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Circuit switch telecommunication network
This document summarizes the structure and components of the traditional telephone network, including exchanges, signaling systems, trunk lines, and hierarchies like PDH and SDH. It discusses the overall network architecture with analog and digital switches connected by various types of trunk lines. Signaling systems have evolved from SS1 to SS7 to support intelligent network services. SDH/SONET networks employ synchronous multiplexing in optical networks to transport telephone calls in digital formats. Bibliographies are also provided to learn more about digital telephony and SDH/SONET networks.
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Circuit switch telecommunication network
- 1. J.Tiberghien - VUBJ.Tiberghien- VUB Telecommunication s Concepts Chapter 2.1 The Circuit Switched Telephone Network
- 2. J.Tiberghien - VUBJ.Tiberghien- VUB Conten ts • The traditional Telephone Network –Overall structure –Trunk lines »Plesiochronous Data Hierarchy »Synchronous Data Hierarchy –Exchanges and signaling –General purpose SDH networks
- 3. J.Tiberghien - VUBJ.Tiberghien- VUB Conten ts • The traditional Telephone Network –Overall structure –Trunk lines »Plesiochronous Data Hierarchy »Synchronous Data Hierarchy –Exchanges and signaling –General purpose SDH networks
- 4. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network PABX SW SW SW SW SW PABX SW SW Analog / Digital
- 5. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network Some details : Analog telephones on analog switch twisted pair, average length 2.5 Km Line circuit Analog switch
- 6. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network Some details : Analog telephone on digital switch twisted pair, average length 2.5 Km Line circuit Digital switch Digital Analog
- 7. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network Some details : ISDN Basic Access twisted pair, average length 2.5 Km 144Kb/s modem Digital switch 144Kb/s modem S bus 2 * 64 Kb/s + 16 Kb/s
- 8. J.Tiberghien - VUBJ.Tiberghien- VUB Conten ts • The traditional Telephone Network –Overall structure –Trunk lines »Plesiochronous Data Hierarchy »Synchronous Data Hierarchy –Exchanges and signaling –General purpose SDH networks
- 9. J.Tiberghien - VUBJ.Tiberghien- VUB Time Domain Multiplexing 1 0 0 1 0 1 0 1 1 0 0 10 1 0 1 Synchronous multiplexing
- 10. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network Trunk Network (CEPT30) Optical Fiber or Microwave Link Digital switch Digital switch n*30*64 Kb/s n*2048 Kb/s
- 11. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network Trunk Network (Bell D2) Digital switch Digital switch n*23*64 Kb/s n* 1544 Kb/s Optical Fiber or Microwave Link
- 12. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network Some details : ISDN Primary Rate Digital switch 2048 Kb/s (CEPT30) Optical Fiber or Microwave Link PABX
- 13. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network Trunk Network Optical Fiber or Microwave Link n*30*64 Kb/s n*2048 Kb/s Analog switch Analog Digital
- 14. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network Trunk Network Digital switch Digital switch Optical Fiber or Microwave Link
- 15. J.Tiberghien - VUBJ.Tiberghien- VUB Conten ts • The traditional Telephone Network –Overall structure –Trunk lines »Plesiochronous Data Hierarchy »Synchronous Data Hierarchy –Exchanges and signaling –General purpose SDH networks
- 16. J.Tiberghien - VUBJ.Tiberghien- VUB Synchronous Multiplexing of almost synchronous data flows D C B AE S R Q PT F EST D C B AR Q P01F 1 Frame S C fout > n * MAX(fin)
- 17. J.Tiberghien - VUBJ.Tiberghien- VUB Plesiochronous Digital Hierarchy– Each multiplexed section has its own clock – Each level of multiplexing has its own clock – Frame structure from multiplexed signals is not explicitly present in the multiplexed stream > Full demultiplexing required at each node !
- 18. J.Tiberghien - VUBJ.Tiberghien- VUB Conten ts • The traditional Telephone Network –Overall structure –Trunk lines »Plesiochronous Data Hierarchy »Synchronous Data Hierarchy –Exchanges and signaling –General purpose SDH networks
- 19. J.Tiberghien - VUBJ.Tiberghien- VUB Synchronous Digital Hierarchy STM-1 STM-1 Up to 63 channels at 2 Mb/s – The entire trunk network has one clock – Multiplexed stream based on 125 µS frames – Different channels can each have their own asynchronous clock. – Add-drop multiplexers
- 20. J.Tiberghien - VUBJ.Tiberghien- VUB Synchronous Digital Hierarchy SDH - SONET Data rate CCITT USA-Elec. USA-Opt. 51.84 STS-1 OC-1 155.52 STM-1 STS-3 OC-3 466.56 STM-3 STS-9 OC-9 622.08 STM-4 STS-12 OC-12 933.12 STM-6 STS-18 OC-18 1244.16 STM-8 STS-24 OC-24 1866.24 STM-12 STS-36 OC-36 2488.32 STM-16 STS-48 OC-48
- 21. J.Tiberghien - VUBJ.Tiberghien- VUB SDH Rings 34 Mb/s 2 Mb/s
- 22. J.Tiberghien - VUBJ.Tiberghien- VUB SDH Rings
- 23. J.Tiberghien - VUBJ.Tiberghien- VUB SDH Rings
- 24. J.Tiberghien - VUBJ.Tiberghien- VUB SDH Rings The Worldcom Belgian Network 065 060 064 071 057 069 056 051 058 059 050 068 055 054 053 067 02 09 052 03 061 082 084 083 085 063 086 080 010 081 016 019 011 015 014 04 012 087 089013 WCOMPOP WCOMPOP WCOMPOP WCOMPOP WCOMPOP WCOMPOP WCOMPOP WCOMPOP WCOMPOP WCOMPOP LUXEMBOURG
- 25. J.Tiberghien - VUBJ.Tiberghien- VUB SDH Rings CUT !
- 26. J.Tiberghien - VUBJ.Tiberghien- VUB Conten ts • The traditional Telephone Network –Overall structure –Trunk lines »Plesiochronous Data Hierarchy »Synchronous Data Hierarchy –Exchanges and signaling –General purpose SDH networks
- 27. J.Tiberghien - VUBJ.Tiberghien- VUB Telephone Exchange (Conceptual Model) Switching Matrix Line Circuit Line Circuit Line Circuit Line Circuit Line Circuit Control Computer trunk lines + Inter-office signaling Register Register Register Register
- 28. J.Tiberghien - VUBJ.Tiberghien- VUB Signaling system generations• SS1 - SS5 : Analog call forwarding between exchanges • SS6 : First digital signaling system – monolithic communications system (no layers) – Full mesh of virtual circuits, based on 2400 b/s links • SS7 : Signaling system for the intelligent network – uses any digital links, satellites included – layered, OSI inspired, network architecture – supports "intelligent network" applications » Non-geographic numbers (800) » CLIP, Call forwarding, Conference calls, etc... » Number portability » Carrier selection » Mobility & roaming • IP ???
- 29. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone Network 629 62X 477 538 64X 643 673 Non-geographic Numbering 6234567 6292905 6433180 0800 12345 4776970 6736476 database 0800
- 30. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone NetworkNumber portability Ported numbers
- 31. J.Tiberghien - VUBJ.Tiberghien- VUB The Telephone NetworkCarrier selection • through prefix • through preselection
- 32. J.Tiberghien - VUBJ.Tiberghien- VUB Conten ts • The traditional Telephone Network –Overall structure –Trunk lines »Plesiochronous Data Hierarchy »Synchronous Data Hierarchy –Exchanges and signaling • General purpose SDH networks
- 33. J.Tiberghien - VUBJ.Tiberghien- VUB General Purpose SDH Networks PABX PABX
- 34. J.Tiberghien - VUBJ.Tiberghien- VUB Bibliography To know More about Telephony Recommended for this chapter John BELLAMY Digital Telephony Second edition John Wiley, 1991. ISBN : 0-471-62056-4
- 35. J.Tiberghien - VUBJ.Tiberghien- VUB Bibliography To know More about SDH Recommended for this chapter Mike SEXTON, Andy REID Transmission Networking: SONET and the Synchronous Digital Hierarchy Artech House, 1992. ISBN : 0-89006-551-9