LHDG / 2012A   1
LA RED TELEFONICA PUBLICA CONMUTADA                       CONTENIDO           Introducción           Estructura del Sistem...
LHDG / 2012A   3
Public Switched Telephone System   •           Structure of the Telephone System   •           The Politics of Telephones ...
Structure of the Telephone System               (a) Fully-interconnected network.               (b) Centralized switch.LHD...
Structure of the Telephone System (2)         A typical circuit route for a medium-distance call.LHDG / 2012A             ...
Major Components of the Telephone System  •       Local loops          Analog twisted pairs going to houses            an...
The Politics of Telephones          The relationship of LATAs, LECs, and IXCs. All the             circles are LEC switchi...
The Local Loop: Modems,                 ADSL, and Wireless        The use of both analog and digital transmissions for a  ...
Modems(a) A binary signal        (c) Frequency modulation(b) Amplitude modulation   (d) Phase modulation       10
Modems (2)               (a) QPSK.               (b) QAM-16.               (c) QAM-64.LHDG / 2012A                 11
Modems (3)               (a)                     (b)               (a) V.32 for 9600 bps.               (b) V32 bis for 14...
Digital Subscriber Lines   Bandwidth versus distanced over category 3                   UTP for DSL.LHDG / 2012A          ...
Digital Subscriber Lines (2)    Operation of ADSL using discrete multitone                    modulation.LHDG / 2012A     ...
Digital Subscriber Lines (3)        A typical ADSL equipment configuration.LHDG / 2012A                                   ...
Wireless Local Loops               Architecture of an LMDS system.LHDG / 2012A                                     16
Frequency Division Multiplexing               (a) The original bandwidths.               (b) The bandwidths raised in freq...
Wavelength Division Multiplexing               Wavelength division multiplexing.LHDG / 2012A                              ...
Time Division Multiplexing                 The T1 carrier (1.544 Mbps).LHDG / 2012A                                    19
Time Division Multiplexing (2)               Delta modulation.LHDG / 2012A                            20
Time Division Multiplexing (3)       Multiplexing T1 streams into higher carriers.LHDG / 2012A                            ...
Time Division Multiplexing (4)               Two back-to-back SONET frames.LHDG / 2012A                                   ...
Time Division Multiplexing (5)               SONET and SDH multiplex rates.LHDG / 2012A                                   ...
Circuit Switching               (a) Circuit switching.LHDG / 2012A               (b) Packet switching.    24
Message Switching(a) Circuit switching (b) Message switching (c) Packet switching   25
Packet Switching  A comparison of circuit switched and packet-               switched networks.LHDG / 2012A               ...
2.2.2b6   medio de tx- red telefonica-review
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2.2.2b6 medio de tx- red telefonica-review

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Repaso sobre la red telefónica pública conmutada utilizada como medio de transmision de datos.

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2.2.2b6 medio de tx- red telefonica-review

  1. 1. LHDG / 2012A 1
  2. 2. LA RED TELEFONICA PUBLICA CONMUTADA CONTENIDO Introducción Estructura del Sistema Telefónico La política de los Teléfonos El Cto. Local: modems, ADSL e Inalámbrico Troncales y multiplexión ConmutaciónLHDG / 2012A 2
  3. 3. LHDG / 2012A 3
  4. 4. Public Switched Telephone System • Structure of the Telephone System • The Politics of Telephones • The Local Loop: Modems, ADSL and Wireless • Trunks and Multiplexing • SwitchingLHDG / 2012A 4
  5. 5. Structure of the Telephone System (a) Fully-interconnected network. (b) Centralized switch.LHDG / 2012A (c) Two-level hierarchy. 5
  6. 6. Structure of the Telephone System (2) A typical circuit route for a medium-distance call.LHDG / 2012A 6
  7. 7. Major Components of the Telephone System • Local loops  Analog twisted pairs going to houses and businesses • Trunks  Digital fiber optics connecting the switching offices • Switching offices  Where calls are moved from one trunk to anotherLHDG / 2012A 7
  8. 8. The Politics of Telephones The relationship of LATAs, LECs, and IXCs. All the circles are LEC switching offices. Each hexagon belongs to the IXC whose number is on it.LHDG / 2012A 8
  9. 9. The Local Loop: Modems, ADSL, and Wireless The use of both analog and digital transmissions for a computer to computer call. Conversion is done by the modems and codecs.LHDG / 2012A 9
  10. 10. Modems(a) A binary signal (c) Frequency modulation(b) Amplitude modulation (d) Phase modulation 10
  11. 11. Modems (2) (a) QPSK. (b) QAM-16. (c) QAM-64.LHDG / 2012A 11
  12. 12. Modems (3) (a) (b) (a) V.32 for 9600 bps. (b) V32 bis for 14,400 bps.LHDG / 2012A 12
  13. 13. Digital Subscriber Lines Bandwidth versus distanced over category 3 UTP for DSL.LHDG / 2012A 13
  14. 14. Digital Subscriber Lines (2) Operation of ADSL using discrete multitone modulation.LHDG / 2012A 14
  15. 15. Digital Subscriber Lines (3) A typical ADSL equipment configuration.LHDG / 2012A 15
  16. 16. Wireless Local Loops Architecture of an LMDS system.LHDG / 2012A 16
  17. 17. Frequency Division Multiplexing (a) The original bandwidths. (b) The bandwidths raised in frequency.LHDG / 2012A (b) The multiplexed channel. 17
  18. 18. Wavelength Division Multiplexing Wavelength division multiplexing.LHDG / 2012A 18
  19. 19. Time Division Multiplexing The T1 carrier (1.544 Mbps).LHDG / 2012A 19
  20. 20. Time Division Multiplexing (2) Delta modulation.LHDG / 2012A 20
  21. 21. Time Division Multiplexing (3) Multiplexing T1 streams into higher carriers.LHDG / 2012A 21
  22. 22. Time Division Multiplexing (4) Two back-to-back SONET frames.LHDG / 2012A 22
  23. 23. Time Division Multiplexing (5) SONET and SDH multiplex rates.LHDG / 2012A 23
  24. 24. Circuit Switching (a) Circuit switching.LHDG / 2012A (b) Packet switching. 24
  25. 25. Message Switching(a) Circuit switching (b) Message switching (c) Packet switching 25
  26. 26. Packet Switching A comparison of circuit switched and packet- switched networks.LHDG / 2012A 26
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