LambdaDriver™ family

Wave Division Multiplexing

• Bandwidth doubling every 6-9 months

• Traffic nature more complex: TDM,ATM,FR,IP data, VoIP&Video

• Rapid grow in SAN and distributed processing

MAN Bandwidth Demand

Source: CIBC World Markets, June 2001Source: CIBC World Markets, June 2001

Enterprise WAN Bandwidth migration

Options for increasing throughput

1. Increase the Speed Limit:

Now 2001 2003?

1Gbps ->2.5Gbps ->10Gbps -> 40Gbps(OC768) -> 160Gbps

2. More wavelengths on the fiber:

1990 2001

1->2->4->16->32->160 --->?

3. Widen the band windows (widen the road)

Optical Transmission Bands

Bands:Short 1470-1530nmConventional 1530-1570nmLong 1570-1610nm

Bands:Short 1470-1530nmConventional 1530-1570nmLong 1570-1610nm

Multiplexing techniques

Electrical Signal Inputs

Electrical Signal Inputs

Electrical Signal Inputs

Electrical Signal Inputs

TDM TDM

SMUXSMUX

WDMWDMOptical or

ElectricalSignal

Optical orElectricalSignal

Tributaries are sent in specific time slotsTributaries are sent in specific time slots

Tributaries are sent when capacity is availableTributaries are sent when capacity is available

Tributaries are sent on different wavelengthsTributaries are sent on different wavelengths

WDM Market size

WDM principle

Multiple wavelengths transmission over single fiber

Multiple wavelengths transmission over single fiber

Input channelsInput channels Output channelsOutput channels

Ch#1Ch#1

Ch#nCh#n

Ch#1Ch#1

Ch#nCh#n

λ1 - λn λ1 - λnMuxMux DeMux

DeMux

DWDM versus CWDM

Frequency (THz)

Wavelength(nm)

196.1 1528.77

196.0 1529.55

195.9 1530.33

192.0 1561.42

191.9 1562.23

191.8 1563.05

191.7 1563.86

ITU Grid Standard(G692)ITU Grid Standard(G692)

How close can they(’s be?

• Current filters can discriminate to around 25Ghz

• Min. Spacing = Max. Bit Rate x 2.5

Max Bit Rate Min Spacing

10Gbps 25Ghz

40Gbps 100Ghz

WDM versus TDM

Function WDM SDH/SONET

Scalability Just light on new wavelength Costly and inefficient upgrade

Provisioning Within days Months

Protocol/Bit rate transparency Yes No

Bandwidth limits Potentially unlimited – 2Tbps? 40Gbps?

Access interface Direct wavelength mapping OEO conversion before multiplexing

DWDM eliminates Regenerators

OC48OC48

RPTRRPTR40Km

40Km40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

OC48OC48

OC48OC48

RPTRRPTR40Km

40Km40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR40Km

40Km40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR40Km

40Km40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

RPTRRPTR 40Km

40Km

OC48OC48

OC48OC48

OC48OC48

OC48OC48

OC48OC48

120Km120Km

120Km120Km

4 x OC484 x OC484 x OC48

4 x OC48

DWDM Transmission – 10GbpsDWDM Transmission – 10Gbps

TDM Transmission – 10GbpsTDM Transmission – 10Gbps

OAOA OA

OA

SONET with WDM

• Existing SONET equipment investments can be preserved by using WDM as transport layer

• SONET multiplexing equipment can be eliminated by direct connection to OC48 interfaces

SONETSONET

ATMSwitch

ATMSwitch

RouterRouter

OC-nOC-n

OC48OC48

OC48OC48

FiberFiberWDM

WDM

3 options for upgrading SONET ring:

1. Replace equipment, like OC48 to OC192

2. Install a new ring on new or existing dark fiber

3. Install one or more new rings by deploying WDM over existing fiber.

May be the most important application in the near term!

Upgrading SONET/SDH

Migration steps from SONET/SDH to WDM

11

22

33

Exchanging SONETADM’s with OADM’s

Exchanging SONETADM’s with OADM’s

Direct interfacingWith edge equipment

Direct interfacingWith edge equipment

LambdaDriverTM structure

Transponder 1Transponder 1

Transponder 16Transponder 16

Mux

Demux

Mux

Demux

AccessChannels at “gray” wavelengths

AccessChannels at “gray” wavelengths

DualFiberLink

DualFiberLink

λ1 – λ16 λ1 – λ16

Ch#1Ch#1

Ch#16Ch#16

λ1 λ1

λ16 λ16

λ2

λ15

λ2

λ15

λ2

λ15

λ2

λ15

λ16λ16

λ1λ1

Transponders

• Converts the access(gray) wavelength to WDM specific wavelength(and vice versa).

• Performs 3R (reshape,retime,retransmit) function

• Hot swappable, undependable modules

Multiplexer/Demultiplexer

Passive units which combine (Multiplex) number of incoming fibers into one fiber and splits (DeMultiplex) one fiber into number of outgoing fibers.

DemultiplexedWavelengths

DemultiplexedWavelengths

Multi-wavelengthsignal

Multi-wavelengthsignal

DemultiplexedWavelength

DemultiplexedWavelength

DeMuxDeMux

Optical Add/Drop Multiplexing

• When building a Ring topology only part of the wavelengths need to be dropped/added at every node.

• OADM’s – “pass through” without substantial attenuation all the channels that are not dropped at that location.

“dropped”wavelength

“dropped”wavelength

“added”wavelength

“added”wavelength

OADMOADM

“dropped”wavelength

“dropped”wavelength

“added”wavelength

“added”wavelength

OADMOADM

1+1 Protection

Provides automatic optical protection for the link

MUXMUX DeMUXDeMUXPrimary linkPrimary link

Secondary linkSecondary link

• This is an optional module, used for long(more than 50Km) distances. No OEO conversion!

• Could be placed after MUX(post), before DeMUX(pre) or between sites (in line).

• Currently available only for DWDM wavelengths range

Optical Amplifier

Site ASite A Site BSite B

Post OAPost OA

Post OAPost OA Line OALine OA Pre OAPre OA

MUXMUX DeMUXDeMUX

EDFA - Erbium-doped fiber amplifier – amplifies light in the

1540 nm window.

EDFA Principle

LambdaDriver™ Management

• Provides configuration and link fault monitoring

• Runs the management tasks and interfaces external managers by means of SNMP, Telnet and CLI. Redundant CPU – optional.

• OSC (Optical Service Channel) – allows management of the

remote unit using separate wavelength (1310nm). • Service module – responsible for combining/splitting the OSC

with the WDM trunk

Access Protocols

• Potentially any protocol with rates from 100Mbps up to 10Gbps…

• LambdaDriver™ family currently supports:

Fast Ethernet, Gigabit Ethernet, Fiber Channel,

OC3, OC12 and OC192 protocols …

• Other rates are possible per request.

• Rate Adaptive Transponders are available.

LambdaDriver™ Family

LambdaDriver 1600 front view

LambdaDriver 1600 front view

LD1600 – 16 slot modular chassis for up to 16 DWDM channelsLD1600 – 16 slot modular chassis for up to 16 DWDM channels

LambdaDriver™ Family

TranspondersTransponders

Mux/DeMuxMux/DeMux

PowerSupplies

PowerSupplies

• LD800 – 8 slot modular chassis for up to 8 DWDM/CWDM channels, OADM and media converters managed hub.

• Targeted for lower bandwidth and cost applications.

• Will host the same type of transponders as in the LD1600 box.

• Will host either 8 channel DWDM, 4 channel CWDM or OADM cards

Lambda Driver™ Family

•LD10x – Stand alone units for media conversion and

2 wavelength single fiber operation.•Currently available the following products:

FE copper to fiber (Multimode&Singlemode)

converters with dual and single fiber operation.

•LD10x – Stand alone units for media conversion and

2 wavelength single fiber operation.•Currently available the following products:

FE copper to fiber (Multimode&Singlemode)

converters with dual and single fiber operation.

Network Topologies

Point-To-Point connection between two sites

Point-To-Point connection between two sites

Network Topologies

Ring topology implemented by loop backs

Network Topologies

Master SiteMaster SiteSlave Site BSlave Site B

OADMOADMMux/DeMuxMux/DeMux OADMOADM

Slave Site ASlave Site A

Dropping ch#1Dropping ch#1

Adding ch#1Adding ch#1Dropping ch#5Dropping ch#5

Adding ch#5Adding ch#5

Ring TrafficInput

Ring TrafficInput

Ring Traffic Output

Ring Traffic Output

Ring TrunkRing TrunkRing TrunkRing Trunk

Ring topology implemented by OADM’sRing topology implemented by OADM’s

Single fiber operation

Switches/Routers with WDMwavelength uplinks

LD1600LD1600

Mux/DeMuxMux/DeMux

Access switchesAccess switches

WDM TrunkWDM Trunk

TransponderTransponderTransponderTransponder

TransponderTransponder

LD1600LD1600

Mux/DeMuxMux/DeMux

Access switchesAccess switches

WDM TrunkWDM Trunk

WDM WavelengthWDM Wavelength

WDM WavelengthWDM WavelengthWDM Wavelength

WDM Wavelength

Transponders elimination by using WDM wavelengths on switches

Transponders elimination by using WDM wavelengths on switches

Advantage in using switches with WDM Add/Drop uplinks

Dropping ch#1Dropping ch#1

OADMOADM

Add/Drop Site Add/Drop Site

Adding ch#1Adding ch#1

Ring TrunkRing TrunkRing TrunkRing Trunk

SwitchSwitch

Ring TrunkRing TrunkAdd/Drop Site Add/Drop Site

Ring TrunkRing Trunk

SwitchSwitch

Cost and spacesavings

Cost and spacesavings

Building a Ring with WDM oriented switches

Switches with WDMAdd/Drop uplinks

Switches with WDMAdd/Drop uplinks

LD1600LD1600

Switch with WDMWavelength uplinks

Switch with WDMWavelength uplinks

Road map

Q3: • LD1600, LD800 – betha testing• LD10x – first customer shipmentQ4:• OADM for DWDM & CWDM betha testing• OADM uplinks for Optiswitch switches• WDM Gigabit uplink for Optiswitch switches• LD10x – managed solutions

Q1/2002:• Sub Rate multiplexer - Low rate protocols(like ESCON )

are TDM multiplexed for maximum utilization of the available wavelength

Road map

LowSpeedProtocols

LowSpeedProtocols

ITU wavelengthITU wavelength

Sub-rate MUXSub-rate MUX

AND…

2002 year developments

Going Wireless!Going Wireless!

Summary of LambdaDriver™ Main features

• Modular design, allows for lower initial costs and future upgrades• Choice of DWDM(up to 16 channels) or CWDM(up to 8 channels)

technologies.• Access protocols flexibility – allows for mixing of different speeds

and protocols.• Transponders with software controllable access rate.• Redundant P.S. and CPU’s • 1+1 Redundancy on the trunk - optional• Integrated Optical Add/Drop ability • Integrated Optical Amplifier(EDFA) as an option – for longer

distances transmission