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NOTE:

• If the error response is any of 401, 407, 408, and 7xx, the

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  exhibits the default characteristics even if the parameter is enabled.
• When this parameter is disabled (as the default behavior), and the

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  gets an error response for the REFRESH REGISTER, it changes the RCB state from REFRESHING to TERMINATED and starts a 64 second timer.
  • If the

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    receives a Re-REGISTER request (REFRESH or UPDATE) within the next 64 seconds, it does not relay the request to the Registrar
  and
  • .
  • Instead, it locally responds to the UE with the previously preserved error message (because the RCB state is TERMINATED). However, if the

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    receives an Un-REGISTER request from the UE within
  the
  • 64 seconds, it deletes the information about the earlier registration failures
  ,
  • and allows the next REGISTER attempt to go through. 
• When this parameter is enabled , on receiving and the

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  receives an error response for REFRESH REGISTER attempts, the

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  it sets the RCB state to COMPLETED instead of TERMINATED. On receiving subsequent REFRESH REGISTER requests, instead of locally relaying the previously stored error message to the UE, the the 

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  relays the REFRESH REGISTER request to the Registrar. In general, whenever the RCB is COMPLETED, the

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  relays the REFRESH REGISTER requests to the Registrar.