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SIP response code 484

  • Article
  • Applies to:
    Microsoft Teams

This article provides troubleshooting information for the combination of the SIP 484 error and Microsoft response code 560484.

560484 484 Invalid number format. SBC rejected the call

  • Microsoft response code: 560484
  • SIP response code: 484
  • Suggested actions:

    • Review the tenant's call records that contain CallEndSubReason = 560484. Look for trends in the called numbers, including the called numbers distribution by country/region. You can identify patterns that suggest that you should either establish additional normalization rules for extension-based dialing or follow up about user education.

      In some cases, these failures can be ignored because the user is dialing an invalid number. In other cases, the SBC could cause these failures because of a missing configuration in a call transfer scenario (CallType = ByotOutUserForwarding).