RE: 3PMD Proposal
Ed and All:
Basically you are right.
It is more of the implementation practice of an individual company, than the
specification issue. However, each company is responsible for its practice
with a reliable method to differentiate the DMD fibers from others.
Furthermore, there must be a contingent plan to implement the off-set patch
code, when the need is identified.
Edward S. Chang
NetWorth Technologies, Inc.
My understanding of real world implementations is that 85-90% of links that
use LX modules on legacy MMF do not use the external mode conditioning
patchcord. I realize we have to standardize for practically worst case
conditions, however I don't believe the mode conditioning patchcord will
become neccessary in a large number of installations. Am I totally off here?
SMF is a yes up to 10km.
> From: Joel Goergen[SMTP:joel@xxxxxxxxxxxxxxxxxxx]
> Reply To: joel@xxxxxxxxxxxxxxxxxxx
> Sent: Tuesday, June 13, 2000 12:58 PM
> To: Stds-802-3-Hssg@xxxxxxxx
> Subject: Re: 3PMD Proposal
> I pretty much think you are asking the wrong question. I haven't run in
> to anyone working inside an LE or POP that likes the patch cord. They
> use them because they have to. There has to be some way to meet the
> criteria without using this method of a patch cord. And yes, there are
> customers that are pulling new fiber because they don't want to
> use/maintain the patch cords ...... by choice, not because I have asked
> I think you might be missing my point, heck, I might be missing it :) -
> have you noticed how many people are involved in this standard? Have you
> noticed that there are people, myself included, that have been paying
> attention, but yet missed some details (we can't cover every issue :) )?
> This think is getting huge ..... and I made my comment as an attempt to
> keep things, from my view point, slightly easier for the customer type
> that I personally get involved with.
> Andreas Bechtolsheim wrote:
> > > I have to agree with Larry's thoughts 'Arghhhh!!!'. I would opt to
> > > scrap the 1300 nm wwdm solution if a patch cord is required.
> > So what do you prefer: asking the customer to pull new fiber
> > or not plugging into the installed based of MMF?
> Joel Goergen
> Force10 Networks
> 1440 McCarthy blvd
> Milpitas, Ca, 95035
> Email: joel@xxxxxxxxxxxxxxxxxxx
> Direct: (408) 571-3694
> Cell: (612) 670-5930
> Fax: (408) 571-3550