Tài liệu ADC KRONE Network News - Vol.13 No.1 - 2006 - Pdf 96

In this issue . . .

The New Era in Wireless LAN

Standards Update - 10G Ethernet Cabling

RiserGuide Fibre Cable Management System
Patch-by-Exception
Data Centre Delivers
Instant ROI
New
Networks
Australia Vol13 No.1 2006
W
elcome to the new look ADC KRONE
magazine. You may have noticed the new
name for this publication - New Networks. We
will continue to bring you all the great content
you regularly received including the latest news
and information on networks and cabling, along
with technical articles, case studies and industry
updates. I hope you enjoy the new format.
I’d like to introduce John Dulin, our recently
appointed Vice President of Sales for Asia Pacific.
John joins us from ADC headquarters in America,
where he most recently lead the Latin America
sales team. He has spent time with ADC in
Australia in recent years, in fact, John was part of
the team which initiated the Optus build 15 years
ago. John’s article on page 3 explains some of the
changes we have recently made to our sales

NETWO RKS
A NOTE FROM BOB FITZGERALD
ADC KRONE News
3 Serving Our Customers Better
7 Innovative Leadframe Jack Design
Wins ATUG Award
8 RiserGuide Fibre Cable
Management System
10 Ethernet’s Future Is Bright
Customer Stories
4 Datacom NZ Enjoys Instant ROI
With ADC KRONE’s PBE Solution
Technical Articles
11 Standards Update - 10 Gigabit
Ethernet Cabling
13 A New Era In Wireless LAN
Editor: Sarah Bishop
Art Direction: Nora Collins
Website: adckrone.com/au
CONTENTS
Copyright © 2006 ADC Communications (Australia) Pty. Limited
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3
SERVING OUR CUSTOMERS BETTER
John Dulin introduces the new sales structure for Australia and
New Zealand along with recent appointments in his Asia Pacific team.
Damien Rodgers has been appointed Sales Director, Enterprise
Australia and New Zealand. Damien brings a breadth of experience from

We now have two distinct areas within the sales
team - Enterprise Sales and Carrier Sales. This
alignment gives a higher level of expertise and an
improved communication link for customers in
each group.
A
cknowledged as a leader in the NZ systems
and outsourcing market, Datacom NZ (DNZ)
is the largest information and communications
technologies services firm in the country. DNZ’s
clients are high profile multinational companies
and Government Departments, who utilise its five
robust data centres located in Australia and New
Zealand.
Uptime is key to DNZ’s business and that of its
clients. When the company’s Datacom Systems
Limited Division decided to build a new data
centre at its Auckland headquarters from scratch,
it was imperative customers were provided with
an improved infrastructure which continued to
deliver security, reliability and, above all, the
agility to deploy systems.
DNZ wanted to move away from its current
system of patch panels sourced from a variety of
vendors and alleviate
the time-consuming
difficulty of under-
floor access to cables.
A project team
consisting of Datacom


secured uptime for data centre customer
network;

opportunity for more sales in data centre;

easy, cost-effective upgradeability to Gigabit
Ethernet in the future;

a 20-year guarantee of the PBE solution
components.
DNZ outsources the management of its cabling
system to Mark Leonard and the team at SCS.
Mark is certified as both a Master Installer and a
Network Designer.
RETURN ON INVESTMENT/TIME SAVED
In Mark’s estimation, the PBE solution at this data
centre has boosted his team’s efficiency by 250
per cent. A visit that would have taken two hours,
now only takes half an hour; a relocation move,
add or change that would also have taken two
hours can now be done in minutes. In
maintenance time alone, it has saved DNZ
approximately $45,000 per year since the facility
was completed.
As the data centre is a live facility, permission
has to be sought to work on the system. The
window for entry for the maintenance team is
set between 7pm and 7am to minimise any
possible disruptions to service for DNZ’s

floor tile outside the customer cabinet and
terminates a series of Category 6 cables to the
appropriate rack and then connects the necessary
jumper cable at the cross-connect frame to link
the rack outlet to the correct switch port. As each
customer is allocated an individual cabinet, there
is no chance of interrupting another client’s
service. So, new work does not impact existing
customers and the time saved in maintenance is
significant.
OPPORTUNITY FOR MORE SALES IN
DATA CENTRE
Data centre real estate is precious. The compact
PBE solution delivered the opportunity for the
DNZ project team to design a data centre to
maximise the number of customer cabinets able
to be accommodated. The Ultim8 disconnect
modules are mounted on the wall rather than
taking valuable floor space; cables are contained
within racks and cabinets for neat, vertical and
horizontal cable management.
DNZ also has increased the environmental
safety and security of the data centre. Anti-static
tiles are usually installed in these facilities to
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5
FROM ADC KRONE’s
Rear view Category 6 Cross-connect Frame

HighBand
®
Ultim8
®
disconnect modules

TrueNet Category 6 cable

KM8 Category 6 RJ45 outlets ■
6

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Continued from previous page
FL2000 FIBRE
PANELS
The FL2000 range is ADC KRONE’s advanced fibre
patching system. It is available in multiple
configurations and ideally suited to all enterprise and
data centre applications. The fibre panels are a
flexible, modular and economical, designed for both
19 inch and 23 inch rack systems. The panels are wall
mountable and available with accessories to ensure
compatibility with existing equipment.
FEATURES

Provides termination, splicing and storage
capabilities for in-building cables, outside
plant cables.


circuit board. Due to be released in February
2006, the product will suit the vast array of
cablers who are demanding more bandwidth in
order to deliver new services to their customers.
The award was presented to Jason Hogue, ADC
KRONE product engineer, who was instrumental
in the development of the new technology. The
award was presented at the Newcastle awards
night held on Thursday 24th November.
“The design of the Leadframe Jack is unique
and very complex,” said Hogue. “The technology
is difficult to manufacture, which is one reason
why other companies have not attempted this
particular design.
ADC KRONE’s regional product manager, Glen
Johnston explained this further. “Domestic and
commercial users are demanding more
bandwidth on their data networks to cope with
the high-speed transfer of large amounts of data.
To achieve this, network components such as
connector modules and wall outlets must be
capable of handling this throughput at high
frequencies without corrupting the data being
transferred. To achieve this in Leadframe design is
a technological breakthrough that will shape our
industry.”
While some of the technology in the new jack
was based on previous KRONE leadframe
technology, there were numerous hurdles in
redesigning not only the contacts, but also the

continues to innovate and improve FiberGuide
systems, adding greater flexibility and driving
down installation time to ensure a smooth
deployment.
Because cable management requirements
change with network requirements, the ADC
KRONE FiberGuide product family now includes
the riser guidance system, designed to both
complement and extend the capability of the
existing FiberGuide product range or use as a
stand alone management solution providing
horizontal and vertical cable management where
you need it, when you need it.
In the past, active equipment had far less fibre
to be managed. Now, as technology advances
forward the vast majority of network builds are
deploying small form factor connector technology.
This can provide double the available port density
to traditional connector types. With the increase
in port density comes an increase in patch cord
density and greater potential for network failure.
Now more than ever, customers are beginning to
realise cable management is becoming a make-
or-break issue that must be addressed to maintain
robust and secure networks, any network
downtime can result in reduced production time
and revenue streams.
RiserGuide safely and efficiently routes fibres
for optimum network performance. The system is
designed to assure that the correct bend radius is

for horizontal applications.
The RiserGuide system has been
designed so cable management can be
easily adapted with future network
configuration changes. This system is for
customers who require cable
management solutions that go beyond
the out-of-the-box solution that may
already be in place.

FiberGuide
®
Fibre Management System
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9
NT SYSTEM
FEATURES

Multiple standard width riser

Various components that can be installed
anywhere on the riser including storage
spools, radius limiters and cable guides

Mountable within and between racks and
in cabinets

Half and full slack storage spools available

lives, including home users who often don’t even
realize they are using Ethernet.
Today’s IP-friendly content and applications are
passed seamlessly through a complex Ethernet
network consisting of service providers, enterprise
networks, and consumers. Thus, Ethernet has
become the unifying platform that enables
communication of multiple forms of content -
voice, video and data - via the Internet and other
networks using Internet Protocol (IP).
For Service Providers, the writing is on the wall
- deploy Ethernet Services or lose business and
miss out on an expanding market. Ethernet is the
least expensive way to offer bandwidth and it
allows carriers to easily scale bandwidth to the
exact amount requested by their customers.
The Ethernet Alliance was created to further
facilitate the advancement of technology and
products based on IEEE 802 Ethernet standards.
The organisation will accelerate industry adoption
and remove barriers to market entry by providing
a coordinated, market responsive industry voice.
As a founding member of the Ethernet
Alliance, ADC KRONE will play a key role in
helping the Ethernet Alliance fulfil its mission of
increasing market acceptance and reducing time-
to-market of Ethernet products. We look forward
to helping the organisation advance Ethernet
technologies and products within the Enterprise
and beyond.

Activities for 2006 will focus on three key areas:
Ethernet technology research, interoperability
demonstrations and education. To promote
these, the Ethernet Alliance has started the
research process for 100 Gigabit Ethernet, has
initiated efforts to demonstrate 10GBASE-T,
10GBASE-LRM and backplane Ethernet
interoperability, and is planning to show
Consumer Electronic applications.

For more information, visit www.ethernetalliance.org or
contact Peter Meijer at
ETHERNET’S FUTURE IS BRIGHT
Announcing ADC KRONE’ s participation in the Ethernet Alliance,
supporting the advancement of IEEE 802 Ethernet Standards.
Carsten Quiram,
Marketing Director,
Asia Pacific
As a founding member of the Ethernet
Alliance, ADC KRONE will play a key role in
helping the Ethernet Alliance fulfil
its mission of increasing market
acceptance and reducing time-to-market
of Ethernet products.
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11
R
uns up to ‘55 metres’ on Category 6 cabling

article).
Power Sum Alien NEXT loss (PSANEXT) and
Power Sum Alien ELFEXT (PSAELFEXT) are the
parameters used to describe Alien Crosstalk (AXT)
performance.
Several mitigation techniques are mentioned in
TR 24750 to improve AXT performance for Cat 6
installations. Nearly all the recommendations
follow the ADC KRONE mantra of “Random lay in
the bundle and tray for Cat 6 cable and Cat 6
A
.”
TR 24750 also states that unbundling the Cat 6
cables in the cabinets and racks in the
Telecommunications Room will be extremely
helpful. (The ADC KRONE MasterMinder for rear
cable management behind patch panels comes to
mind for exactly this purpose). The most difficult
task will be convincing building owners and their
advisors that neat-looking straight parallel lines of
cables are now a bad thing from a performance
point of view.
ISO/IEC 11801 Edition 2 Amendment 1
Over 500 comments were received from the
worldwide committee members on the 1st
working draft of ISO/IEC 11801 Ed2.1. It was
agreed to call the performance levels for 10GBE
and beyond as Class E
A
and Class F

IL Class E IL extrapolated to 500 MHz Class F IL extrapolated to 500 MHz
RL Class E RL extrapolated to 500 MHz Class E RL extrapolated to 500 MHz
with 6dB plateau with 8 dB plateau at 251.2 MHz
NEXT Class E NEXT extrapolated to 330 MHz, Class E NEXT extrapolated to 500 MHz
then to 500MHz at 31-50log(f/330)
PSANEXT 47-10log(f/100) 1-100 MHz 80-10log(f) 1-100 MHz
47-15log(f/100) 100-500 MHz 90-15log(f) 100-500 MHz
PSAELFEXT 33.7-20log(f/100) 1-500 MHz 77-20log(f) 1-500 MHz
A summary of some 10GBE parameters for draft Class E and draft Class EA.
12

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important for 10GBE transmission and optimum
performance is always achieved without ‘mixing
and matching’.
The ISO Channel specifications for Class E
A
are
by now well understood and are unlikely to
change significantly. Even Alien Crosstalk
requirements are well defined for Class E
A
, but
there is still debate over the Class F
A
figures.
This standard will contain the “extrapolated”
NEXT passmark even though this was not an
initial requirement of the IEEE 802.3an

if the Power Sum Alien NEXT loss (PSANEXT) and
Power Sum Alien ELFEXT (PSAELFEXT) exceeds the
specifications of IEEE 802.3an Draft 2. Results
showed that unbundling these Cat 6 cables
significantly improves the alien crosstalk and can
result in performance consistent with IEEE
802.3an Draft 2 requirements for short cable
runs.
Upcoming meetings of TIA’s copper cabling
systems committee will put a priority on
recommending mitigation methods, including
unbundling cables and replacing equipment
cords. They expect more mitigation methods will
be develop to comply with 10GBASE-T Alien
Crosstalk requirements for installed Cat 6 cabling.
TIA/EIA 568-B.2-10
Newly installed Cat 6A cabling should not require
Alien Crosstalk mitigation techniques to the same
extent as Cat 6 cable because Cat 6A is designed
to meet the requirements of the IEEE 10GBE link
segment up to 100 metres.
The TIA 568-B.2-10 draft standard has over
300 outstanding comments that may take until
March to finally resolve.

ADC KRONE CopperTen™ 4-connector channel tested to
ISO and TIA 10GBE PSNEXT draft requirements showing
excellent headroom results.
ADC KRONE CopperTen™ 4-connector channel tested to
ISO and TIA 10GBE PSELFEXT draft requirements

54Mbps per access point (real-world throughput
22Mbps), only 10-12 active users can be handled
per access point.
One common approach to increasing capacity
is to simply add more access points on different
channels and to make sure that any two that are
on the same channel cannot hear each other.
The next most widely used approach to increase
capacity is to try to use smaller cell sizes to
increase the number of cells (access points) where
one re-uses the limited set of non-overlapping
channels. While these approaches are commonly
used, they create a number of major issues.
First, shrinking the cell size of an access point
by lowering the transmit power doesn’t lower the
transmit power of the wireless
station (client). Second, the
client’s transmit power and
receiver settings aren’t under the
control of the access point and
don’t change. By decreasing the
transmit power of the access point, the
overall cell size shrinks only slightly.
This concept of “extended
cell” is very important because
it sets a limit on how small cells
can really be. This is why some
recent solutions prescribe the
placement of an access point in
every cubicle and turning the

ADDING CAPACITY AND BANDWIDTH
As the previous section pointed out, using omni-
directional access points requires careful planning
to have at least one cell between other cells on
the same channel. This gets tricky with the limited
number of non-overlapping channels.
Having cells laid out on separate channels like
those in Part 1 below, allows for seven cells to be
on a unique channel. This pattern can be
repeated without interference between client
stations or access points (Part 2 below). If needed,
the number of access points in each cell can be
doubled by assigning them a completely different
set of channels. This requires fourteen unique
channels (Part 3 below).
The issue of adding more bandwidth (capacity)
becomes clear because there are only 12 802.11a
and 3802.11b/g non-overlapping channels that
can be used.
Therefore, you can only double the number of
channels in each cell to add capacity (12 + 3 = 15
channels; 15 channels/7 channels per reuse = 2
access points per cell).
HIDDEN NODE PROBLEMS
Omni-directional access points have another
inherent problem. A wireless station on one edge
of a cell may not hear a station on the other side
of the cell. As a
result, wireless
stations won’t be

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15
sectored approach creates sectors or “slices” of
cell coverage. Each sector uses a unique channel
and by its very design, clusters clients together on
the same channel under the area of the sectorised
antenna pattern.
Cellular network operators have long
understood this benefit and make use of sectored
base stations. Each WLAN Array can provide up to
810Mbps per cell if all twelve 802.11a channels
and three 802.11bg channels are used. This
pattern can be used over and over. With this the
WLAN Array provides eight times the capacity
than omni-directional solutions.
SECTORED ANTENNA SYSTEMS AND
HIDDEN NODES
A sectorised approach is vastly superior to that of
omni-directional in eliminating Hidden Node
issues, because all wireless stations (clients) in a
given RF sector are associated to the same radio;
so they are geometrically on the same side of the
WLAN Array. Since the clients exist in the same
sector, the hidden node problem is eliminated.
SECTORED SYSTEMS; MULTI-PATH AND
PERFORMANCE
As previously discussed, omni-directional access
points inherently create large amounts of

numbers of access points, a single WLAN Array
can be installed.
The WLAN Array architecture is completely
Wi-Fi interoperable. The products support all
three Wi-Fi modes: 802.11a, 802.11b,and
802.11g.
Lastly, the ADC KRONE approach frees IT
administrators from the hassles of managing a
sea of legacy omni-directional access points. The
fewer devices to manage, maintain, troubleshoot
and upgrade the better.

This material was supplied through ADC WHQ.
I NEED ONE TRUE NETWORK
INFRASTRUCTURE SOLUTION.
I need TrueNet
®
TrueNet is the high-performance
structured cabling solution that meets
your unique network needs. Your one true
network infrastructure solution, TrueNet is
the integrated portfolio of industry-leading
products from ADC KRONE.
True End-to-End Solution
Now your complete network
infrastructure needs are met by a single
global manufacturer. The TrueNet system
delivers proven cable, connectivity, and
cable management solutions for fibre,
10G Ethernet over UTP, and Category 6/5e


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