Joseph Ho

May 17, 2004

National Security BureauAdvantages of DWDM over SDH

Proprietary & ConfidentialProprietary & Confidential

Content

• Metro Network Trends

• Driver for DWDM

• Simplicity – One Network

• Case Study : National Security Bureau Network

Proprietary & ConfidentialProprietary & Confidential

Other...

FDDIFDDI

ESCONESCON

FibreFibreChannel (1/2G)Channel (1/2G)

VideoVideo

HDTVHDTV

ESCONESCONFibre- Fibre- ChannelChannel

MainframeMainframe

STM-1STM-1D1D1HDTVHDTV

HQ VideoHQ Video

IP

STM-4STM-4

STM-16STM-16Gigabit Gigabit EthernetEthernet

Fast Fast EthernetEthernet

DS3DS3

STM-1STM-1STM-1STM-1STM-4STM-4STM-16STM-16G EthG EthF EthF Eth

Routers/IPswitchRouters/IPswitch

Metro Networks TrendsH

igh

er S

ervi

ce R

ates

Hig

her

Ser

vice

Rat

es

Growing Range of ServicesGrowing Range of Services

2.5 G2.5 G

1 G1 G

622 M622 M

155 M155 M

100 M100 M

45 M45 M

1.5 M1.5 M

ServiceService

ATM

STM-1STM-1

STM-4STM-4

DS3DS3

ATM SwitchesATM Switches

STM-1STM-1STM-4STM-4STM-16STM-16

TechnologyTechnology

Application Space GrowingApplication Space GrowingOptical Interfaces Across Diverse Group of Equipment.Optical Interfaces Across Diverse Group of Equipment.

NO LONGER JUST SDH!NO LONGER JUST SDH!

Cross ConnectsCross Connects

STM-1STM-1STM-4STM-4STM-16STM-16

STM-1STM-1STM-4STM-4STM-16STM-16STM-64STM-64

SDHSDH

TDM

DS3DS3

DS1DS1

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Extends the Capacity of Existing Fiber (32 Times)

Universal Optical InterfacesUniversal Optical Interfaces

Accommodates Any Input Rate Between 16 Mbps and 10 Gbps

Permits Carriage of Any Protocol Known Today or in the Future

Scaleable DesignScaleable Design

Cost Scales Linearly With Capacity

Forecast-TolerantForecast-TolerantArchitectureArchitecture

Quickly Adapts to Unforeseen Demand and Changing Interfaces

D1ESCON

FDDIGbe

Drivers for DWDM

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Simplicity : One Network for NSB

SDHSDH

IP IP

Mainframe Networking

Mainframe Networking

VideoVideo

Traditional ApproachTraditional Approach

•Special Assemblies•Network Overlays

DWDM DWDM Optical NetworkOptical Network

D1 Video

Gigabit Ethernet

ESCON

SDHSTM-1/4/16

Fibre Channel

FICON

Async

Wavelength Networking Wavelength Networking

•Ubiquitous Networking•Forecast Tolerant

One Network = Simplicity & Reduced Operations Costs

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Case Study – National Security Bureau

• DWDM vs. SDH Comparison – traffic scale up

• 4 Node Ring

• Examine the Shelf Layout and Equipment at Site A as traffic is increased from Day 1 to Day 2 to Day 3

• Note : Incremental hardware is shown in RED

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National Security Bureau RingDWDM Expansion

Site A Site B

Site C

Site D

Take a look at the shelf at Site A when traffic is expanded

(assume traffic is from Site A to Site C only)

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Day 1 : 2xGbE

OCM

A

OCM

B

(Band 1) 4 Channel OMX West (Band 1) 4 Channel OMX East

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20Slot2.

5G F

lex

OC

LD

B1C

12.

5G F

lex

OC

LD

B1C

1

Fill

er

Car

dF

iller

C

ard

2:1

GF

SR

M

Car

dF

iller

C

ard

Fill

er

Car

dF

iller

C

ard

Fill

er

Car

d

Fill

er

Car

d

Fill

er

Car

dF

iller

C

ard

Fill

er

Car

d

Fill

er

Car

dF

iller

C

ard

Fill

er C

ard

S PF

iller

C

ard

Total Traffic : 2 Gbs

Shelf at Site A

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Day 2 : 4xGbE, 2xFC (1G)

OCM

A

OCM

B

(Band 1) 4 Channel OMX West (Band 1) 4 Channel OMX East

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20Slot2.

5G F

lex

OC

LD

B1C

12.

5G F

lex

OC

LD

B1C

1

2.5G

Fle

x O

CLD

B1C

2

2.5G

Fle

x O

CLD

B1C

2

2:1

GF

SR

M

Car

d2:

1 G

F S

RM

C

ard

2:1

GF

SR

M

Car

dF

iller

C

ard

2.5G

Fle

x O

CLD

B1C

3

Fill

er

Car

d

2.5G

Fle

x O

CLD

B1C

3

Fill

er C

ard

File

r C

ard

Fill

er

Car

dF

iller

C

ard

Fill

er C

ard

S PF

iller

C

ard

Total Traffic : 6 Gbs

Shelf at Site A

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Day 3 : 4xGbE, 2xFC (1G), 4xSTM1, 2xFC (2G)

OCM

A

OCM

B

(Band 1) 4 Channel OMX West (Band 1) 4 Channel OMX East

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20Slot2.

5G F

lex

OC

LD

B1C

12.

5G F

lex

OC

LD

B1C

1

2.5G

Fle

x O

CLD

B1C

2

2.5G

Fle

x O

CLD

B1C

2

2:1

GF

SR

M

Car

d2:

1 G

F S

RM

C

ard

2:1

GF

SR

M

Car

d4:

1 S

RM

C

ard

2.5G

Fle

x O

CLD

B1C

3

2.5G

Fle

x O

TR

B

2C1

2.5G

Fle

x O

CLD

B1C

3

2.5G

Fle

x O

CLD

B1C

4

2.5G

Fle

x O

CLD

B

1C4

2.5G

Fle

x O

TR

B

2C1

2.5G

Fle

x O

TR

B

2C2

2.5G

Fle

x O

TR

B2C

2

S PF

iller

C

ard

(Band 1) 4 Channel OMX West (Band 1) 4 Channel OMX West

Total Traffic : 10.6 GbsShelf at Site A

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National Security Bureau RingSDH Expansion

Site A Site B

Site C

Site D

Take a look at the shelf at Site A when traffic is expanded

(assume traffic is from Site A to Site C only)

Proprietary & ConfidentialProprietary & Confidential

Day One : 2xGbE

2.5G

Lin

e C

ard

2.5G

Lin

e C

ard

Dua

l G

bE C

ard

Com

mun

icat

ion

Car

d

Total Traffic : 2Gbs

Shelf at Site A

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Day Two : 4xGbE, 2xFC (1G)

10G

Lin

e C

ard

10G

Lin

e C

ard

Dua

l GbE

Car

d

Com

mun

icat

ion

Car

d

Replace Line Card at ALL site

Dua

l FC

(1G

) C

ard

Dua

l GbE

Car

d

Total Traffic : 6GbsShelf at Site A

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Day Two : 4xGbE, 2xFC (1G), 4xSTM1, 2xFC (2G)

Total Traffic : 10.6Gbs Shelf at Site A

Com

mun

icat

ion

Car

d

10G

Lin

e C

ard

10G

Lin

e C

ard

Qua

d po

rt S

TM

1 C

ard

2.5G

Lin

e C

ard

2.5G

Lin

e C

ard

DWDM Filter DWDM Filter

Com

mun

icat

ion

Car

d

Dua

l Por

t GbE

Dua

l Por

t GbE

Dua

l Por

t FC

(1G

)

FC

(2G

) C

ard

FC

(2G

) C

ard

In order to achieve this traffic, DWDM filters and an additionalShelf is required at ALL sites.

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Conclusion

• When National Security Bureau increases to higher bandwidth (FC-1G, FC-2G, GbE) or has a mix of different types of traffic, the DWDM solution scales efficiently and at a significantly lesser cost than a SDH solution.

• SDH needs to reserve half the bandwidth for protection

• Forecast Tolerant : as NSB grows their network, the Metro DWDM solution will support all major and standard Optical signals.

• Scalability is simple – insert the blade into the shelf.