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Core and Access Technologies

Core and Access Technologies. www.slt.lk. Content. Introduction Voice Communication Data communication Data Computer Networks IP Services Copper Wire (DSL Services). www.slt.lk. Content (contd.). Fixed Wireless Broadband Fibre Broadband Access Technologies. www.slt.lk.

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Core and Access Technologies

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  1. Core and Access Technologies www.slt.lk

  2. Content • Introduction • Voice Communication • Data communication • Data • Computer Networks • IP Services • Copper Wire (DSL Services) www.slt.lk

  3. Content (contd.) • Fixed Wireless Broadband • Fibre Broadband Access Technologies www.slt.lk

  4. Introduction www.slt.lk

  5. Voice CommunicationData Communication Voice Data www.slt.lk

  6. Voice Communication www.slt.lk

  7. Wired - Copper cable pair Wireless - Radio signal www.slt.lk

  8. Fixed Mobile www.slt.lk

  9. Fixed Wired Wireless (WLL) Local loop Exchange ( Wired or wireless ) www.slt.lk

  10. Fixed - Wired Exchange Copper pair loop www.slt.lk

  11. Fixed – Wireless (CDMA) www.slt.lk

  12. Mobile Network 1 G – 1st Generation 2G – 2nd Generation 3G – 3rd Generation Same as PSTN. Mobility Management Mobile Voice www.slt.lk

  13. Public Switched Telephone Network (PSTN) www.slt.lk

  14. PSTN www.slt.lk

  15. Customer Premises Equipment (Telephone) Service Provider (operator) Premises Equipment (Exchange) Access Network Access Network www.slt.lk

  16. Core Network Exchanges Transmission link www.slt.lk

  17. Mic Sound Energy Electric Energy Speaker Voice Signal Telephone Channel 0 – 4 kHz Analog Signal www.slt.lk

  18. Voice Services • Normal Telephone Service (Plain Old Telephone System - POTS) • Voice Mail • Call Forwarding • Call Conferencing www.slt.lk

  19. Circuit Switching • Telephone Exchange ,Mobile Switching Centre • Connect users (Telephones) • Circuit Switching • Real Time Connection (No Delay) www.slt.lk

  20. Data Communication www.slt.lk

  21. Data Communication www.slt.lk

  22. 1 0 1 1 0 0 0 1 0 0 Data Digital Signals 1010111011 Electrical Signal www.slt.lk

  23. 1,0 - Bits Bits 11011 - 5 Bits 110 - 3 Bits www.slt.lk

  24. Bit Rate - Measurement of Bit Speed Bits Per Second – How many Bits Travel in one second 1 b/s, 10 b/s Data Traveling www.slt.lk

  25. Bit Rate • k – kilo - 1000 • M – Mega - 1000000 • G – Giga - 1000000000 • T – Tera - 1000000000000 • 1 kb/s - 1000 b/s • 1 Mb/s - 1000 Kb/s • 1 Gb/s - 1000 Mb/s • 1 Tb/s - 1000 Gb/s www.slt.lk

  26. Data Services • World Wide Web (www) • Electronic Mail (E - mail) • Short Message Service (SMS) • Multi Media Services (MMS) www.slt.lk

  27. Data Packet Group of Bits www.slt.lk

  28. Packet Switching Exchange (PSE) www.slt.lk

  29. www.slt.lk

  30. Packet Switching www.slt.lk

  31. IP data & Non - IP data • IP – Internet Protocol • Standards defined by internet society Data Non - IP IP www.slt.lk

  32. IP Data Services • World Wide Web • E - mail www.slt.lk

  33. Non – IP Data Services • SMS - Short Message Service • MMS – Multimedia Message Service www.slt.lk

  34. Access Network - IP Non – IP • Core Network - IP Non – IP www.slt.lk

  35. IP Core Network PSE is called Router www.slt.lk

  36. IP - MPLS Core Network PSE is called Router www.slt.lk

  37. Multiplexer TDM Core Network TDM - Time Division Multiplexing www.slt.lk 37

  38. MPLS TDM ( IP Core Network ) ( Non IP Core Network ) Mobile Core Network PSTN Core Network www.slt.lk

  39. Can We send Data through PSTN? • Yes - Shall Convert to an analog signal Similar to Voice- Use a Modem Speed : 9.6 kbps, 14.4 kbps, 28.8 kbps, 56 kbps www.slt.lk

  40. Can We send Data through Mobile Network? • Yes - Same as PSTN - Use a Modem • 1 G – 9.6 kb/s • 2 G – GSM Circuit Switched Data (CSD) - 9.6 kb/s High Speed CSD ( HCSD) - 43.2 kb/s www.slt.lk

  41. Can Mobile Network send Packet Switched Data ? • Yes - 2 G and Upwards MSC – Mobile Switching Center DSE – Data Switch Exchange www.slt.lk

  42. GSM Packet Switch Data GPRS - General Packet Radio System EDGE - Enhanced Data Rate for Global Evaluation • GPRS – (Up to 60 kbps) • EDGE – (Up to 236 kbps) www.slt.lk

  43. Can CDMA Network send Packet Switched Data ? • CDMA Data- Data through circuit switch (9.6 kbps)- Data through Packet switch – (EV-DO) Download up to 2 Mb/s EV-DO – Evolution-Data Optimized or Evolution-Data only www.slt.lk

  44. 3 G Packet Switched Data • High Speed Downlink Packet Access (HSDPA) Downlink Speed – upto 14 Mb/s www.slt.lk

  45. Data through MPLS core network VPN – Virtual Private Network • Bandwidth is shared • Can use for IP data – upto 155 Mb/s www.slt.lk

  46. Data through TDM core network This is Called a “Leased Line” Dedicated Channel Speed : N x 64 kb/s, N = 1, 2, …..30 64 kb/s, 128 kb/s, 192 kb/s, 2048 kb/s www.slt.lk

  47. Computer Networks www.slt.lk

  48. Computer Networks • PAN -about 10m radius • LAN -within a building or within a campus • MAN -several km radius • WAN -countrywide, worldwide PAN - Personal Area Network LAN - Local Area Network MAN - Metropolitan Area Network WAN - Wide Area Network www.slt.lk

  49. LAN www.slt.lk

  50. WAN WAN link - Leased line - IP-VPN www.slt.lk

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