Optical Fibre
EPON Copper
Ethernet Multiplexe
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Multiplexe
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Multiplexe
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Internet
Ethernet is a lower Router
complexity solution than Ethernet First Mile
traditional telecoms (e.g. What is Optical Ethernet? It is also designed to interface
SONET) and it Ethernet directly over fibre. easily to the SONET packet
interfaces to end user The reduced end to end format if required.
equipment directly. It is complexity can lead to faster
payback for operators. Three major versions were
now standardised at
defined in IEEE 802.3ae:
10Mb/s, 100Mb/s, 1Gb/s
Ethernet First Mile
and 10Gb/s. 10GBase-R LAN serial
EFM represents the missing link
in achieving end to end Ethernet 10GBase-W WAN serial
Also offering reduced connectivity. In other words no 10GBase-X WWDM
end to end complexity, translation of the packet is
Ethernet in the First Mile necessary between sender and For SONET WAN ‘friendliness’
(EFM) is underway as an receiver, and addressing is a WAN Interface Sublayer
IEEE802 standards unified. Under discussion in the (WIS) is included in 10GBase-
project. EFM promises IEEE 802.3ah task force are W at 9.953Gb/s. 10GBase-X
point to point and passively split provides a coarse WDM
to complete the
(EPON) optical solutions as solution with four channels of
‘Ethernet Everywhere’
well as point to point copper 3.125Gb/s. In addition,
picture by embracing different reach variants are
the access network. solutions. Furthermore, OAM
(Operations Administration and defined using SM, MM or
Maintenance) is considered to parallel fibre and multimode or
be a major requirement for an singlemode laser sources.
EFM standard.
Industry Watch
Single and dual fibre solutions
are under discussion at 100Mb/s Gigabit Ethernet is currently
and 1Gb/s rates. The DSL style being deployed over tens of
short copper solution will be kilometres in private networks.
around 10Mb/s and the long A direct result of this is the need
©Plextek Limited
reach around 2Mb/s. for multi-gigabit backbones for
10 Gigabit Ethernet the trunked traffic, hence 10
Plextek Limited, London Road,
Great Chesterford, Essex, CB10 1NY, UK Unlike previous Ethernet gigabit Ethernet. Where native
Telephone: +44 (0)1799 533200 speeds, 10Gb/s Ethernet Ethernet cannot be used, the
Fax: +44 (0)1799 533201
(10GigE) is intended only for WAN version can be employed
Website: http://www.plextek.co.uk to match SONET OC-192c
Email: mktg@plextek.co.uk full duplex fibre environments.
framing. Both serial forms of
Communications Technology gigabit Ethernet use a reduced
Consultants overhead 64B/66B line code.
Additionally, in shorter links,
coarse WDM may be used to SONET network
management
achieve 10Gb/s Ethernet centre
throughput, but by using only
10GigE Private
2.5Gb/s electronic interfaces. 10GigE Private Carrier CO
MAN
Such interfaces may use direct LAN
Carrier CO
laser modulation, including
VCSELs over links short
enough for chirp not to be a
problem. Such lower speed
parallel interfaces mean the end 10GigE over
SONET WDM
user never has to deal with an links
electrical stream at 10Gb/s.
10 Gigabit Ethernet
Today’s FPGAs are capable of
3.125 Gb/s LVDS inter-faces. Standards Experience Other experience
Where an XFP packaging Plextek staff have actively Plextek has a successful track
approach is used, it is necessary attended ETSI, ATM and record of product development
to track 10Gb/s over the PCB. IEEE802 LAN/MAN standards in the communications market.
Plextek are familiar with such committees and specifically take Our ‘Whole System’ approach
techniques, including analog part in IEEE Standards to product development can
equalisation at this rate. Association sponsor ballots for involve any of the following
the release of the latest activities.
EFM uses many techniques standards, for example 802.3,
which are familiar to Plextek 802.11, 802.12 and 802.16. • Product concept and
from earlier 1000 Base-X work. system specification
Plextek is also familiar with the Bespoke Systems
• Hardware and software
DSL approach for a copper
solution. Much of Plextek’s work has design and integration
traditionally also come from
Plextek Capabilities • Industrial design,
clients who want a custom non-
mechanical and casework
standards approach to solving a
Plextek design services cover layout
problem. Plextek works with
the full life cycle of product clients who need to interface to • Type approvals testing
development from initial radical new devices or who • Introduction into volume
strategic studies through to require an innovative approach manufacture
design for manufacture. to complexity reduction.
Specific capabilities include: • Development of factory test
Optoelectronics systems
• System Design
• PHY level Please see the separate Plextek
power budget information sheet on ‘Optical
jitter budget Communications’ which covers
dispersion budget
• Component Selection • Transceivers
For further information, please contact
the Marketing Department:
• Detailed Design • CDR (clock and data Telephone: +44 (0)1799 533200
• Standards Advice recovery) Email: mktg@plextek.co.uk
• Design for Manufacture • EDFA control
• Laser wavelength tuning
• Integration techniques
