October 10th 2004 ANW Moldova

NREN on dark fibre with CWDM -

experience of S&M

Zoran Jovanović, Belgrade University Computer Centre –

RCUB

Deregulation

Telekom Srbija – monopoly until June 2005

Telekom Srbija is (almost) the only owner of intercity fibers

Telekom Srbija does not lease dark fiber Expensive high capacity digital links New owners are appearing: Power

company, Oil company, Railway, … Cable TV operators in towns

SinSEE Project: Donation of German ministry for science and technology in active networking equipment.

Fiber lines established: RCUB-Rectors office

(5km) RCUB-Novi Sad

(95 km – 23dB attenuation)

RCUB-Vinca (15km) All lines installed and

working

C R OAT IA

46 °

19 °

22°

45 °

44 °

43 °

42 °

20 ° 21 °

43 °

44 °

45 °

21°

20 °19 °18 ° 23 °

42 °

0

0

60 k m

40 m i

20

20

40

S a ra je vo

H U N G A R Y

R O M A N I A

A L B A N I A

B U LG A R I A

S ko pje

M O N T E N E G R O

C R O A T I A

B O S NI A A N D

HE R Z EG O VI N A

N ovi S a d

B or

Les ko vac

P iro t

K ra lje vo

U žic e

K ru še va c

C a c ak

P ancev o

O sije k

S om b or

Š abac

Zren jan in

N iš

B e og ra d

Val jev o

Vranje

Novi Pazar

S ub ot ica

K ra gu jev a c

Year 2002

Awareness – ceremony with PM

Intercity dark fiber was given only for testing GBIC ZX were for Vinca institute – used for

intercity connection Video conferencing of the minister with other

university centers Service at the operator didn’t exist – pricing? Strategic approach – to include the new optical

infrastructure that is appearing

Year 2003 – Signed

C R OAT IA

46 °

19 °

22°

45 °

44 °

43 °

42 °

20 ° 21 °

43 °

44 °

45 °

21°

20 °19 °18 ° 23 °

42 °

0

0

60 k m

40 m i

20

20

40

S a ra je vo

H U N G A R Y

R O M A N I A

A L B A N I A

B U LG A R I A

S ko pje

M O N T E N E G R O

C R O A T I A

B O S NI A A N D

HE R Z EG O VI N A

N ovi S a d

B or

Les ko vac

P iro t

K ra lje vo

U žic e

K ru še va c

C a c ak

P ancev o

O sije k

S om b or

Š abac

Zren jan in

N iš

B e og ra d

Val jev o

Vranje

Novi Pazar

S ub ot ica

K ra gu jev a c

Contract with Telekom Srbija – Q3 of 2003 Novi Sad – Subotica (130

km) Beograd – Kragujevac

(130 km) Beograd – Niš – Gigabit

Ethernet over SDH (250 km)

Lines are now being finally tested

8 locations in Belgrade 3 locations in Novi Sad 2 locations in Kragujevac 4 locations in Niš

Key problems in implementation

Getting building permissions for dark fiber layout to the university, high school or institute buildings

Winter without digging Testing by the operator The only customer with this service Buildings of the operator should be avoided for

telehousing by laying out a optical cable to the nearest school or institute – example Belgrade - Kragujevac

Year 2004 - signed

C R O A T IA

46°

19°

22°

45°

44°

43°

42°

20° 21°

43°

44°

45°

21°

20°19°18° 23°

42°

0

0

60 km

40 m i

20

20

40

S a ra je v o

H U N G A R Y

R O M A N I A

A L B A N I A

B U L G A R IA

S k o p je

M O N T E N E G R O

C R O A T I A

B O S N IA A N D H E R Z E G O V IN A

N o v i S a d

B o r

Leskovac

P iro t

K ra lje v oU ž ic e

K ru še v a c

C a c a k

Pancevo

O s ije k

Som bor

Šabac

Zren jan in

N iš

B e o g ra d

Valjevo

Vran je

N ovi Pazar

Subo tica

K ra g u je v a c

Annex of the contract with Telekom Srbija

Phase 1: Subotica – Szeged! (40

km) - SEEREN Phase 2:

Novi Sad – Zrenjanin Beograd – Šabac (90 km) Beograd – Valjevo (90km) Valjevo – Užice (89 km) Užice – Čačak (58 km) Čačak – Kraljevo (33 km) Kraljevo – Kruševac (83

km) Kruševac – Niš (84 km) 3 locations in Belgrade

Year 2004 - Signed

C R O A T IA

46°

19°

22°

45°

44°

43°

42°

20° 21°

43°

44°

45°

21°

20°19°18° 23°

42°

0

0

60 km

40 m i

20

20

40

S a ra je v o

H U N G A R Y

R O M A N I A

A L B A N I A

B U L G A R IA

S k o p je

M O N T E N E G R O

C R O A T I A

B O S N IA A N D H E R Z E G O V IN A

N o v i S a d

B o r

Leskovac

P iro t

K ra lje v oU ž ic e

K ru še v a c

C a c a k

Pancevo

O s ije k

Som bor

Šabac

Zren jan in

N iš

B e o g ra d

Valjevo

Vran je

N ovi Pazar

Subo tica

K ra g u je v a c

Annex of the contract with Telekom Srbija

Phase 3: Beograd - Pančevo (20

km) Kraljevo – Novi Pazar (91

km) Niš – Pirot (71 km) Niš – Leskovac (46 km) Leskovac – Vranje (68 km) Niš – Bor (130 km) Novi Sad – Sombor (72

km) 7 new locations in

Belgrade

EuroPACS 2004

UChHIS and Telemedicine

NREN of NREN of SerbiaSerbia andandMontenegroMontenegro

Kraljevo

BEOGRAD

Kragujevac

NIŠ

NOVI SADLocal ISPTelekom

Srbija

Podgorica

Subotica

Bor

LeskovacNovi Pazar

Šabac

Sombor

Užice

Valjevo

Čačak

Kruševac

Pančevo

Zrenjanin

Athens/GrNetSEEREN/GEANT

Pirot

Vranje

Szeged/HungarnetSEEREN/GEANT

Nodes:

National NOC

Core Nodes

Gbps nodes

International:

1Gbps/100Mbps

34 Mbps

Internal:

2*1 Gbps Ethernet

1 Gbps Ethernet

1 Gbps Eth/SDH

2 Mbps

V. Plana

Locations in Belgrade

University hospitals on the NREN

GE MAN that will connect most advanced hospitals in Belgrade

In Serbia, all medical faculties will have a 1Gbps connection

More than 30 buildings of the campus of the Medical faculty and Dentistry faculty in Belgrade will have 1Gps connections by the end of 2004 – Medical campus – laying cables along the heating pipes

Equipment and technologies

Gigabit EthernetLow cost interfacesUse of low cost L2 or L3 switchesSufficient at the moment in Serbian NRENUse of CWDMPlanning to use of optical amplifiers

CWDM test – July/August 2003 Cisco CWDM test kit Replaced 1000BaseZX Belgrade – Novi Sad (95 km – 23dB att.) 4 Gbps Etherchannel

BGCisco6509

NSCisco 3550

1470 nm, 1510 nm, 1550 nm, 1590 nm

CWDMMUX-4

CWDMMUX-4

Total attenuation

Avg/Max add loss

[dB]

Avg/Max drop loss

[dB]

Avg/Max pass loss

[dB]

Single channel OADM 1.2/1.9 1.6/2.3 1.5/2.0

Four channel OADM 3.0/4.0 4.0/5.0 2.0/2.6

Eight channel Mux/Dem 3.0/4.0 4.0/5.0 -

Telekom Srbija has G.652 fibers Total attenuation approx: 23dB+3dB+4dB = 30dB CWDM 1000BaseZX optical budget: 30dB Problems expected on 1470 nm 45 days without any carrier transition

Wavelength (nm)

Fibe

r Atte

nuat

ion

(dB

/km

)

1250 1300 1350 1400 1450 1500 1550 1600

1.2

0.9

0.6

0.3

0.0

O-Band

E-Band

S-Band

C-Band

L-Band

CWDM experiment conclusions

Can be used on intercity lines for up to 100km

Reliable solution, Low cost solution Easy bandwidth upgrade Great flexibility for different logical

topologies

CWDM Problems Optical amplification:

EDFA cover narrow wavelength range (typically C-Band or L-Band). In CWDM will be used for a single lambda, when a lambda is dropped, amplified and added.

LOA – Cover broader wavelength range. At the moment of our analysis were available only as product evaluation kits. Noisy, low amplification, narrow bandwith.

Experimental OA for the whole range - Japan

Our solution

Majority intercity links are shorter then 100km – daisy-chained

If needed - OEO conversion using L3 switches Replacing the OEO conversion with EDFA OA to

reduce RTT Drawbacks – in totally Ethernet network –

relatively slow convergence, added delay Idea: Justify the use of dark fiber through fast

and cheap connection provisioning. Later find the best solution for the network

Potential Belgrade – Novi Sad – Subotica - Hungary connection

CIS

CO

SY

ST

EM

S

CISCOSYSTEMS

CIS

CO

SY

ST

EM

S

BG

NS

Cisco 6509

Cisco 6509

CISCOSYSTEMSCisco 3550

BG-HU

SU

OADM 4

1470

nm

1550nm

1590nm

1550nm

OADM 4

OADM 4

1510

nm

1550

nm

1590

nm

1510nm

1470nm

1590

nm

1510nm1550nm

1550

nm

1510

nm

1590

nmOADM 4

BG-NS

BG-HU

BG-SU

NS-SU

NS

-SU

BG

-SU

BG

-NS

BG

-HU

BG

-SU

BG

-NS

Cisco 3550

HU

SU

NS

BG

1Gbps

2Gbps

1Gbps 1Gbps

Strategy

Using CWDM until there is a request for higher bandwidth

Try to establish our own intercity optical infrastructure North – South backbone with G.655 cables – combining with e-government

Use fiber of other dark fiber suppliers – fault tolerance

Establish DWDM if we don’t get our own fiber Establish a SEE backbone for NRENs

Conclusion

Widespread use of inter- and intra-city dark fiber is the main direction in which Serbian NREN is moving

Cross-border dark fiber connections in SEE region are the next step for inter-NREN connections

CWDM with 1 GE is a reliable technology which the Serbian NREN will most probably use in the near future

October 10th 2004 ANW Moldova

Thank you for your attention

Questions