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Design and Dimensioning Aspects of 27

TRANSNET FREIGHT RAIL

DESIGN PRINCIPLES AND DIMENSIONING ASPECTS OF DWDM

PROJECT

TITLE:

Backbone DWDM Network Deployment

Date: September 2017


DESIGN PRINCIPLES AND DIMENSIONING ASPECTS OF THE DWDM NETWORK

1. Design Principles

This document must be used with the “Technical Specification for Optical Transport

Network (DWDM) Equipment”, document number BBG7410, and any other

documentation relevant to this specification. This document provides the guide and the

principles that must be used in order to achieve a properly engineered DWDM Network.

In cases where there are discrepancies between this document and specification

document BBG7410, it is important to note that specification BBG7410 takes precedence.

The network will be implemented using the existing G.652 and G.655 cable with the

parameters listed below:

G.652 Parameters

Attenuation @ 1310nm 0.35 dB


Dispersion @ 1310nm 3 ps/nm.km


Fibre Margin 10%

Typical Splice Distance 4 km

Splice Loss per splice 0.05 dB

Connector Loss 0.5 dB

PMD ≤0.06 ps / √𝑘𝑚


G.655 Parameters



Fibre Margin 10%

Typical Splice Distance 4 km

Splice Loss per splice 0.05 dB

Connector Loss 0.5 dB

PMD ≤0.1 ps / √𝑘𝑚

Unless stated, all interfaces on the DWDM system must be optical.


2. Topologies and Network Dimensioning

2.1. Ring 1 Topology with Distances

34km

104km

78km

Sentra Rand

Germiston

Union

Heidelberg

Balfour NorthStandertonVooruitsig

13km

80km80kmNewcastleGlencoeLadysmithEstcourt

Mooirivier

Pietermariburg

Bayhead

Durban

NseziEmpangeni

Stanger

Isando

Ulundi

Vryheid Piet Ritief

Ermelo

Geluksplaas

Ogies

71km57km67km67km

86km

35km 68km8km

111km

110km

99km

32km

59km

13km

Mthunzini

BBI

Pretoria

11km

Esselenpark

72km

9km

105km

88km

42km

94km

94km

Pretoria North

14km

15km

60km

Teraco

4km

15km

57kmBrits

Rustenburg

57km

Bronkhorstpruit

75km

75km

Mthunzini

Telkom1Km

TM1 (Island View)

PS1 (Twini)PS3 (Hilltop)

PS5 (Mnambithi) PS7 (Warden) PS8(Villiers)

TM2 (Jameson Park)

88Km

105Km

25Km

85Km150Km 110Km

Swartraggens

61km

2Km

Koedoespoort

Alrode

Langlaagte

40km

29Km

Johannesburg

9Km

NOC (Pinetown)

24Km

23Km

Durban Teraco

24Km

11Km

Greenview

35Km

15Km

16Km

Figure 1: Ring 1 Topology Note: See notes at the end of the document for explanation of dotted lines


2.2. Ring 1 Network Dimensioning

Line Configuration Client Configuration

Node ROADM

Subsystem

Number of Directions (Degrees)

10Gb/s Muxponder

Line Speed Per Direction

10GE 1GE FE STM-64 STM-16 STM-4 STM-1

Isando Yes 4 100Gb/s 6 4 4 4 4 2 6

Esselen Park Yes 2 100Gb/s 4 4 4 4 4 2 6

Pretoria Yes 3 100Gb/s 4 4 4 2 2 2 6

Pretoria North Yes 4 100Gb/s 7 4 4 3 3 2 6

Greenview Yes 2 100Gb/s 4 4 4 2 2 2 6

Koedoespoort Yes 2 100Gb/s 4 6 6 2 2 2 4

Brits No 2 Yes 100Gb/s 0 0 4 0 0 0 4

Rustenburg Yes 2 100Gb/s 2 2 2 1 2 2 4

Swartruggens Yes 4 100Gb/s 4 4 4 1 0 0 2

Bronkhorstspruit Yes 4 100Gb/s 2 2 4 2 1 1 4

Sentra Rand Yes 3 100Gb/s 6 6 6 4 4 2 6

Ogies Yes 3 100Gb/s 0 4 4 0 0 0 2

Gelukplaas Yes 2 100Gb/s 4 0 4 0 0 0 4

Ermelo Yes 3 100Gb/s 4 4 4 4 4 2 6

Piet Retief Yes 2 100Gb/s 0 0 4 0 0 0 4

Vryheid Yes 3 100Gb/s 4 4 4 4 4 2 6

Ulundi Yes 2 100Gb/s 0 0 4 0 0 0 4

Ntsezi Yes 3 100Gb/s 6 6 6 4 4 2 6

Empangeni Yes 2 100Gb/s 6 6 6 4 4 2 6

Mthunzini BBI Yes 4 100Gb/s 6 4 4 6 6 4 4

Mthunzini

Telkom Yes 2 100Gb/s 6 4 4 6 6 4 4


Stanger Yes 2 100Gb/s 0 0 4 0 0 0 4

Durban Yes 4 100Gb/s 6 6 6 6 6 4 6

Durban Teraco Yes 2 100Gb/s 4 4 4 4 4 2 6

Bayhead Yes 3 100Gb/s 4 4 4 4 4 2 6

Pietermartizburg Yes 2 100Gb/s 4 4 4 4 4 2 6

Mooi River Yes 2 100Gb/s 0 0 4 0 0 0 4

Estcourt Yes 2 100Gb/s 0 0 4 0 0 0 4

Ladysmith Yes 2 100Gb/s 4 4 4 4 4 2 6

Glencoe Yes 3 100Gb/s 4 4 4 4 4 2 6

New Castle Yes 2 100Gb/s 4 4 4 4 4 2 6

Vooruitsig Yes 2 100Gb/s 0 0 4 0 0 0 4

Standerton Yes 2 100Gb/s 5 4 4 4 4 2 6

Balfour North No 2 Yes 100Gb/s 0 0 4 0 0 0 4

Heidelberg Yes 2 100Gb/s 5 4 4 4 4 2 6

Union Yes 3 100Gb/s 4 4 4 4 4 2 6

Germiston Yes 5 100Gb/s 6 6 6 6 4 2 6

Johannesburg Yes 4 100Gb/s 4 4 4 4 4 2 6

Teraco Isando Yes 2 100Gb/s 4 4 4 4 4 2 4


Ring 2 A Topology with Distances

90km

100km

49km

45km

62km

55km

60km

Petrusburg

81km

Kimberley

Bloemfontein

Koppies

Hennenman KroonstadBrandfort Theunissen44km57km

RandfonteinOberholzerPotchefstroomKlerksdorpLeuudoringstad

Bloemhof

Christiana

Warrenton

Johannesburg

Germiston

Union

Vereeniging

Sasolburg

23km

13km

16km

67km 41km

94km

47km

74km

41km

41km

55km

53km

Bethlehem

135km

Magaliesburg

34Km

Derby54Km Swartruggens52Km Zeerust70Km

Lobatse

63Km

Tambo

Springs

26Km

46Km

Sivewright

Building

3Km

16Km

RING 2a

Figure 2: Ring 2A Topology Note: See notes at the end of the document for explanation of dotted lines


2.3. Ring 2A Network Dimensioning


Node ROADM

Subsystem


10Gb/s Muxponder



Randfontein No 3 Yes 100Gb/s 0 0 4 0 0 0 8

Oberholzer Yes 2 100Gb/s 0 0 4 0 0 0 8

Potchefstroom Yes 3 100Gb/s 4 4 4 4 4 2 12

Klerksdorp Yes 2 100Gb/s 4 4 4 4 2 2 12

Leeudoringstad Yes 2 100Gb/s 0 0 4 0 0 0 8

Bloemhof Yes 2 100Gb/s 1 0 4 0 0 0 8

Christiana No 2 Yes 100Gb/s 0 0 4 0 0 0 8

Warrenton Yes 3 100Gb/s 2 0 4 0 0 0 8

Kimberley Yes 4 100Gb/s 4 4 4 4 4 2 12

Petrusburg Yes 2 100Gb/s 0 0 4 0 0 0 8

Bloemfontein Yes 3 100Gb/s 4 4 4 4 4 2 12

Brandford Yes 2 100Gb/s 0 0 4 0 0 0 8

Theunissen Yes 2 100Gb/s 0 0 4 0 0 0 8

Henneman Yes 2 100Gb/s 0 0 4 0 0 0 8

Kroonstad Yes 2 100Gb/s 6 4 4 4 4 2 12

Bethlehem N/A N/A Yes 10Gb/s 0 4 4 0 2 0 12


Koppies No 2 Yes 100Gb/s 0 0 4 0 0 0 8

Sasolburg Yes 2 100Gb/s 1 0 4 0 0 0 12

Vereeniging Yes 4 100Gb/s 5 4 4 4 4 2 12

Tambo Springs Yes 2 100Gb/s 4 4 4 4 4 2 12

141 Sivewright Yes 2 100Gb/s 6 6 6 0 0 0 0


2.4. Ring 2B Network Topology with Distances

90km

94km

59km

Springfontein

ColesbergNoupoortDe Aar 115km

Potfontein

Oranjerivier

Heuningneskloof

53km

63km

65km

Petrusburg81kmKimberley Bloemfontein

Edenburg

79km

67km

58km

Figure 3: Ring 2B Topology


2.5. Ring 2B Network Dimensioning


Node ROADM

Subsystem

(Add/Drop)

Number of

Directions

(Degrees)

10Gb/s

Mux-

ponder

Line Speed Per

Direction


Heuningneskloof Yes 2 100Gb/s 1 0 4 0 0 0 4

Oranjerivier No 2 Yes 100Gb/s 0 0 4 0 0 0 4

Potfotein Yes 2 100Gb/s 1 0 4 0 0 0 4

De Aar Yes 3 100Gb/s 4 4 4 4 4 2 6

Noupoort Yes 3 100Gb/s 4 4 4 4 4 2 6

Colesburg Yes 2 100Gb/s 0 0 4 0 0 0 4

Springfontein Yes 3 100Gb/s 4 4 4 4 4 2 6

Edenburg Yes 2 100Gb/s 0 0 4 0 0 0 4

Petrusburg Yes 2 100Gb/s 1 0 4 0 0 0 4


2.6. Ring 3 Network Topology with Distances

84km

41km

41km

19km

De AarMerrimanHutchinson

Nelspoort

54km

BeaufortWest

53km

Leeu Gamka

81km

Prince Albert 41km

Laingsburg

Tourwsriver

Worcester

88km

81km

77km

Wolseley

Hugenot

77km

44km

Darling

Saldanha

Loop 1

92km

46km

Loop 2

Loop 3

Loop 4 Loop 5

52km

43km

45km

Loop 6

Loop 7

Potfontein Oranjerivier

Heuningneskloof

53km 63km

65km

Kimberley

BarkleyWest

Koopmansfointen

Lime Acres

Postmasburg

Gamagara

Loop 19Loop 18Loop 17Loop 16

Loop 15

52km44km

41km

Loop 14

Loop 13Loop 12

Loop 11

Loop 10

Loop 9Loop 8

46km

40km

46km

50km

39km

39km

38km40km

61km

48km

55km

53km

81km

80km

58km

63km

55km

41km

67km

25km

Yzerfontein (WACS)

Bellville POP

Cape Town

90km

Teraco (Rondebosch)

25km

28km

35km

Figure 4: Ring 3 Topology

Note: See notes at the end of the document for explanation of dotted lines


2.7. Ring 3 Network Dimensioning


Node ROADM

Subsystem

(Add/Drop)

Number of

Directions

(Degrees)

10Gb/s

Mux-

ponder

Line Speed

Per

Direction


Barkley West Yes 2 100Gb/s 0 0 4 0 0 0 4

Koopmansfontein Yes 2 100Gb/s 1 0 4 0 0 0 4

Lime Acres No 2 Yes 100Gb/s 0 0 4 0 0 0 4

Postmansburg Yes 2 100Gb/s 1 0 4 0 0 0 4

Gamagara Yes 2 100Gb/s 5 4 4 4 4 2 6

Loop 19 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 18 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 17 Yes 2 100Gb/s 2 0 4 0 0 0 4

Loop 16 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 15 Yes 2 100Gb/s 6 4 4 4 4 2 6

Loop 14 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 13 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 12 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 11 No 2 Yes 100Gb/s 0 0 2 0 0 0 2


Loop 10 Yes 2 100Gb/s 6 4 4 4 4 2 6

Loop 9 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 8 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 7 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 6 Yes 2 100Gb/s 2 0 4 0 0 0 6

Loop 5 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 4 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 3 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 2 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Loop 1 No 2 Yes 100Gb/s 0 0 2 0 0 0 2

Saldanha Yes 2 100Gb/s 6 4 4 2 2 2 4

Darling Yes 3 100Gb/s 4 4 4 2 2 2 4

Yzerfontein (WACS) Yes 2 100Gb/s 6 6 4 2 2 2 6

Bellville Yes 4 100Gb/s 7 6 4 2 2 2 6

Cape Town Yes 3 100Gb/s 7 4 4 4 2 2 6

Teraco(Rondebosch) Yes 2 100Gb/s 6 4 4 4 2 2 6

Hugenot No 2 Yes 100Gb/s 0 0 4 0 0 0 2

Worseley No 2 Yes 100Gb/s 0 0 4 0 0 0 2

Worcester No 2 Yes 100Gb/s 0 0 4 0 0 0 2

Touwsrivier No 2 Yes 100Gb/s 0 0 4 0 0 0 2

Laingsburg No 2 Yes 100Gb/s 0 0 4 0 0 0 2


Prince Albert No 2 Yes 100Gb/s 0 0 4 0 0 0 2

Leeu Gamka No 2 Yes 100Gb/s 0 0 4 0 0 0 2

Beaufort West Yes 2 100Gb/s 6 4 4 4 2 2 6

Nelspoort No 2 Yes 100Gb/s 0 0 4 0 0 0 2

Hutchisson No 2 Yes 100Gb/s 0 0 4 0 0 0 2

Merriman No 2 Yes 100Gb/s 0 0 4 0 0 0 2


2.8. Ring 4 Network Topology with Distances

101km

125km

86km

40km

52km

85km

82km

Pretoria North

Bronkhorst Spruit

Witbank Belfast Ngodwana

Nelspruit

Kaapmuiden Komatipoort

IreaghTzaneen HoedspruitPolokwane

Mookgopong

Bela Bela

90km

65km

Soekmekaar

68km

65km

96km

68km

114km

82km

Phalaborwa

50km

Figure 5: Ring 4 Topology


2.10 Ring 4 Network Dimensioning


Node ROADM

Subsystem

(Add/Drop)

Number of

Directions

(Degrees)

10Gb/s

Mux-

ponder

Line Speed

Per Direction


Witbank Yes 3 100Gb/s 3 2 4 2 1 1 4

Belfast No 2 Yes 100Gb/s 0 0 4 0 0 0 4

Ngodwana No 2 Yes 100Gb/s 0 0 4 0 0 0 4

Nelspruit Yes 2 100Gb/s 3 2 4 2 1 1 4

Kaapmuiden Yes 3 100Gb/s 1 2 2 1 1 1 4

Komatipoort Yes 1 100Gb/s 1 2 2 1 1 1 4

Ireagh No 2 Yes 100Gb/s 0 0 4 0 0 0 4

Hoedspruit Yes 3 100Gb/s 2 2 2 1 1 1 4

Phalaborwa Yes 1 100Gb/s 0 2 2 1 1 1 4

Tzaneen Yes 2 100Gb/s 2 2 2 1 1 1 4

Soekmekaar No 2 Yes 100Gb/s 0 0 4 0 0 0 4

Polokwane Yes 2 100Gb/s 3 2 4 2 1 1 4

Mookgopong No 2 Yes 100Gb/s 0 0 4 0 0 0 4

Bela Bela No 2 Yes 100Gb/s 0 0 4 0 0 0 4


2.11 Ring 5 Network Topology with Distances

Ring 5

94km59km

60km

East London

Cambridge

Blaney

Stutterheim

48km

Chathcart

Queenstown

68km

Sterkstroom

58km

Burgersdorp 90kmSpringfontein BethulieColesbergNoupoortRosemead

Cradock

Cookhouse

Alicedale

Swartkops

Port ElizabethNorth End

44km 77km

9km

44km

47km

101km

81km

87km

15km

69km

Port Elizabeth

10km

Adelaide

3km

Alice

King Williams Town

73km

19km

57km

69km

Ngqura

94Km

Uitenhage25Km

Figure 6: Ring 5 Topology Note: See notes at the end of the document for explanation of dotted lines




Node ROADM

Subsystem


10Gb/s Muxpon

der



Rosemead No 2 100Gb/s 0 0 0 0 0 0 0

Cradock No 2 100Gb/s 0 0 0 0 0 0 0

Cookhouse No 3 100Gb/s 0 0 0 0 0 0 0

Alicedale No 2 100Gb/s 0 0 0 0 0 0 0

Ngqura Yes 2 100Gb/s 4 4 4 4 4 2 4

Swartkops Yes 2 100Gb/s 4 4 4 4 4 2 4

Uitenhage N/A N/A Yes 10Gb/s 0 4 4 0 4 2 4

PE North End Yes 2 100Gb/s 4 4 4 4 4 2 4

Port Elizabeth Yes 2 100Gb/s 4 4 4 0 2 0 4

East London Yes 2 100Gb/s 4 4 4 0 2 0 4

Cambridge Yes 2 100Gb/s 4 4 4 4 4 2 4

Blaney Yes 4 100Gb/s 0 0 0 0 0 0 0

King Williams Town Yes 2 100Gb/s 4 4 4 2 2 2 4

Alice Yes 2 100Gb/s 4 4 4 4 4 2 4

Adelaide No 2 100Gb/s 0 0 0 0 0 0 0

Stutterheim No 2 100Gb/s 0 0 0 0 0 0 0

Cathcart No 2 100Gb/s 0 0 0 0 0 0 0

Queenstown Yes 2 100Gb/s 4 4 4 4 4 2 4

Sterkstroom No 2 100Gb/s 0 0 0 0 0 0 0

Burgersdorp No 2 100Gb/s 0 0 0 0 0 0 0

Bethulie No 2 100Gb/s 0 0 0 0 0 0 0


2.13 Ring 7 TPL 48 CORE Network Topology with Distances

Johannesburg

Balfour North standerton Vooruitsig Newcastle

9Km

60Km 80Km 71Km Glencore

Ladysmith

Estcourt

Mooirivier

Pietermaritzburg

Bayhead

Island ViewTwiniHilltop

57Km

67Km

67Km

34Km

86Km

104Km

25Km85KmMnambithiWarden 150Km110Km

Villiers

105K

m

Jameson Park

88Km

40Km

TPL 48 CORE RING 7

NOC(Pinetown)24Km 23Km Durban

9Km

Alrode

Langlaagte

29Km

Germiston

Union Hiedelburg

16Km

13Km

42Km 32Km

Note: See notes at the end of the document for explanation of dotted lines Figure 7: Ring 7 Topology




Node ROADM Subsyste

m


10Gb/s Muxpon

der



NOC(Pinetown) Yes 2 100Gb/s 4 4 4 2 2 0 2

TM1(Island View) Yes 2 100Gb/s 2 2 2 0 0 0 2

PS1(Twini) Yes 2 100Gb/s 2 2 2 0 0 0 2

PS3(Hilltop) Yes 2 100Gb/s 2 2 2 0 0 0 2

PS5(Mnambithi) Yes 2 100Gb/s 2 2 2 0 0 0 2

PS7(Warden) Yes 2 100Gb/s 2 2 2 0 0 0 2

PS8(Villiers) Yes 2 100Gb/s 2 2 2 0 0 0 2

TM2(Jameson Park) Yes 2 100Gb/s 2 2 2 0 0 0 2

Langlaagte Yes 2 100Gb/s 4 4 4 4 4 2 4

Alrode Yes 2 100Gb/s 4 4 4 4 4 2 4



Isando

Germiston

Johannesburg

Randfontein Magaliesburg

13Km

16Km

47Km

34Km Derby Swartruggens Rustenburg

Brits

Pretoria North

PretoriaEsselenPark

54Km 52Km 67Km

57Km

57Km

14Km

30Km15Km

RING 8

Zeerust

70Km

Lobatse 55Km





Node ROADM

Subsystem


10Gb/s Muxpon

der



Magaliesburg No 2 Yes 100Gb/s 0 2 2 0 0 0 8

Derby No 2 Yes 100Gb/s 0 0 0 0 0 0 0

Swartraggens Yes 3 100Gb/s 4 4 4 4 4 2 12

Zeerust Yes 3 100Gb/s 1 0 4 0 0 0 8

Lobatse Yes 1 100Gb/s 4 4 4 4 0 0 12



Mahikeng Zeerust Swartruggens Derby Magaliesburg32Km 70Km 52Km 54Km Randfontein

Oberholzer

Potchefstroom

KlerksdorpLeuudoringstadBloemhofChristiana 40Km

34Km

57Km

40Km

67Km

58Km

82Km

74KmWarrenton

Taung

66Km

Vryburg

70Km

Madibogo Pan

64Km

92Km

RING 9





Node ROADM Subsyste

m


10Gb/s Muxpon

der



Mahikeng Yes 2 100Gb/s 4 4 4 4 0 0 4

Madibogo Pan No 2 100Gb/s 0 0 0 0 0 0 0

Vryburg Yes 2 100Gb/s 2 2 2 0 0 0 2

Taung No 2 Yes 100Gb/s 0 4 4 4 0 0 2


Notes:

(a) It should be noted that all the sites with no Add/Drop capabilities should be configured as

Optical Line Amplifiers; should the supplier decide to configure these with ROADM

functionality, there should not be a cost associated with this.

(b) On areas where the DWDM Add/drop functionality is required, the system must be able to

provide sub-wavelength grooming. This is to ensure that the traffic / interfaces below a

lambda (10Gb/s) level can be provisioned. Such solution is envisaged to look like the

figure10 below; however, the bidder can provide their solution:

Figure 10: Sub-wavelength Grooming

(c) At some of the OLA / repeater sites, client interfaces are required for sub-10G traffic. A

solution that utilizes 10Gb/s Mux-ponder/s is required. The bidder must provide their

solution for the required mux-ponder which must be managed by the same management

platform. TFR will use an additional pair of fibre to for the provision of this solution. The

mux-ponder must be based on either OTN / MPLS-TP / CET / NG SDH. The design

for this type of solution is envisaged to look like figure 10 below.

(d)


Figure 11: 10Gb/s Mux-ponder requirement

(e) Please note the following legend for the design:

Fibre to be leased from 3rd

parties

Future fibre network

(f) For Ring 2A, the following design criteria must be followed:

Bethlehem will have a 10Gb/s OTN/Mux-ponder working off Kroonstad.

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