/mcpwas taken out of service intentionally, bring the node back into service. Reason Code - Enum Definitions Enum Definitions - LocalApplicationID Value Definition 100 CallManager Enum Definitions - RemoteApplicationID Value Definition 100 CallManager Error Message %UC_CALLMANAGER-1-CMVersionMismatch: %[RemoteAppProtocolVersion=String] [LocalAppProtocolVersion=String][RemoteNodeId=UInt][RemoteAppId=Enum] [RemoteAppVersion=String][AppID=String][ClusterID=String][NodeID=String]: One or more Unified CM nodes in a cluster are running different Unified CM versions. Explanation This alarm indicates that the local Unified CM is unable to establish communication with the remote Unified CM due to a software version mismatch. This is generally a normal occurrence when you are upgrading a Unified CM node. Recommended Action The alarm details include the versions of the local and remote Unified CM nodes. Compare the versions and upgrade a node if necessary. Reason Code - Enum Definitions Enum Definitions - RemoteAppId Value Definition 100 CallManager 200 CTIManager 300 CMI Error Message %UC_CALLMANAGER-2-BChannelOOS: %[ChannelKey=String][DeviceName=String][Reason=Enum] [ChannelId=UInt][AppID=String][ClusterID=String][NodeID=String]: The B-channel is out of service. Explanation The B-channel indicated by this alarm has gone out of service. Some of the more common reasons for a B-channel to go out of service include: Taking the channel out of service intentionally to perform maintenance on either the near-end or far-end; Losing T1/E1/BRI cable connectivity; When the MGCP gateway returns an error code 501 or 510 for a MGCP command sent from Unified CM; When the MGCP gateway doesn't respond to an MGCP command sent by Unified CM three times; When a speed and duplex mismatch exists on the Ethernet port between Unified CM and the MGCP gateway. Recommended Action Check the Cisco CallManager advanced service parameter, Change B- channel Maintenance Status to determine if the B-channel has been taken out of service intentionally; Check the Q.931 trace for PRI SERVICE message to determine whether a PSTN provider has taken the B-channel out of service; Check the connection of the T1/E1/BRI cable; Reset the MGCP gateway; 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 159/343