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Networking :: HOWTO Set QoS on Your Network to Give Priority to SIP Traffic

If your network is not dedicated to SIP traffic but is used for other purposes in your company, you might want to set the QoS settings on your network to give SIP packets higher priority over other traffic. To do that you need to set the following on your network:

  • SIP (signalling) - Class 3, AF31, DSCP: 0x1A, TOS: 0x68
  • RTP (media) - Expedited Forwarding, EF, DSCP: 0x2E, TOS: 0xB8