21257: Invalid SIP Manipulation Policy SIDPositive FeedbackNegative FeedbackERROR: 21257error-21257 page anchorPositive FeedbackNegative FeedbackSIP TRUNKINGERROR Descriptiondescription page anchorPositive FeedbackNegative FeedbackOperation could not be performed because the SIP Manipulation Policy SID does not exist. Possible Causespossible-causes page anchorPositive FeedbackNegative FeedbackSIP Manipulation Policy SID is incorrect. Possible Solutionspossible-solutions page anchorPositive FeedbackNegative FeedbackVerify the SIP Manipulation Policy SID is valid.