/mcpCheck the speed and duplex settings on the Ethernet port. Reason Code - Enum Definitions Enum Definitions - Reason Value Definition 0 None Defined Error Message %UC_CALLMANAGER-5-BChannelISV: %[ChannelId=UInt][ChannelKey=String][DeviceName=String] [AppID=String][ClusterID=String][NodeID=String]: B-channel is in service. Explanation The B-channel indicated by this alarm has gone in service Recommended Action Informational purposes only; no action is required Error Message %UC_CALLMANAGER-2-DChannelOOS: %[ChannelId=UInt][ChannelKey=String][DeviceName=String] [IPAddress=String][Reason=Enum][AppID=String][ClusterID=String][NodeID=String]: The D-channel is out of service. Explanation The D-channel indicated by this alarm has gone out of service. Common reasons for a D-channel to go out of service include losing T1/E1/BRI cable connectivity; losing the gateway data link (Layer 2) due to an internal or external problem; or a gateway reset. Recommended Action Check the connection of the T1/E1/BRI cable; reset the gateway to restore Layer 2 connectivity; investigate whether the gateway reset was intentional. If the reset was not intentional, take steps to restrict access to the Gateway Configuration window in Cisco Unified CM Administration and the gateway terminal. Reason Code - Enum Definitions Enum Definitions - Reason Value Definition 0 None Defined Error Message %UC_CALLMANAGER-5-DChannelISV: %[ChannelId=UInt][ChannelKey=String][DeviceName=String] [IPAddress=String][AppID=String][ClusterID=String][NodeID=String]: D-channel is in service. Explanation The indicated D-channel has gone in service Recommended Action Notification purposes only; no action is required Error Message %UC_CALLMANAGER-4-DeviceTransientConnection: %[{Optional}IPAddress=String] [{Optional}DeviceName=String][{Optional}MACAddress=String][Protocol=String] [{Optional}DeviceType=Enum][{Optional}Reason=Enum][ConnectingPort=UInt] [{Optional}SIPUser=String][{Optional}IPV6Address=String][{Optional}IPAddrAttributes=Enum] [{Optional}IPV6AddrAttributes=Enum][AppID=String][ClusterID=String][NodeID=String]: A device attempted to register but did not complete registration. Explanation A connection was established and immediately dropped before completing registration. Incomplete registration may indicate that a device is rehoming in the middle of registration. The alarm 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 160/343