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Conference netcad::hub_mgnt

Title:	DEChub/HUBwatch/PROBEwatch CONFERENCE
Notice:	Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7
Moderator:	NETCAD::COLELLADT

Created:	Wed Nov 13 1991
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	4455
Total number of notes:	16761

1625.0. "DECswitch 900EF and SMF" by DPDMAI::DAVIES (Mark, SCA Area Network Consultant) Thu Oct 27 1994 11:58

    My customer is going to have SMF connecting his different buildings in
    the city of Oklahoma City.  The SMF comes from a vendor stringing fiber
    thruout the city to provide MAN capabilities.
    
    They are going to use DEChub 900s connected together FDDI as the
    backbone and then ethernet (shared and personal) to the desktop.
    
    The current DECswitch 900EF only supports MMF.  I am aware that the
    current SMF PMD for the DECconcentrator 900MX has a fiber loop which
    requires it to take up the space of 2 ports on the concentrator.  I am
    also aware that a "new" SMF PMD is coming in the near future and it is
    smaller and only requires a single port "worth of space".
    
    What I am getting to is the following question:
    
    	Will the DECswitch 900EF support SMF when the new PMD is available?
    
    If not, the customer is very aware that he will have to use up a slot
    and $$$ to put a DECconcentrator 900MX into each DEChub 900. 
    
    He asks me why we have modular FDDI PMDs for all the other backbone
    products (GIGAswitch and DECconcentrator) and not for the 900EF.  My
    only thought is that the current SMF PMD will not fit.
    
    Trying to save a sale in OKC.
    
    Thanks,
    
    Mark

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1625.1 DECswitch 900EF won't support SMF in HUB config, but... NETCAD::BATTERSBY Thu Oct 27 1994 12:22 13

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1625.1	DECswitch 900EF won't support SMF in HUB config, but...	NETCAD::BATTERSBY		`Thu Oct 27 1994 12:22`	13
	The MMF PMD's and the SMF PMD's do not share the same PC board footprint. There are also a lot of other physical and technical reasons why mod pmds were not used in the 900EF design. Things physically would not fit, without a lot of other design compromises amongst other things. So the 900EF module will not support the SMF while plugged into a HUB. However, the 900EF will support in the next wave release, the SMF PMD's when used in conjunction with the new High End docking station (the proper option name escapes me for the moment) that has mod pmds. This is the same version of the docking station used in conjunction with the PEswitch 900TX when configured in stand-alone. Bob

    The MMF PMD's and the SMF PMD's do not share the same PC
    board footprint. There are also a lot of other physical and 
    technical reasons why mod pmds were not used in the 900EF design.
    Things physically would not fit, without a lot of other design
    compromises amongst other things. So the 900EF module will not 
    support the SMF while plugged into a HUB. However, the 900EF *will*
    support in the next wave release, the SMF PMD's when used
    in conjunction with the new High End docking station (the proper
    option name escapes me for the moment) that has mod pmds. This is 
    the same version of the docking station used in conjunction with the
    PEswitch 900TX when configured in stand-alone. 
    
    Bob