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Transcript

  • 1. INTERNET PROTOCOL TELEPHONY PRESENTED BY:- GAURAV DASHARIA BHAGAT SINGH ATUL KUMAR SENGAR
  • 2.
      • Introduction
      • Voice-over-Internet-Protocol
      • Transmission of Voice Using IP
      • Market Prospects
      • Session Initiation Protocol
      • H.323 Protocol
      • Advantages of IP for Voice
      • Disadvantages
      • Applications
  • 3. Introduction
    • Technologies that use Internet protocol
    • have the potential to reduce costs.
    • Internet protocol technology pose
    • challenges for regulators.
    • Internet protocol technology for voice
    • can advance the goal of affordable
    • service.
  • 4.
    • VoIP is a term that refers to all types
    • of voice communication using Internet
    • protocol technology.
    • Voice-over-the-internet is a service in
    • which a regular voice telephone call is
    • transmitted.
  • 5.
    • The caller’s voice is digitized.
    • The digital voice is compressed and
    • then separated into packets.
    • Packets may be lost or delayed
    • during transmission on the Internet.
    • The transmission is assembled to
    • restore the data.
  • 6.
    • A VoIP system consists of a number
    • of different components.
    • The digital signal processor segments
    • the voice signal into frames.
    • Coders are used for efficient bandwidth
    • utilization.
  • 7. SET UP REQUIRED
  • 8.
    • Phones are connected directly to
    • telephone company phone lines.
    • Household VoIP hardware uses
    • broadband modems.
    • Early adopters of VoIP may also be
    • users of other phone equipment.
  • 9.
    • Takes up a dedicated communication
    • path.
    • The source and destination are
    • connected temporarily.
    • Destination node status is necessary.
  • 10.
    • Messages are received at intermediate
    • routing points.
    • Also known as store and forward
    • switching.
    • Normally accepts all traffic.
  • 11. Session Initiation Protocol
    • Designed by Henning Schulzrinne and
    • Mark Handley in 1996.
    • Used for creating, modifying and
    • terminating sessions.
    • Features of SIP are:
    • Light weight
    • Transport-independent
  • 12.
    • SIP clients use TCP to connect to SIP
    • servers and other SIP endpoints.
    • SIP can be used where session
    • initiation is a requirement.
    • SIP was used to provide a signalling
    • and call set up protocol.
  • 13.  
  • 14.
    • Makes use of elements called proxy
    • servers.
    • Provides a registration function.
    • A user agent server is given the special
    • name called Registrar.
  • 15.
    • Allow callers and callees to be
    • identified.
    • Invitation is the most common
    • operation of SIP.
  • 16.
    • Relies on following recommendations:
      • Call signaling
      • Bearer signaling
      • Transport of audio,video
      • Security defined
  • 17.
    • Defines several types of equipment.
    • Consists of following devices:
      • Terminal
      • Gateway
      • Gatekeeper
      • MCU
  • 18.  
  • 19.
    • Greater Efficiency
    • Lower Cost
    • Higher Reliability
    • Supporting Innovation
  • 20.
    • SIP is transported over Transmission
    • Control Protocol.
    • Supports user mobility with two
    • operating modes:
      • Proxy
      • Redirect
  • 21.  
  • 22.
    • H.323 is a packet-based multimedia
    • communication system.
    • Classify and solve multimedia
    • delivery issues.
    • Contains three components:
      • Call processing servers
      • Media gateways
      • Gatekeepers
  • 23.
    • The business benefits:
      • Reduced long distance costs
      • More enhanced services
    • The technical benefits:
      • Less bandwidth
      • More efficient use
  • 24.
    • VoIP is dependent on wall power.
    • Systems may be integrated into the
    • phone line.
    • Emergency 911 calls.
    • Normally associated with
    • home broadband services.
  • 25.
    • Radio Over Internet Protocol has
    • adapted VoIP.
    • Radio operators using radios are
    • able to tune to repeaters.
  • 26.
    • Internet based telephony holds the
    • future of communication .
    • Efforts are being made to make the
    • maximum possible utilization of the
    • bandwidth.
  • 27. Any Questions…..????