Broadband DLC

8/3/2019 Broadband DLC

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Broadband DLC Architecture

1. Introduction

BSNL Plans to introduce Broadband Services through the following Channels

1. ADSL Equipments through Project 2.2 of NIB II2. Broadband DLCs3. Wi-Fi and Wi-MAX

Kerala circle has to achieve a target of 45,000 Broadband Lines by December 2005. Out

of this, 33,000 lines are expected to be through NIB-II and 12,000 are through BroadbandDLCs.

BSNL Plans to introduce Broadband DLC in the network through three routes

1. Upgradation of Existing DLCs2. Procurement of BLCs from ITI3. Through BLC Tender

2. BLC Architecture for the Upgradation / ITI Procurement

2.1 COT Block Schematic

Broadband DLC COT

Excha

nge

DLC

SDH

ADM

Ethernet

Switch

Local DSLAM

Video /Content

Server

W

D

M

West

MPLS Core

Router

East


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2.2 RT Block Schematic

2.3 COT RT Architecture

DLCSDH

ADM

Ethernet

Switch

DSLAM

W

D

M

M

D

F

East

West

Broadband DLC RT

MPLS Core

Router

COT

RT

RT

RTRT

Exchan

ge

Video /Content

Server


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2.4 Capacity1. The Upgradation / New DLC equipments ordered are as per the above

configuration.

2. Capacity

DEL Broadband Lines

COT NA 256

RT 480 128

3. Total Ring capacity 768 Broadband Lines2.5 Alternate Deployment Plan

1. The PSTN DLC can be separated out i.e. the ADM and DLC in the aboveblock schematic.

2. The broadband equipment along with the WDM equipment can be integratedwith any other ADM Ring working on 1310 nm

3. The distance criteria will be around 40 Km.4. Existing Fiber can be utilized.5. All the ADMs in the Ring are to be converted to broadband.6. Accordingly it is possible to install the Broadband COT in any main exchange

and the RTs can be located in the RSUs. This is based on the convention thatthe main exchange and the RSUs are generally connected on an ADM Ring.


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3. BLC New Tender Architecture

1. BSNL is planning for a 0.36 Million new BLC Tender.2. The COT and its RTs are to be planned within the same SDCA3. Package I Architecture

a. Package I is for 12 Major cities including Ernakulamb. STM-16 RPR Access Ringc. There will be 4 Access Rings per COTd. 3 COT and 72 Type I/II/III RTs per city is plannede. Additionally there will be around 80 Type IV RTs per city

Network anatomy

RT per COT 24

RT per Access ring 6

Access rings per city 4

RT per city 72COT per city 3

f. The mesh network among the COTs will form the metro core.

RPRAccess

ring

IP/MPLS

metro corenetwork

IP/MPLS

NIB-II core

AccessAggregation/ metro

core

Regional broadband

NW

COT

VOD

Internet

Gaming

ideo

Head-end

MGW

COT


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g. Package I BRT Block schematic

EAST

E1s

POTS/ISDN

E1/G.703-704 l/lines

E1/ISDN-PRI

or EPL/EPLAN/EVPL etc.

10/100BaseFX I/F

for DSLAM subtending

GigE

DSL lines

FE i/facesEST

Transport Element

Access Ring

BLC Element

10/100BaseT interfaces

DSLAM Element

TDM

Element

STM-16 RPR MSPP

10/100BaseT

100BaseFX

TDM I/Fs

TDM I/Fs

FE+

GE

I/F

RPR

GFP/

VCAT/

LCAS

h. Package I COT Architecture

E1s

RPR traffic 1000BaseSX

from Access rings

COT Functional Block Schematic GigE

*To be implemented as part of DXC 4/3/1 for Access RPR ring termination and

for aggregating traffic from Access towards D-BRAS and vice-versa. D-BRAS Element

The D-BRAS and Router may be a single or two separte entitities.

Metro Access rings

E1s/V5.2

interfaces

COT

DXC 4/3/1

with RPR

Blade

V5.2

RPR

SW*

MLLN

Network

ASP's

NIB-II

Internet

PSTN

ISP's

or to other COTs

in Metro core


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i. Each COT can have up to 4 access rings terminated as shown above.j. Each access ring can have up to 6 RTs and hence 24 RTs per COT.k. One of the COTs will act as the Gateway to NIB II etc.l. The three COTs in Ernakulam can be located at say CSR, Boat Jetty and

Panampalli nagar exchanges. These will be interconnected on GigEthernet to form the metro core ring. The CSR will act as the gate way to

NIB-II

m. Type IV RTi. There will be 24 DSL Ports

ii. This will be connected to the COT/Type I/II/III RT on a starnetwork.

iii. Connectivity to the COT/Type I/II/III RT will be on dark fiberover Fast Ethernet.

iv. No Battery and Power Plant will be provided for these locations.n.

20 % of the Type I/II/III RTs and all Type IV RTs are to be plannedwithout Battery and Power Plants.

o. Ports plannedPorts type Type I Type II Type III Type IV

POTS interfaces 60 120 240 0

DSL interfaces 60 120 240 24

10/100BaseT customer LAN

interfaces forEPL/EPLAN/EVPL/EVPLAN/L2-L3VPNs

8 12 16 0

ISDN-PRI interfaces 2 2 2 0

ISDN-BRI interfaces 8 8 8 0

E1 G.703/G.704 interfaces for leased-lines

4 4 4 0

N*64Kbps G.703/G.704 interfaces forTDM leased-lines on point to pointSHDSL modems

4 8 12 0


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4. Package II Architecturea. Package II is for 155 cities. All remaining SSAs of Kerala are covered

under this package.

b. The Access Ring is WDM with Gigabit Ethernet RPR Ring for Data andSTM-1 for Voice.c. 1 COT and 15 RTs per city is planned

Network anatomy

RT per COT 15

RT per Access ring 5

Access rings per city 3

RT per city 15

COT per city 1

d. The architecture is as follows

RPR

Access

ring

MetroAggregation

RPR ring

IP/MPLS

Metro core

VOD

Internet

Gaming

Video

Head-end

Metro

Gateway

COT

Inter-

mediate

COT


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e. Package II BRT Block Schematic

TDM Element

EAST

for EPL/EPLAN

E1/G.703-704

L/Lines

STM-1

E1s

POTS/ISDN

*10/100BaseT I/F

10/100BaseT I/F

for DSLAM subtending

GE

DSL lines DSLAM

STM-1

WEST

Access Ring

10/100BaseT interfaces

Transport Element

* for EVPL/EVPLAN

/VPN etc.

BLC Element

1000BaseLH GE

from adjacent

RT East Side

GE

Ist order

MUX

STM-1

MUX

RPR

SW

1310/1550nm

WDM Splitter &

Filter

1310/1550nm

WDM

Coupler+Filter

f. Package II COT acting as metro gate way

Each

equivalent

o 2 fibre

connectivity one STM-1 each access ring

E1s/Ethernet Pvt. Lines

GigE

Local Metro Access GigE

GigE

GigE

one STM-1 each ring

COT Functional Block Schematic

D-BRAS Element at COT

and Metro

Aggregation ring/s

E1s/V5.2

GigE agregate

GBIC

RPR SWITCH

V5.2

1310/1550nm Coupler/filter &

Splitter/filter Elements

SDH DXC

1310/1550nm Coupler/filter

& Splitter/filter Elements

ASP's

NIB-II

Interne

ISP's

SDH

NW

PSTN


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g. Package II Type II COT part of metro aggregation Ring.

GE 1000BaseLH with IEEE 802.17 RPR

Metro Aggregation ring

Each

equivalent

to 2 fibre one STM-1

connectivity each access ring E1s/Ethernet

Pvt. Lines

Metro Access rings

one STM-1 each ring

Gigabit Ethernet 1000BaseLH @1550nm

with IEEE 802.17 RPR

To Type I COT

To Type I COT

E1s/V5.2

RPR

SWITCH

V5.2



SDH DXC

SDH

Network

PSTN

Network



h. Each Type II COT of the Access Ring can terminate up to 3 Access Ringswith 5 RTs each and hence 15 RTs per COT

i. Each City will have around 6 Type IV RTs in addition to the above.j. Type IV RT

i. There will be 24 DSL Portsii. This will be connected to the COT/Type I/II/III RT on a star

network.

iii. Connectivity to the COT/Type I/II/III RT will be on dark fiberover Fast Ethernet.

iv. No Battery and Power Plant will be provided for these locations.k. 20 % of the Type I RTs and all Type IV RTs are to be planned without

Battery and Power Plants.


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l. Ports PlannedPorts type Type I Type IV

POTS interfaces 60 0

DSL interfaces 60 24

10/100BaseT customer LANinterfaces for

EPL/EPLAN/EVPL/EVPLAN/L2-L3VPNs

8 0

ISDN-BRI interafces 8 0

ISDN-PRI interfaces 2 0

E1 G.703/G.704 interfaces for leased-lines

4 0

N*64Kbps G.703/G.704 interfaces for

TDM leased-lines on point to pointSHDSL modems

4 0

m. 3 Type II COTs along with one Type I COT will get interconnected overGig Ethernet to form the metro aggregation Ring.

i. Say 3 Type II COTs of TVM, KLM and PTA can form one metroaggregation Ring with Type I COT at ALP.

ii. KTM, TCR and PGT can form another aggregation Ring withType I COT at TCR.

iii. CNN, MRX and CLT can form another aggregation ring with TypeI COT at CLT.

n. The Type I COTs at ALP, TCR and CLT will be mesh connected to formthe metro core network.o. One of the Type I COT can act as the gateway to NIB II Backbone

network.

5. Services offereda. POTSb. Broadband DSLc. Direct Ethernetd. ISDN PRI and BRIe. 2 Mbps and n*64 Kbps leased lines with MLLN integration

Broadband DLC

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