/mcpin the Service Parameter Configuration window in Cisco Unified CM Administration so that the value can be validated against the accepted range of values for this field. Recommended Action Verify that the Cisco Messaging Interface service parameter Parity is set to a valid (allowable) value Error Message %UC_CMI-5-SMDIMessageError: %[InvalidDN=String][AppID=String][ClusterID=String] [NodeID=String]: SMDI message contains invalid DN. Explanation Some voice messaging systems send SMDI messages to Cisco Unified Communications Manager (Unified CM) with an invalid DN specifically for the purpose of verifying that Unified CM is functioning properly. In such cases, if the Validate DNs service parameter is set to True, CMI triggers this alarm because the DN cannot be found in the Unified CM database. Recommended Action Verify that the Cisco Messaging Interface service parameter Validate DNs is set to false Error Message %UC_CMI-5-SMDICmdError: %[SMDICmd=String][AppID=String][ClusterID=String] [NodeID=String]: CMI receives an invalid incoming SMDI message. Explanation There are two kinds of incoming messages that Cisco Unified Communications Manager can accept from the voice messaging system; they are OP:MWI(SP)nnnnnnn!(D) and RMV:MWI(SP)nnnnnnn!(D) (where:nnnnnnnnnn = station number (can be 7 or 10 digits), (D) = End Of Transmission, (SP) = space). The first message activates the message waiting indicator (MWI). The second deactivates the message waiting indicator. CMI triggers this alarm if the received MWI message doesn't have one of the acceptable formats as described. Recommended Action Contact the vendor of the third-party voice messaging system and discover why it is sending SMDI message with an invalid format Error Message %UC_CMI-1-SerialPortOpeningError: %[OpeningError=String][AppID=String][ClusterID=String] [NodeID=String]: When CMI tries to open the serial port, the operating system returns an error. Explanation For a system running CMI, the serial port through which the voice messaging system is connected is always USB0, and that value is configured in the Cisco Messaging Interface service parameter, Serial Port. It is possible that the Serial Port value has been updated via AXL or a CLI command where validation of the value was not performed. CMI triggers this alarm if the value in the Serial Port service parameter is anything other than USB0. Recommended Action Ensure that USB0 is configured in the Cisco Messaging Interface service parameter Serial Port. Also, physically confirm that the cable is firmly connected to the USB0 port. Error Message %UC_CMI-3-SerialPortGetStatusError: %[GetStatusError=String][AppID=String][ClusterID=String] [NodeID=String]: When CMI tries to get the status of serial port, the operating system returns an error. Explanation CMI triggers this alarm when it can't get the status of the serial port. An inability to receive serial port status information could be caused by a loose or disconnected USB cable. Recommended Action Make sure that the cable connecting the USB0 port and voice messaging system is firmly connected. 5/24/26, 3:34 AM System Error Messages for Cisco Unified Communications Manager 15 - Cisco https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/err_msgs/15_x/ccmalarms15.html 2/343