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2.2.2b6   medio de tx- red telefonica-review
 

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.

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 2.2.2b6 medio de tx- red telefonica-review Presentation Transcript

    • LHDG / 2012A 1
    • 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
    • LHDG / 2012A 3
    • 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
    • Structure of the Telephone System (a) Fully-interconnected network. (b) Centralized switch.LHDG / 2012A (c) Two-level hierarchy. 5
    • Structure of the Telephone System (2) A typical circuit route for a medium-distance call.LHDG / 2012A 6
    • 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
    • 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
    • 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
    • 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 14,400 bps.LHDG / 2012A 12
    • Digital Subscriber Lines Bandwidth versus distanced over category 3 UTP for DSL.LHDG / 2012A 13
    • Digital Subscriber Lines (2) Operation of ADSL using discrete multitone modulation.LHDG / 2012A 14
    • Digital Subscriber Lines (3) A typical ADSL equipment configuration.LHDG / 2012A 15
    • Wireless Local Loops Architecture of an LMDS system.LHDG / 2012A 16
    • Frequency Division Multiplexing (a) The original bandwidths. (b) The bandwidths raised in frequency.LHDG / 2012A (b) The multiplexed channel. 17
    • Wavelength Division Multiplexing Wavelength division multiplexing.LHDG / 2012A 18
    • 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 21
    • Time Division Multiplexing (4) Two back-to-back SONET frames.LHDG / 2012A 22
    • Time Division Multiplexing (5) SONET and SDH multiplex rates.LHDG / 2012A 23
    • 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 26