Cisco Software Support Service SWSS Essential Operate Services
Cisco Software Support Services (SWSS) provide 24x7 Access to the Cisco TAC, along with Cisco Software Upgrades and Updates.
Cisco SWSS is required to provide Licence Portability for Cisco ONE Software.
Cisco Essential Operate Service (ESW) and Unified Communications Software Subscription (UCSS) have been replaced by Cisco Software Support Services (SWSS).