IOS software release train 12.0SC will reach End of Engineering with Cisco IOS software release 12.0(16)SC. End of Engineering means that there will be no more scheduled maintenance releases for 12.0SC. Ongoing support for functionality in the 12.0SC release train is available in the 12.1EC release train. The migration path for customers requiring bugfixes to 12.0SC releases is the 12.1EC release train. All the functionality in 12.0SC has been put into the 12.1EC release train. Since 12.0(16)SC is the last maintenance release, Cisco IOS Software Release 12.0(15)SC is the last 12.0SC maintenance release that is orderable.