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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

1849.0. "Request for Amount of Fiber Required" by TROOA::KEGOODFELLOW () Tue Oct 31 1995 09:47

    We are responding to a large RFP for a Steel Mill and one of the 
    requirements is to provide a Backbone infa-structure within the Complex. 
    We will be proposing a FDDI network, but one of the requirements is to
     provide a recommendation for the amount of Fiber they will require to
     take them into the 21st century. 
     Does anyone have any pointers to information as to recommended fiber
    counts (multi-mode & single mode) along with documentation to back our
    recommendations.
     Any info would be greatly appreciated.
    
        Thank-you,
         Ken Goodfellow.
         DTN 631-2044 (Toronto)

T.R	Title	User	Personal Name	Date	Lines
1849.1	Lotza Fiba	SCAS02::TERPENING		`Tue Oct 31 1995 18:39`	12
	There is no good answer to that without knowing more about the plant and there is no document that states how much fiber to have. The safe answer I give to large customers (Refinerys and chemical plants, I am in Texas) is 144 strands of MM and 12 strands of SM. Also do NOT use ATT ribbon fiber, tough to terminate and they only warrent 95 % of the strands. Most settle for 48 MM and 6 SM and then have to buy more later, paying the labor charges twice. I have one customer who followed my 144/12 suggestion and had to add to it a year later! Hope this helps.
1849.2	I totally (?) Agree !	CIVPR1::MARKIS	Depends on Your Perspective, Ofcourse ...	`Mon Feb 12 1996 19:53`	33
	-< Lotza Fiba >- > There is no good answer to that without knowing more about the plant > and there is no document that states how much fiber to have. The safe > answer I give to large customers (Refinerys and chemical plants, I am > in Texas) is 144 strands of MM and 12 strands of SM. Also do NOT use > ATT ribbon fiber, tough to terminate and they only warrent 95 % of the > strands. Most settle for 48 MM and 6 SM and then have to buy more I agree. The Phone Company (Bell Atlantic -- I'm in Washington, (ugh) DC.) usually provides an overage of +75% for expansion. > later, paying the labor charges twice. I have one customer who followed > my 144/12 suggestion and had to add to it a year later! This customer probably isn't aware of the fact that Fiber has a "Multi-Gigabit" Bandwidth and that quite a bit of Data/Video/Audio/garbage (and/or combination) can be pumped through 1 - Pair using today's MUX's. They could have had a Dual SONET or even Single SONET Ring support everything imaginable ...... But then some people just don't want to share ..... So, go with the previous recommendation of "LOTZA FIBA", then when they run out of strands, "Enlighten them to what the "REAL" Bandwidth of Fiber is".... Chris 8^)