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Training ppt  bsnl Training ppt bsnl Presentation Transcript

  • PRESENTED BY : RAJAN MEENA VIIth SEM ECE 08EC071
  • HISTORY OF BSNL  Firstly post and telegraph department came into existence in 1980.  First exchange in rajasthan was of 25 lines. Control of Ajmer was upto Udaipur, Agra and Ratlam.  In 1985, post and telegraph seperated into two different departments i.e. Department of Post and Department of Telegraph.
  • HOW SUBSCRIBER REACHES TO EXCHANGE Each subscriber who wants to contact require handset The handset divided into two main parts . The line chord is connected to the handset and reach to a black box known a ROSETTE Through the rosette two wires comes out which is connected with the WINDOW After that they reach the DP i.e. the DISTRIBUTION POINT
  • On DP the wires comes in the form of pair . One I DP 20 wires can be connected from different places  DP must be grounded . DP is a box which is installed on a petlar  After DP , there is a cabinet which is in the form of large box and which is kept in a large area which consists of approximately one thousand pair of wires . And then it connected to the another type of box this is called Main Distribution Frame
  • WiMAX Highlights • WiMAX – Worldwide Interoperability for Microwave Access – Is a certification mark for products that pass conformity and interoperability tests for the IEEE 802.16 – provides wireless data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access
  • • Speed – Faster than broadband service • Wireless – Not having to lay cables reduces cost – Easier to extend to suburban and rural areas • Broad coverage – Much wider coverage than WiFi hotspots
  • Two forms of wireless service • Line-of-sight service – Higher frequencies, lots more bandwidth – 30-mile radius • Non-line-of-sight – A small antenna on a computer connects to the tower – Uses 2 GHz to 11 GHz frequency range – Limited to a 4-to-6 mile radius
  • • BASE STATION (BS): The BS is responsible for providing the air interface to the MSS. • ACCESS SERVICE NETWORK GATEWAY (ASN-GW): The ASN gateway typically acts as a layer 2 traffic aggregation points within an ASN. Additional functions include intra-ASN location management and paging, and admission control, caching of subscriber profiles and encryption keys. • CONNECTIVITY SERVICE NETWORK (CSN): •The CSN provides connectivity to the Internet, ASP, other public networks, and corporate networks. The CSN is owned by the NSP and includes AAA servers that support authentication for the devices, users, and specific services.
  • WiMAX Applications • According to WiMAX Forum it supports 5 classes of applications: 1. Multi-player Interactive Gaming. 2. Video Conference 3. Streaming Media 4. Web Browsing and Instant Messaging 5. Media Content Downloads
  • Broadband Policy-2004 ALTTC/DX/IBB_OV/AKN 10 Broadband connectivity as defined in Broadband policy-2004 is an “always on” data connection that is able to support interactive services including Internet access and has the capability of minimum download speed of 256 kbps to an individual subscriber from the POP of the service provider
  • Internet v Broadband Sub’s in India ALTTC/DX/IBB_OV/AKN 11 0 10 20 30 40 2005 2007 2010 Internet Sub’s Broadband Sub’s 6M 3M 18M 9M 40M 20M
  • Broadband Technologies ALTTC/DX/IBB_OV/AKN 12 Broadband Technologies Wireless 3G Mobile Wireline Wi-Fi (Wireless Fidelity) Satellite DSL (Digital Sub’s Line) Cable Modem Optical Fibre Technologies PLC (Power Line Communication) WiMAX
  • OPTICAL FIBEROPTICAL FIBER
  • FIBER OPTICAL TRANSMISSION SYSTEM A Widely Used Communication Medium Based on TIR Information (Voice, Data Or Video) Is Transmitted In The Form Of Light FIG. COMMUNICATION THROUGH OPTICAL FIBRE
  • Jacket Cladding Core Cladding Angle of reflection Angle of incidence Light at less than critical angle is absorbed in jacket Jacket Light is propagated by total internal reflection Jacket Cladding Core (n2) (n2) Fig. Total Internal Reflection in an optical Fibre ARCHITECTURE OF FIBER AND IT’S PRINCIPLE
  • ADVANTAGES OF FIBER OPTICS High Speeds – Up To The Gigabits Low Interference Large Bandwidth Signals Can Be Transmitted At Larger Distances Without The Need Of Repeaters Greater Resistance To Electromagnetic Noise No Crosstalk
  • GSM Network Architecture MS BTS BTS BTS BTS BTS BTS BTS BTS BSC BSC PSTN VLR TRAU HLR EIR OMC SMSC BC AUC VMSC MSC Abis A OML
  • CELLULAR MOBILE CONCEPTS WHAT IS A CELL ? • A base station (transmitter) having a number of RF channels is called a cell • Each cell covers a a limited number of mobile subscribers within the cell boundaries ( Coverage area) • Typical Cell Radius Aprrox = 30 Km (Start up)
  • GSM Services SERVICE CATEGORIES Main type of telecommunication services: Basic services: Available to all subscribers to a mobile network. e.g. voice telephone calls. Supplementary services: Additional services that are available by subscription only. e.g. Call forwarding.