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OV 9 - 1 Copyright © 2013 Logical Operations, Inc. All rights reserved. WAN Infrastructure  WAN Transmission Technologies  WAN Connectivity Methods 

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Presentation on theme: "OV 9 - 1 Copyright © 2013 Logical Operations, Inc. All rights reserved. WAN Infrastructure  WAN Transmission Technologies  WAN Connectivity Methods "— Presentation transcript:

1 OV 9 - 1 Copyright © 2013 Logical Operations, Inc. All rights reserved. WAN Infrastructure  WAN Transmission Technologies  WAN Connectivity Methods  Voice over Data Transmission

2 OV 9 - 2 Copyright © 2013 Logical Operations, Inc. All rights reserved. ATM Cell switching technology 53 byte cell

3 OV 9 - 3 Copyright © 2013 Logical Operations, Inc. All rights reserved. Frame Relay DCE Customer network DTE FRBS provides reliable communication and efficient error-handling

4 OV 9 - 4 Copyright © 2013 Logical Operations, Inc. All rights reserved. MPLS Performs label switching

5 OV 9 - 5 Copyright © 2013 Logical Operations, Inc. All rights reserved. DSL PSTN Transmits digital signals on phone lines

6 OV 9 - 6 Copyright © 2013 Logical Operations, Inc. All rights reserved. ISDN ISDN Adapter ISDN Switch Packet data network Circuit-switched data network Private network TelcoSubscriber

7 OV 9 - 7 Copyright © 2013 Logical Operations, Inc. All rights reserved. T-Carrier Systems T-Carrier circuit T-1: 24 channels T-3: 672 channels

8 OV 9 - 8 Copyright © 2013 Logical Operations, Inc. All rights reserved. Digital Network Hierarchies Digital networks have two hierarchical structures:  Plesiochronous Digital Hierarchy (PDH)  Synchronous Digital Hierarchy (SDH)  Data moves on an optical fiber using LEDs  Basic data transmission occurs at a rate of 155.5 Mbps

9 OV 9 - 9 Copyright © 2013 Logical Operations, Inc. All rights reserved. SONET/SDH Routes between regional networks Routes between regional networks Joins multiple collector rings Joins multiple collector rings DCS to place customer’s signal on ring Regional network Broadband backbone network Collector ring Integrated management LAN

10 OV 9 - 10 Copyright © 2013 Logical Operations, Inc. All rights reserved. The Optical Carrier System The OC standard:  Specifies the bandwidth for fiber optic transmissions  Is based on DSH with data rate: 810 channels  An open-ended standard

11 OV 9 - 11 Copyright © 2013 Logical Operations, Inc. All rights reserved. Satellite Transmission Systems A satellite-based network:  Offers immense geographical coverage  STS are used as an alternative to conventional communications  STS is a cost-effective method to transmit information to different locations globally Satellite communications systems:  Use LOS microwave transmission  Consist of two segments  Space – Contains one or more satellites organized into a constellation and a ground station.  Ground – Provides access from Earth stations to the satellite  Contains three basic types of terminals – Fixed, Transportable and Mobile.

12 OV 9 - 12 Copyright © 2013 Logical Operations, Inc. All rights reserved. Satellite Transmission Systems (Cont.) Data transmission using LOS

13 OV 9 - 13 Copyright © 2013 Logical Operations, Inc. All rights reserved. WWAN

14 OV 9 - 14 Copyright © 2013 Logical Operations, Inc. All rights reserved. WiMAX Wireless Interoperability for Microwave Access (WiMAX):  Is a packet-based wireless telecommunication technology that provides wireless broadband access over long distances.  Based on the IEEE 802.16 standard it is intended for wireless MANs.  Provides fixed and mobile broadband access.  Covers a range of about 30 miles for fixed stations and 3 to 10 miles for mobile stations.  Provides line of sight and non-line-of-sight communications.  Provides connection speeds of about 70 Mbps.  Operates in the wireless frequency ranges of between 2 and 11 GHz of the wireless spectrum.

15 OV 9 - 15 Copyright © 2013 Logical Operations, Inc. All rights reserved. WiMAX (Cont.) 30 miles of coverage for fixed stations 3 to 10 miles of coverage for mobile stations

16 OV 9 - 16 Copyright © 2013 Logical Operations, Inc. All rights reserved. Cable Internet Access Cable TV feed Cable modem ISP TV signal

17 OV 9 - 17 Copyright © 2013 Logical Operations, Inc. All rights reserved. Cable Modems  Are hardware devices that connect subscribers to the service provider's cable systems.  Use twisted pair cabling and a 10/100 network port or USB connection.  Connect on one end to the subscriber's computer and on the other end to the wall jack using coaxial cabling.  Can function reliably for speeds up to 27 Mbps.  Operate at the Physical and Data Link layers of the OSI Model. SubscriberCable modemService provider Connect subscribers to the service provider’s cable systems

18 OV 9 - 18 Copyright © 2013 Logical Operations, Inc. All rights reserved. Dial-Up Connections Modem Provides WAN connectivity using modems and phone lines PSTN

19 OV 9 - 19 Copyright © 2013 Logical Operations, Inc. All rights reserved. Dial-Up Modems SenderReceiver Telephone line Dial-up modem

20 OV 9 - 20 Copyright © 2013 Logical Operations, Inc. All rights reserved. Dial-Up Modems (Cont.)  Is a communication device that converts a computer's digital signals into analog signals before transmission over telephone lines.  Converts digital signals into analog and analog signals into digital. The word, modem, represents modulation and demodulation.  Can be either  Internal – exist a part of motherboard and use the PC's power supply.  External – connect via USB port as separate expansion boxes. Require separate power supply  Is slow when compared to broadband modem.

21 OV 9 - 21 Copyright © 2013 Logical Operations, Inc. All rights reserved. Leased Data Lines Telco Leased data line

22 OV 9 - 22 Copyright © 2013 Logical Operations, Inc. All rights reserved. ICS ICS host ICS client

23 OV 9 - 23 Copyright © 2013 Logical Operations, Inc. All rights reserved. Satellite Media Signal transferred between physical link and satellite link

24 OV 9 - 24 Copyright © 2013 Logical Operations, Inc. All rights reserved. Converged Networks  Allow all three types of traffic (voice, video and data) to move over the same network.  Convert digital signals into analog and analog signals into digital.  Allow all three types of traffic to move over the same network.  VoIP is the convergence of data, voice, and video networks. VoiceVideoData

25 OV 9 - 25 Copyright © 2013 Logical Operations, Inc. All rights reserved. Voice over Data Systems Converts analog voice into digital data AnalogDigital Voice device

26 OV 9 - 26 Copyright © 2013 Logical Operations, Inc. All rights reserved. VoIP VoIP Interface PBX VoIP-compatible fax machine VoIP-compatible fax machine

27 OV 9 - 27 Copyright © 2013 Logical Operations, Inc. All rights reserved. VoIP Protocols VoIP protocols include:  Session Initiation Protocol (SIP)  Session Description Protocol (SDP)  Real-time Transport Protocol (RTP)  Real-time Transport Control Protocol (RTCP)

28 OV 9 - 28 Copyright © 2013 Logical Operations, Inc. All rights reserved. Reflective Questions 1. Which WAN technologies do you expect to work with on your home and office networks? Why? 2. In your opinion, what is the future for the implementation of voice over data systems on conventional networks?

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