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The SBC enforces bi-lateral agreements where two carriers agree on the set of signaling they will mutually support.

Background Information

  • The requirements specified in the section "Background Information and Dependencies" under Minimal Out-Of-The-Box Configuration are met.
  • Ports and IP Interface Groups have been configured as described in NNI: Complex route selection.
  • Ingress/egress signalling filters are configured.
  • SIP Message content manipulation is enabled.


Figure : Bi-Lateral Agreement Enforcement


  • The peering SBC ensures that the correct aspects and interpretations of the SIP protocol are used between carriers.
  • Operators have different SIP "flavors" and the SBC plays a role in ensuring that each side receives the correct SIP headers/content/formats they expect.

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