Multipoint Control Unit Roni Even VP Strategic Product Planning Accord Networks www'accordnetworks'c

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Multipoint Control UnitRoni EvenVP Strategic
Product PlanningAccord Networkswww.accordnetwork
s.com
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Multipoint Control Unit

• Network entity providing capability for
  multipoint conferences
• Consist of MC (Multipoint Controller) and zero or
  more MPs (Multipoint Processors)
• MCU defined in H.323. Can support H.320/H.321
  terminals

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Multipoint Controller

• The entity that control the multipoint
  conferences
• Provides capability negotiation with terminals
  and decide on the conference common mode during
  the conference
• Control and allocate the conference resources

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Multipoint Processor

• Provides central processing of Video, Audio or
  Data stream
• Provides switching, mixing or transcoding of
  media streams
• Controlled by the MC

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Multipoint Conference

• Conference between three or more terminals
• Conference types
• Centralized conferences.
• Decentralized conferences using multicast.
• Hybrid Conferences centralized audio.
• Mixed conferences.

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Multipoint Conference

• Conference modes
• Video switching conference
• Voice activated
• Lecture Mode
• Continuous presence video mixing conferences
• 4 QCIF to CIF H.261
• Different layouts
• Different views

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MCU types

• Software MCUs
• Include MC
• Audio mixing
• Video switch
• 4 QCIf to CIF H.261 4 way continuous presence

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MCU types

• MCUs with Audio MP
• Include MC
• Audio mixing using DSPs
• Video switch
• 4 QCIf to CIF H.261 video mixing
• Audio transcoding

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MCU types

• MCUs with audio and video MPs
• Include MC
• Audio mixing
• Video switch or mixing
• Full continuous presence.
• Full transcoding video and audio

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Conference management

• In-band using H.243 for conference control
• Web browser is used for conference setup and
  control of on going conference. Out of band
  signaling
• Reservation based conferences.

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Conference setup

• End-point call conference alias or MCU dial out.
• Master-slave determination capabilities
  exchange
• MC controls conference mode using H.245
  CommunicationModeCommand.
• MC manages media rates and algorithms using H.245
  RequestModeCommand and flowControlCommand

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About Accord Networks

• Accord Networks is the leading manufacturer of
  the V²IPERA family of IP, ATM and ISDN visual and
  voice communications solutions including MCUs,
  Network Gateways, Protocol Gateways and
  Management systems.
• V²IPERA include the MGC-100, MGC-50 and
  WebCommander.
• Accord Corporate HQ is in Atlanta, RD and
  manufacturing are in Israel, European HQ is in
  Maidenhead UK and has an office in China.