UCS220-M3 will be end of life December 31, 2021
https://www.cisco.com/c/en/us/products/collateral/servers-unified-computing/ucs-c-series-rack-servers/eos-eol-notice-c51-737442.html
For CUCM,Unity Connection you also need to include SWSS.You can learn more from the below link.
https://www.cisco.com/c/en/us/services/collateral/se/support-service-qa.html
What benefits will I receive from the SWSS offering?
A. SWSS provides your business with the following benefits:
● Major releases protect your software investments as long as the software support contract remains active.
● Specialized engineers in the award-winning Cisco TAC are available 24 hours a day to analyze software questions and assist with incident remediation to help you maintain application availability.
● Maintenance and minor software releases help reduce risks through bug fixes and security updates, and make sure Cisco software applications are always up to date and perform as expected.
● Increased knowledge and productivity help reduce costs and are essential to reducing the time it takes to resolve a problem. Cisco’s extensive online resources and troubleshooting tools help answer frequently asked questions, increase your IT staff’s expertise, and provide quick access to the latest software releases.
Does SWSS cover the Operating System (OS) software on a hardware device?
A. No, OS software is covered under a Cisco Smart Net Total Care
® contract. Learn more about
Smart Net Total Care.