Control Protocols

• H323 – Complex, multiple flow, ancient

  • Has a large install base

• Session Initiation Protocol (SIP)

  • New, simple, only sets up RTP streams

• Cisco Skinny (Proprietary)

  • Allows complete phone customization

• MGCP (media Gateway Control Protocol)

  • Good but Not widely deployed as SIP

• IAX (Inter-Asterisk eXchange)

  • Simple, transverses NAT, Compressed

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