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About Gailtel a Department of GAIL India

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  1. 1. By-VAIBHAV JINDAL07/N/275EC-6
  2. 2. GAILTEL PresentationTable of Contents• Introduction• Role of Telecom in GAIL• Communication System In GAIL,PATA
  4. 4. Basic of Telecom System / NetworkCommunication means transportinginformation (Voice / Data / Video) from onepoint to other.Transmitter ReceiverSource DestinationOutputTransmission SystemTransmission Media
  5. 5. Communication SystemDuplex Communication LinkLocationBRXTXVoiceVoiceDataDataVideoVideoChannel (carries Information) LinkAny Communication System can be characterized by :• Source : Transmit Point (TX)• Destination : Receive Point (RX)• Communication Medium : Copper, Co-axial, MW, Satellite, Optical• Information Transfer Capacity : function (Channel, Link) = Bandwidth• Traffic : Flow of Information from one location to other
  6. 6. Basics of Telecom System / NetworkComparative Study of CoxialCable andOFCableCharacteristics Coaxial OFC1. Right of way Required Required2. Bandwidth Limited Very High3. Expansion /ScalabilityMedium Excellent4. Immunity toInterferenceProne Quite immune tointerferences
  7. 7. VSAT NetworkHBJ NetworkGREP NetworkJLPL NetworkMCPC NetworkSub Network-1 Sub Network -2Sub Network-3Sub Network -4Sub Network -5GAILnet(GAIL’s own dedicated integrated communication network)Sub Network-7Sub Network-6DVPL NetworkGAILTEL NetworkVSPL NetworkSub Network-8
  8. 8. GAILTEL Phase-I NetworkNetwork Length: 1650 kmDelhiBarodaMumbaiVijaipurJaipurJamnagar AhmedabadJodhpurUdaipurRajkotKandlaLoniPalanpurJLPL NetworkPhase-I NetworkBareillyAgraGwaliorMadhya PradeshUttar PradeshMaharastraRajasthanGujaratSuratMeerutMathura
  9. 9. Phase 1 Network Deployed in 2002, spans over 1650 Km, extends fromBareilly to Vijaipur via Delhi and from Palanpur toMumbai via Baroda It also provides the connectivity to major cities like:Ahmadabad, Baroda, Surat, Jaipur, Udaipur, Jodhpur,Agra, Meerut. In this network SDH & DWDM equipment of M/s Nortelhave been deployed. The equipped capacity of Phase-I network is 2.5 Gbps.
  10. 10. Phase-I+ JLPL NetworkPhase-IIA NetworkDelhiBarodaMumbaiVijaipurLucknowJamnagarAhmedabadChandigarhBhopalKanpurIndoreJodhpurUdaipurRajkotKandlaKheraHaziraNasikJaipurLoniSuratPalanpurBareillyAgraGwaliorMadhya PradeshUttar PradeshMaharastraRajasthanGujaratMeerutMathuraGAILTEL Phase-IIA NetworkNetwork Length: 1700 Km
  11. 11. Phase 2A Network Deployed in 2003-04 and spans over 1700 Km. It consists of Links:a) from Baroda to Mumbai as a redundant link,b) from Bareilly to Kanpur,c) from Delhi to Chandigarhd) DVPL link from Vijapur to Dahej It also provides connectivity to major cities like:Lucknow, Bhopal, Indore, Nasik, Thane, Ambala, Karnal& Panipat In this network SDH & DWDM equipment of M/s Nortelhave been deployed. The equipped capacity of Phase-IIA network is 2.5 Gbps
  12. 12. DelhiBarodaMumbaiVijaipurLucknowJamnagarAhmedabadChandigarhBhopalKanpurIndoreJodhpurUdaipurRajkotKandlaKheraHaziraNasikJaipurLoniSuratPalanpurBareillyAgraGwaliorMadhya PradeshUttar PradeshMaharastraRajasthanGujaratMeerutHyderabadVizagPuneVijayawadaAuraiyaPataRae-BareillyBadauinAligarhKarnatakaPhase-IIB NetworkGAILTEL Phase-IIB NetworkNetwork Length: 1900 KmPhase-I+IIA+ JLPL Network
  13. 13. Phase 2B Network Deployed in 2003-04 and spans over 1800 Km. It consists of Links:a) from Kanpur to Vijaipur,b) from Pune to Hyderabad,c) VSPL link from Hyderabad to Vizag It also provides connectivity to major cities like: Auraiya,Pata, Jhansi, Rae-Bareilly, Aligarh, Solapur, Sangareddy,Secunderabad, Vijayawada, Rajahmundry In this network SDH & DWDM equipment of M/s Fibcomhave been deployed. The equipped capacity of Phase-IIB network is 2.5 Gbps.
  15. 15. GAILTEL Business Bandwidth Sale : 3700 Mbps Annualized Revenue : Rs. 24 Crore
  16. 16. Communication in GAIL PATA PLANT isachieved by following ways: EPABX PA SYSTEMS RADIO PAGING SYSTEM WALKI TALKI/VHF based System PSTN/Wll/GSM SCADA SYSTEMS OFC Backbone (SDN STM1O)
  17. 17. Exc.ss130XXX31XXX33XXX34XXX9XXX32XXX35XXXExc.QcLab.Exc.DownstreamExc.SB1MainExc.SS4EPABXEPABX#1EPABX#2TownshipTownshipBack BoneModemModem ModemModemModemModemModemModemModemSTM 16LIMABSS/HDSL(2 Mbps)(2 Mbps)ExchangeConnectivityInGAIL (PATA)30 ChannelSs 4SB1DownStreamModemModem30 ChanelSS1Town ShipQCLab.EPABXEPABXModemModemSS4
  18. 18. GAILTOWNSHIPEXCHANGEGAILPLANTEXCHANGE(SS4)TMUXPMUXADMR.R. R.R.DCC34 Mbps (E3)Tributary Side16*2Mbps(E1)Back Bone2 Wire CopperRouter InterfaceRS232/ V.352 Wire CopperRouter InterfaceR232 or V.355 K.M.Connectivity Plant to TownThrough BackboneADMADM: Add Drop MultiplexerRR: Repeater & RegeneratorTMUX: Tributary Multiplexer
  19. 19. TelephoneRJ11 SocketRosetteBoxDrop Wire2/4 PairDBJunctionBoxFeederCableField(MDF)Exchange(MDF)ExchangeJumper WireConnection of Exchange to TelephoneMDF: Main Distribution FrameDB: Distribution Box
  20. 20. 0 1 20 1 2 3 4 5Exchange No. 001ModuleNo.0ModuleNo.1ModuleNo.2ModuleNo.3SubModules0 1 2 30 1 20 10 1 20 120 1 30 1 20 1 320 1 4320 10 1 20 1 320 1 4320 10 1 20 1 320 1 20 1 320 432 54320 1Line CardsPowerCard(PU4DC)Flash CardNo. Planning for EPABX0010To30To51To16Ex.No.ModuleNo.SubModuleCktNo
  21. 21. PDH (Plesiochronous Digital Hierarchy)• Plesiochronous is a Greek word meaning AlmostSynchronous , but not fully synchronous.• In Plesiochronous system every equipment isgenerating its own clock for synchronization.
  22. 22. Digitisation ProcessTelephony signals:• 4 Khz Voice signal is sampled at twice the frequency-8000 Hz• Samples are Quantized- Benchmarked to nearestpredefined levels• Quantized samples are encoded using 8 binary bits• Each Voice channel hence occupies8x8000 = 64000 Bits per Second = 64 Kbps000000010000001000000011....
  23. 23. Multiplexing HierarchyPDH (D1 Level )(PCM 30 Mux )32 * 64 KHz = 2.048 Mb/sCapacity = 30 Base ChannelsPDH (D2 Level )4 * 2.048 +stuffing bits = 8.448 MbpsCapacity = 120 Base ChannelsPDH (D3 Level )4 * 8.448 + stuffing bits = 34.368 MbpsCapacity = 480 Base ChannelsPDH (D4 Level )4 * 34.368 +stuffing bits = 139.264 MbpsCapacity = 1920 Base Channels
  24. 24. Limitations There is insufficient provision for network management within the PDH frame format for them to be able to do this. No standard for synchronization Standard equipment from different vendors are not compatible Increase in number of equipments required. Theres no standardized definition of PDH bit rates greater than140 Mbit/s
  25. 25. SDH (Synchronous Digital Hierarchy )
  26. 26. SDH EquipmentTerminal Multiplexer• Path Termination equipment which acts asconcentrator of tributary signals like E1Regenerator• Regenerator is used to boost the signalsbetween multiplexers placed across a longdistanceAdd-Drop Multiplexer•Add Drop Multiplexer is used to access the signals to bedropped or inserted while allowing the other signals toflow through without processingSTM-4E 1E 3T 1Path TerminationEquipmentPath TerminationEquipmentRegeneratorSTM-4STM- 4STM- 4 STM- 4
  27. 27. SDH- Network Topologies Point to Point• Involves two terminal multiplexersconnected together with an opticalfiber with or without regenerators Point to Multipoint• This configuration necessarilyinvolves a Add Drop Multiplexerwhich connects to multiple sitesadding or dropping signals ateach sitePTE Regenerator PTEPTERegeneratorADM PTERegenerator
  28. 28. SDH- Network TopologiesMUXRegeneratorDCSRegeneratorRegeneratorMUXMUXMUXRegenerator Hub Configuration• Hub configuration involves a Digital Cross ConnectSystem at the centre of a mesh network, grooming thetraffic from various directions. Ring Configuration• Ring configuration involves multiple ADMs connectedalong the optical fiber ring either in bi-directional orUni-Directional connectivity.ADMADM ADMADM
  29. 29. STM-N ProcessDS1 (1544 Kbps)E1 (2048 Kbps)DS2 (6312 Kbps)E3 (34368 Kbps)DS3 (44736 Kbps)E4 (139264 Kbps)