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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

4252.0. "Why no common parts 600 and 900 series???" by CGOS01::DMARLOWE (Have you been HUBbed lately?) Tue Mar 04 1997 12:10

    I have a 900EX with UTP Mod Phy's on a customer site.  They will also
    be evaluating a MS600EX with UTP Mod Phy's.  The kicker to all this is
    that the 900 UTP Mod Phy's are available and I can get the 612EX but
    won't be able to get a UTP Mod Phy until late March.
    
    WHY, WHY are the UTP (and probably the 100BaseFX) Mod Phy's different 
    between these 2 products???  It's painful for the field, distributors 
    and customers that there is such a long list of parts and no commonality.
    Not to mention more parts to build, test, certify and scarce
    engineering resources building multiple versions of the same part.
    
    I have a $2M account (over 2 years) in jeapordy because we are at least 
    a year behind in 100Mb.  They are going to flip when I tell them that 
    they cannot evaluate any 600 series because the Mod Phy's are different 
    than the ones in the 900EX, that they have right now, and that they
    will have to wait til late March.
    
    dave
T.RTitleUserPersonal
Name		DateLines
4252.1Why we didn't use the same form-factor as old mod-pmd's....NETCAD::BATTERSBYTue Mar 04 1997 13:1112
    My take on the difference in the older mod-pmd's and the newer
    ones is this. The older ones represent a circuitry technology
    design that is close to 6 years old. The newer mod-pmd's take
    up less physical space, use newer (read that "current") electronic
    chips and components that don't run the risk of going end-of-life
    anytime soon. There are other factors which contribute to the
    introduction of newer mechanical configurations I'm sure which
    include such things as cost, and return-on-tooling investment for
    recently introduced products (like the VNswitch, the 612EX), and
    future products.
    
    Bob
4252.2One newer than the other??CGOS01::DMARLOWEHave you been HUBbed lately?Tue Mar 04 1997 14:107
    re. .1
    In that case, which Mod Phy is based on "6" year old technology
    DEXYU-AA (900EX) or the DLXTX-MA (612EX) ?  Do either of these use the
    same components as the DEFXU-xx that's used in NIC cards or the FDDI
    GIGAswitch?
    
    dave
4252.3I think I cleared up part of my own confusion...but :-)NETCAD::BATTERSBYTue Mar 04 1997 14:5616
    Sorry Dave, I'm not sure what product you are referring to
    when you abbreviate as in "900EX".....are you referring to
    VNswitch 900EX?
    In any case, I'm as confused as you are about the mod-somethings.
    I just went out to our lab and got totally dazzled with mod-phy,
    mod-mac, mod-pmd.
    
    I was talking about the mod-pmd types that were used on the DECswitch
    900EF, 900MX wiring concentrators, Gigaswitch line cards etc.
    Those are the ones which have a physical form-factor legacy that
    dates back 6-7 years. The newer ones have chips different from
    each other, but are all new electronics compared to the old mod-pmd's
    I was referring to. Sorry for the confusion, as now having looked
    at a few, I'm now confused too.
    
    Bob
4252.4Maybe this helpsNETCAD::PERAROTue Mar 04 1997 16:1656
    
    When we were doing the documentation for these products, this is how
    the modular media interface family was defined. MMI is the term for a
    modular interface used in any NPB product.
    
    Families of MMIs
    -----------------
    MM-10s (Modular Media for ethernet. Today, used in the Hub 624T, adhers
    to AUI Interface standard. Plans for future use in other products.
    
    These include:
    			DLXFI 10BaseFL  MM-10
    			DLXAU 10Base5  
    			DLXUT 10BaseT
    			DLXTW 10Base2
    			DLXRA Reverse AUI
    
    MM-100s (For MII Fast ethernet modular media interfaces. Today used in
    the VNswitch and MultiSwitch 600, except for the MultiSwitch 612EX)
    
    	DEXYM-AA	100BaseTX
    	DEXYU-AA	100BaseFX MM-100
    	TBD		10BaseFL  MM-100
    
    Mod-Macs (For modular media interfaces with onboard MACS (limited
    lifetime) used in MultiSwitch 612EX Only)
    
    	DLXTX	100BaseTX Mod Mac
    	DLXFX	100BaseFX Mod Mac
    	DLXFL	10BaseFL Mod Mac
    
    ModPMDs (current FDDI (not front insertable) used in FDDI
    concentrators, GS/FDDI and one version of the VNswitch 900EF)
    
    ModPHYS (ATM, used in GS/ATM, VNswitch 900EA)
    
    	DAGGM-AA
    	DAGGU-AA
    	DAGGS-AA
    	DAGGE-AA
    	DAGGT-AA
    	DAGE1-AA
    	DAGT1-AA
    
    Mod FDDI (for new front insertable FDDI modular media interface.
    Currently used in one variant of the VNswitch 900EF).
    
    	DEFYM-AA
    	DEFYU-AA
    	DEFYS-AA
    
    I hope this helps a bit. We did this process for the documentation
    folks.
    
    Mary