market scenario & bsnl status · tellabs networking elements, which •offer multiple...

For internal circulation of BSNLonly

E2-E3

E&WS MLLN

WELCOME

• This is a presentation for the E2-E3 E & WS

• Module for the Topic: MLLN

• Eligibility: Those who have got the Upgradation to from

E2 to E3.

• This presentation is last updated on 18-3-2011.

• You can also visit the Digital library of BSNL to see this

topic.


AGENDA

Introduction of Leased line

Over view of MLLN Network

MLLN Architecture

Conventional Leased Line

TVARIT System


Leased Line – Introduction

1. A leased circuit is a dedicated link provided between two fixed locations for exclusive use of the customer.

2. It is a dedicated point to point line connecting the facilities of a Customer for telephone sets, EPABX,Computers, etc. or for forming a VPN.


Need for Leased Line

• Connecting geographically spread out locations.

• Dedicated transmission.• Security.• Ease of communication.• Stand by arrangement.• Networking.• Interconnection.


IMPORTANTANCEOFLEASEDLINES

• Leased circuit provides us high revenue.• Leased circuits serve very important needs of

customers.• Expectations of customers are very high.

They need high Q.O.S. & want to sign SLAs.• In the changing economic environment

dependence of activities on leased circuits is increasing.

• Due to emerging competition rates are bound to go further down with many more new features.


What is MLLN

• MLLN Stands for Managed Leased Line Network.

• MLLN is a Fully Managed Access Network, which allows the operator to keep an end-to end

• control over the customer circuit and hence provide him guarantees of uptime of the circuit (QoS, SLA’s).

• MLLN is a Next generation Digital Access Network which provides solutions to all the

• Data networking and Voice requirements of the customer.

• MLLN is an Overlay network realized through Tellabs Networking Elements, which

• offer Multiple Value-added and customized services to the customers.


Segments Addressed by MLLN

• Managed Bandwidth Leased Lines to Alternate Service Providers.

• Paging ,VAS , Cellular, ISP & Value added Service Providers.

• Virtual Private Network (VPN). • Stock exchanges, Banks, MNCs, Publishing

Houses, Software Developers, Broadcasting companies.

• Multi-Service Network for Governance applications , State Wide Networks.

• Enhanced support for legacy applications Hotlines, PABX-IC, Point to Multi-point circuits, ISDN Service extension, Data circuit for Security & Travel applications


Tellabs 8170 cluster node

Tellabs 8110 NTU

Tellabs 8150 basic node

All elements managed end-to-end by one system:

the Tellabs 8100 network manager

Tellabs 8160

accelerator node A111

Tellabs 8100 Network Elements

Tellabs 8120 mini node

Tellabs 8130 micro node

Tellabs 8140 midi node

MLLN ARCHITECTURE

• MLLN Elements

• DXC (Digital Cross-Connect)

• VMUX (Versatile Multiplexer)

• NTU (Network Terminating Unit)

• NMS (Network Management System)

• (Centralized NMS for the whole network having

main NMS site at Bangalore and the Disaster

Recovery(DR) site at Pune)


Cluster Node(DXC)

• DXC

• In Master and Slave Configuration

• Modular DACC - 32 to 256 E1’s

• Full management from NMS


Basic Node(VMUX)

• VMUX

• 3 Types of V-MUX

V-MUX Type-1, V-MUX Type-2 &

V-MUX Type-3 (AC/DC Power)

• Built-in HDSL modem interfaces



Features of MLLN elements

• NTU

• Wide range

• HDSL Network interfaces

• Different types of CPE interfaces

• Long drive on copper (7 km)



NMS

• NMS

• Best in the industry

• User friendly GUI

• Open & redundant architecture


BSNL MLLN NETWORK

• Covering around 600 cities nationwide

• 3 tier architecture of DXCs

• Core network of regional DXCs (R-DXCs) at

Mumbai, Delhi, Kolkatta and Chennai and Sub

Regional (SR-DXCs) at various locations in the

four maintenance regions


BSNL MLLN NETWORK

• Mesh connectivity between R-DXCs • Mesh connectivity between SR-DXCs of

the same region.• All SR-DXCs connected to R-DXCs.• Major SSAs have been provided with SS

DXCs.• Remote Operator Terminal (ROT) planned

for every station having more than 30 leased circuits.


DIGITAL CROSS CONNECT (DXC)

Features of DXC

Capacity

DXC (64 ports upgradeable to 128 ports)



DXC (256 ports)

• I/0 cross-connect capability

• Non-Blocking Architecture


DIGITAL CROSS CONNECT (DXC)

• RedundancyPower SupplySwitching MatrixCross-connect Memory

• Expansion to be made possible by addition of cards only

• Fully Managed from Centralized NMS


Tellabs 8170 DXC


VERSATILE MULTIPLEXER (VMUX)

Types of VMUX Cards

V-MUX Type-IA (PFUA-1,OMH-5 ,QMH- 2,XCG-1)

V-MUX Type-IIA (PFUA-1,OMH-2,XCG-1)

V-MUX Type-IIIA (PUA/PFUA-1,OMH-2,XCG-1)

230V AC Powered

-48V DC PoweredExpansion to be made possible on the same chassis by addition of cards.



• VMUX to be able to extend hotline circuits.

• Point to point and Point to Multi-point circuit routing are possible.

• HDSL Driving Distance:

3.5km at 2Mbps5 km at 1Mbps7km for 64/128kbps (at 0.5mm dia copper cable)




V-MUXType

Initial Requirement Expansion Requirement (Incremental)

N x 64kbp

s

Hotline

E1 N x 64kbps

Hotline

E1

VMUX Type 1A 40 12 8 4

VMUX Type 2 16 4 8 4

VMUX Type 3

AC/DC

16 4 4 8 4 4

Tellabs 8150-VMUX TPYE-1A


NETWORK TERMINATION UNIT (NTU)

Features of NTU• Capacity

64/128kbps NTU with V.35 interface64/128kbps NTU with G.703 interfaceN x 64kbps NTU with V.35 interfaceN x 64kbps NTU with G.703 interfaceN x 64kbps NTU with Ethernet Interface

• Line Loop Testing as per ITU-T rec V.54• NTU to send power off signal to the NMS at the

time of NTU getting switched off.


Types of NTUs with different interfaces

• Tellabs 8110 STU-160/V.35 for 64/128 kbps NTU

with V.35 interface

• Tellabs 8110 STU-160/G.703 for 64/128 kbps NTU

with G.703 interface.

• STU-160 works up to 128kbps

• CTU-S and CTU-R works up to 2Mbps on a single

pair of copper


Network Terminating Unit (NTU)


NETWORK MANAGEMENT SYSTEM

• Features of NMS

• (Centralized NMS for the whole network having

main NMS site at Bangalore and the Disaster

Recovery(DR) site at Pune)

• MLLN NMS Billing and Accounting System

• Web Self-care system


NETWORK MANAGEMENT SYSTEM

• MLLN NMS performs all the management functions on

the network

• Provides complete functionalities

• Supports regional partitioning and VPN capabilities

• Performance Monitoring, Recovery, Reporting Packages


Conventional Leased Circuits

• Upgradability :In steps 64K, 2M

• Monitoring :No

• Manageability :No

• Testing :Fault localization Lengthy (NFF)

• Coordination Problems :Fault in Modem/ Last mile

• Provisioning :Long (Patching)

• SLA :No

• Bandwidth on Demand :No


Leased Circuits on MLLN

• Upgradability :In N * 64K

• Monitoring :Yes

• Manageability :Yes

• Testing :Fault localization Faster

• Coordination :No Problem

(Both Modem/ Last mile of BSNL)

• Provisioning :Fast (Config.)

• SLA :Yes

• Bandwidth on Demand :Yes


MPLS VPN

• Upgradability :In n * 64K (even for non- MLLN)

• Monitoring :Yes (even for non- MLLN)

• Manageability :Yes

Testing :Fault localization Faster

(Monitoring by NOC even for Non- MLLN)

• Coordination :Depends on last mile (MLLN ?)

• Provisioning :Fast (Config.)

• SLA :Yes (even for non- MLLN)

• Bandwidth on Demand :Yes


MPLS Vs MLLN

• MPLS MLLN

• Security Leased, 100%

• IP based PPP

• QOS ,not 100%assured 100% available

• Shared dedicated


LEASED CIRCUIT MEDIA

• Leased circuits are available on

Optical Fiber MediaRadio MediaCopper Wire andSatellite Media or aCombination of these media

• Local media and national long distance media are by the BSNL/MTNL and International Mediaby VSNL


TYPE OF LEASED CIRCUIT SERVICES

1. Speech Circuits (Hot Line or P-Wire) - Local or Long distance circuits within a city or between two different cities provided for the same applicant. The terminating equipment at both ends is telephone without dialing facility. Both way signaling and speech is possible.

2. Data Circuits - Local or Long distance data circuits at different speeds viz. 2.4Kbps,4.8Kbps, 9.6K bps, 64 kbps, nx64 kbps and 2 Mbps.



• Telegraph Circuits:- Local and Long distance

Tele- printer Circuits.

• International Leased Circuits:- Provided through

VSNL.



• Point-to-Point Data Circuits - Local and Long

distance.

• Private Data Network - More than one Local or

Long distance leased circuits.

• converging on a location such that data from one

leased circuit can be transferred automatically to

another leased circuit for the same subscriber.


What is TVARIT ?

• TVARIT is Sanskrit word for the term “ IMMEDIATE”.

• TVARIT is “ LEASED LINE ONLINE ” provisioning

and upkeep system.

• It is computerized online system, simple to operate &

self explanatory.

• Paperless.

• Reliable, Fast and Instant execution of transactions.

• All the manual activities are computerized.


NUMBERING SCHEME OF LEASED CIRCUIT

• Every leased circuit will have a number as

• ABCD/JKL/XY/EFGH

WHERE ABCD= originating SDCA code

EFGH= Terminating SDCA code

JKL = Circuit number

XY = Circuit type



• For circuit within the same

SDCA,ABCD=EFGH

• For 3 digit code, D= # and H= #

• For 2 digit code, C, D, = # and G, H = #

• For 3 digit SDCA code, for JKL = 000 to 999,

the circuit number will be

ABC#/JKL/XY/EFGH



• For the circuit falling between 1000 to 1999 in SDCA with 2

digit code (i.e. JKL = 1000 to 1999),

• Value of D = * & C = # and the circuit number will become

AB#/*JKL/XY/EFGH

• For the circuit falling between 2000 to 2999 in SDCA with 2

digit code (i.e. JKL = 2000 to 2999),

• Value of C = * & D= * and the circuit number will become

AB/**JKL/XY/EFGH


XY codes of Tvarit

• 11 Speech circuit (with HOT line relay set)

• 12 Speech circuit (on PAX)

• 13 Speech-cum-data circuit

• 14 Voice grade data circuit

• 15 VFT

• 16 64 kbps circuit

• 17 N x 64 kbps circuits

• 18 2 Mbps circuit





XY codes Tvarit

• 22 STM-1

• 23 STM-4

• 24 STM-16

• 25 STM-64

• 26 R&G copper cable

• 27 R&G OFC cable

• 28 R&G UHF microwave

• 29 Contribution work copper cable

• 30 Contribution work OFC

• 31 Contribution work UHF microwave

• Any additional series code, (XY) will be centrally allotted


HOW TO ACCESS TVARIT

• TVARIT is accessible by :

• PSTN DIAL-UP ( 022-22670080)

• ISDN DIAL-UP ( 022 –22639280 / 22639310 / 22639340 / 22639420)

• LEASED LINE ( 64 Kbps / 2 Mbps ) (LAN-WAN connectivity)

• Launch Internet explorer

• Write http://10.10.0.1/admin in the address bar

• The home page will be opened

• Enter valid username and password.

• Home page of the user will be opened.

• Carry out the required tasks by following the on-line menus


http://10.10.0.1/admin

Key Features of TVARIT System

• Generation of the standard 13 digit unique number.

• Generation of the Provisional and final demand notes, Advice

notes, Receipts and other general feasibility and channel

allocation reports.

• Generation of Recurring bill.

• Generation of a full fledge Managerial Information Reports (MIS) .

• Current accurate status viewing to all the concern authorities.

• Address change and cancellation of the circuits


Thanks


market scenario & bsnl status · tellabs networking elements, which •offer multiple...

Documents