Your SlideShare is downloading. ×
2.2.2b6   medio de tx- red telefonica-review
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

2.2.2b6 medio de tx- red telefonica-review

430

Published on

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.

Published in: Education, Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
430
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
4
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. LHDG / 2012A 1
  • 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. LHDG / 2012A 3
  • 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. Structure of the Telephone System (a) Fully-interconnected network. (b) Centralized switch.LHDG / 2012A (c) Two-level hierarchy. 5
  • 6. Structure of the Telephone System (2) A typical circuit route for a medium-distance call.LHDG / 2012A 6
  • 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. 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. 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. Modems(a) A binary signal (c) Frequency modulation(b) Amplitude modulation (d) Phase modulation 10
  • 11. Modems (2) (a) QPSK. (b) QAM-16. (c) QAM-64.LHDG / 2012A 11
  • 12. Modems (3) (a) (b) (a) V.32 for 9600 bps. (b) V32 bis for 14,400 bps.LHDG / 2012A 12
  • 13. Digital Subscriber Lines Bandwidth versus distanced over category 3 UTP for DSL.LHDG / 2012A 13
  • 14. Digital Subscriber Lines (2) Operation of ADSL using discrete multitone modulation.LHDG / 2012A 14
  • 15. Digital Subscriber Lines (3) A typical ADSL equipment configuration.LHDG / 2012A 15
  • 16. Wireless Local Loops Architecture of an LMDS system.LHDG / 2012A 16
  • 17. Frequency Division Multiplexing (a) The original bandwidths. (b) The bandwidths raised in frequency.LHDG / 2012A (b) The multiplexed channel. 17
  • 18. Wavelength Division Multiplexing Wavelength division multiplexing.LHDG / 2012A 18
  • 19. Time Division Multiplexing The T1 carrier (1.544 Mbps).LHDG / 2012A 19
  • 20. Time Division Multiplexing (2) Delta modulation.LHDG / 2012A 20
  • 21. Time Division Multiplexing (3) Multiplexing T1 streams into higher carriers.LHDG / 2012A 21
  • 22. Time Division Multiplexing (4) Two back-to-back SONET frames.LHDG / 2012A 22
  • 23. Time Division Multiplexing (5) SONET and SDH multiplex rates.LHDG / 2012A 23
  • 24. Circuit Switching (a) Circuit switching.LHDG / 2012A (b) Packet switching. 24
  • 25. Message Switching(a) Circuit switching (b) Message switching (c) Packet switching 25
  • 26. Packet Switching A comparison of circuit switched and packet- switched networks.LHDG / 2012A 26

×