDDI LAN :-
    
    a) Some reference sites in the Industrial or manufacturing environment
       where DEC have implemented FDDI LAN.
    
    b) Are there any FDDI installations forming part of Easynet of DEC ?
    
    c) Can a heavy duty printer be connected directly to FDDI LAN or
       through a concentrator ? ie: Can a printer act as a SAS or DAS with
       a suitable interface card ?
    
    Shall be obliged for early response.
    
    Thanks and regards.
    
    Govindarajan @ QCAV01
    NIS DEIL.
T.RTitleUserPersonal
Name		DateLines
931.1QUIVER::STEFANIElvis is my psychic advisorFri Apr 16 1993 07:1621
>>    a) Some reference sites in the Industrial or manufacturing environment
>>       where DEC have implemented FDDI LAN.
    
    Pass on that one.
        
>>    b) Are there any FDDI installations forming part of Easynet of DEC ?
    
    I'm almost certain there is an FDDI connection between the King St.
    facilities (LKG1 & 2) and TAY2 which is part of our Easynet.
    
>>    c) Can a heavy duty printer be connected directly to FDDI LAN or
>>       through a concentrator ? ie: Can a printer act as a SAS or DAS with
>>       a suitable interface card ?
    
    I don't see why not.  FDDI is just another LAN specification, so if you
    can make an Ethernet ready printer, you should certainly be able to
    make an FDDI ready printer.  If anyone has that in mind, we sell a
    number of high performance FDDI controllers that can be used for this
    type of integration.  :-)
    
       - Larry
931.2KONING::KONINGPaul Koning, A-13683Fri Apr 16 1993 13:4917
I don't know what was actually installed, but there was a project with
Westinghouse to use FDDI as a factory control network.

There are plenty of FDDI installations in the Easynet.  TAY/LKG is one,
but I'm sure there are others.

FDDI for printers: I suppose that's possible, but given the slow speed of
even the fastest printers, would it be useful?  A 100 page per minute printer
prints about 8000 characters per second (at 60 lines of 80 characters per page).
Even if you assume PostScript has a 100% overhead (which is much too high
for simple jobs) that's only 16k bytes/second, or a little over 1% of Ethernet
capacity.  You'd need a printer capable of thousands of pages per minute before
it makes any sense to worry about the capacity of Ethernet.  (One possible
exception is bitmap images -- but there you're more likely to run into the
limitations of the print engine or print firmware than the network.)

	paul
931.3GE may be a referenceCSOA1::SEITZThe system is a NetworkTue Apr 20 1993 12:273
    I was involved in a design and implementation of a LARGE FDDI network
    for GE Aircraft Engine. Contact Rob Keller DTN:432-7587 for permission
    to use as a reference.