1 / 30

1CSNW1 – week 3 Datacommunicatie

1CSNW1 – week 3 Datacommunicatie. Datacommunicatie?. Datacommunicatie ?. Communications men string telephone wire on an Enewetok tree. National Park Service (USA). Datacommunicatie (1). Multi processor. PU-1. PU-2. MEMORY. I/O. Adresbus databus besturingsbus. Tightly coupled.

dante-kelly
Télécharger la présentation

1CSNW1 – week 3 Datacommunicatie

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 1CSNW1 – week 3Datacommunicatie

  2. Datacommunicatie? Datacommunicatie ? Communications men string telephone wire on an Enewetok tree. National Park Service (USA)

  3. Datacommunicatie (1) Multi processor PU-1 PU-2 MEMORY I/O Adresbus databus besturingsbus Tightly coupled

  4. Datacommunicatie (2) datacommunicatie kanaal Systeem 1 Systeem 2 loosely coupled, via (extern) netwerk

  5. Communicatiekanaal A B Simplex A B Half-duplex A B Full-duplex

  6. Parallel versus serieel • Bits per second (bps) vs. Bytes per second (Bps) • Baud rate: symbols/sec • bps = baud . 2log n (n: number of signal levels)

  7. Baud rate The number of signaling elements that occur each second. The term is named after J.M.E. Baudot, the inventor of the Baudot telegraph code. bijvoorbeeld 4 niveaus 00 01 10 11 element twee bits bit rate = 2 x baud rate

  8. Multiplexing Multiplexer Demultiplexer

  9. TDM versus FDM Time Division Multiplexing Frequency Division Multiplexing

  10. Shift (transmit) clock Tc Shift register Serial data • Bipolar encoding • Manchester encoding Data buffer Parallel data Clock extracting receiver PLL Serieel (bit-synchroon)

  11. BI-SYNC protocol

  12. Serieel (frame synchroon)(tijdelijk synchroon) idle

  13. Shift register Serial data Data buffer Parallel data Start bit data bit data bit Par bit Stop bit samples trigger Serieel (asynchroon)

  14. data data ready ready Parallel (strobe) Een strobe is een opgaande of neergaande flank

  15. data REQ ACK Parallel (handshake)

  16. data data ready Ack ready Ack data valid Parallel (handshake)data staat klaar

  17. Centronics Interface

  18. V.21: 300 bps duplex V.22: 1200 bps duplex V.22bis: 2400 bps duplex V.24: interchange DTE – DCE (RS232) V.32: 9600 bps duplex V32bis: 14.400 bps duplex V.34: 28.800 bps duplex V.90: 56.600 bps duplex X.25: The most popular packet-switching protocol for WANs X.400: The universal protocol for e-mail. V(oiceband) en X - normen ComitéConsultatifInternationalTélégraphiqueetTéléphonique (CCITT) Nu: International TelecommunicationUnion (ITU)

  19. V.24 - RS-232 (25-polig) Recommended Standard => EIA-232-DElectronic Industries Alliance

  20. RI = Ring Indicator 9-polige RS-232 connector

  21. Null Modem DTE DTE Data Terminal Equipment

  22. RS-232 signaal Single-ended

  23. Openbare ‘analoge’ netwerken Spraak 4 kHz bandbreedte (300 - 3400 Hz)

  24. Modulatie: AM, FM, PM

  25. DTE DTE DCE DCE Data Terminal Equipment Data Communication Equipment V24 of RS 232 V21 … V34 Modem (modulator/demodulator)

  26. (Asymmetric) Digital Subscriber Link Splitter Modem Computer

  27. DSL DigitalSubscriberLink 5460 m

  28. ADSL Spectrum Fritz!box Image: Wikipedia

  29. CMTS CableModemTerminationSystem

  30. Opdrachten • Bestudeer hfdst. 10.1 t/m 10.6 • Maak opgaven 10.1 t/m 10.4 en 10.6

More Related