Channel Identifier (CID)

• 7 bit CID field

  • Maximum users 127 - Active users ~ 65 (based on 50% on/off period of speech)
    • E.g. 65 G.723.1 mini packets: 1430 byte RTP payload
  • Reasonable packet assembly time
  • Maximum Transfer Unit (MTU) of IP datagram
  • Efficiency is sufficient

G.729 - 8 kbps - 10 byte / 10 msec G.723.1 - 5.3 kbps - 20 byte / 30 msec

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