Re: [802.3BA] Longer OM3 Reach Objective
Both are 12 strand fiber small footprint
connectors. Two different manufacturers. I see MPO more often
Carrie Higbie
Global Director
Data Center Solutions and Services
Phone: 601-605-4359
Cell: 601-624-4021
Fax: 601-510-9324
Skype ID - chigbie
| Frank Chang <ychang@VITESSE.COM>
03/17/2008 01:44 PM
|
Please respond to
Frank Chang <ychang@VITESSE.COM> |
|
|
To
| STDS-802-3-HSSG@LISTSERV.IEEE.ORG
|
|
cc
|
|
|
Subject
| Re: [802.3BA] Longer OM3 Reach Objective |
|
Brad;
MPO/MTP are the key parallel optics
connectors. If I recall right MPO=multifiber push-on, MTP is its enhanced
version.
Actually several mtgs in the past
talked about this extensively, just for one example in aronson_01_0907.pdf
(slide#13-14).
Frank
From: Brad Booth [mailto:bbooth@amcc.com]
Sent: Monday, March 17, 2008 10:32 AM
To: STDS-802-3-HSSG@listserv.ieee.org
Subject: Re: [802.3BA] Longer OM3 Reach Objective
Jonathan,
Thanks for the information.
What is an MPO? I have not seen that
acronym before.
Thanks,
Brad
From: Jonathan Jew [mailto:jew@j-and-m.com]
Sent: Mon 3/17/2008 11:01 AM
To: STDS-802-3-HSSG@LISTSERV.IEEE.ORG
Subject: Re: [802.3BA] Longer OM3 Reach Objective
Brad
There is no specified reach
for backbone cabling – it is limited only by the size of the data center.
So this is indeed different from horizontal cabling, which is generally
limited to 100 m except when centralized optical fiber configurations are
used, in which case horizontal cabling is limited to 300 m.
OM3 is the most commonly
specified fiber type specified by my clients for backbone cabling in data
centers. The mix of installations using parallel fibers (i.e. terminated
on MPOs) increasingly common. I would say that at least half of my
clients are now using fibers terminated on MPOs regardless of distances,
as they simplify installation and reduce the need for skilled labor.
Regards,
Jonathan
From: Brad Booth [mailto:bbooth@AMCC.COM]
Sent: Friday, March 14, 2008 1:25 PM
To: STDS-802-3-HSSG@LISTSERV.IEEE.ORG
Subject: Re: [802.3BA] Longer OM3 Reach Objective
Jonathan,
Can you provide some clarification for those
of us not well-versed in data center fiber optic cabling installation practices?
Is there a specified reach for a backbone?
Is that a different specification from horizontal cabling?
In your estimation, how many backbones have
OM3 fiber deployed in them? For the 150m fiber deployments, are they
parallel fibers? Or is there an assumption that WDM optics will be
used?
It would help tremendously to understand
these items as they relate to a possible modification of the reach and
the impact in the architectures and relative costs.
Thanks,
Brad
From: Jonathan Jew [mailto:jew@j-and-m.com]
Sent: Fri 3/14/2008 12:32 PM
To: STDS-802-3-HSSG@LISTSERV.IEEE.ORG
Subject: [802.3BA] Longer OM3 Reach Objective
I am a consultant with over 25 years
experience in data center
infrastructure design and data center relocations including in excess of
50
data centers totaling 2 million+ sq ft. I am currently engaged in
data
center projects for one of the two top credit card processing firms and
one
of the two top computer manufacturers.
I'm concerned about the 100m OM3 reach objective, as it does not cover
an
adequate number (>95%) of backbone (access-to-distribution and
distribution-to-core switch) channels for most of my clients' data centers.
Based on a review of my current and past projects, I expect that a 150m
or
larger reach objective would be more suitable. It appears that some
of the
data presented by others to the task force, such as Alan Flatman's Data
Centre Link Survey supports my impression.
There is a pretty strong correlation between the size of my clients' data
centers and the early adoption of new technologies such as higher speed
LAN
connectivity. It also stands to reason that larger data centers
have
higher bandwidth needs, particularly at the network core.
I strongly encourage you to consider a longer OM3 reach objective than
100m.
Jonathan Jew
President
J&M Consultants, Inc
jew@j-and-m.com
co-chair BICSI data center standards committee
vice-chair TIA TR-42.6 telecom administration subcommittee
vice-chair TIA TR-42.1.1 data center working group (during development
of
TIA-942)
USTAG representative to ISO/IEC JTC 1 SC25 WG3 data center standard adhoc