Explanation
A Contact Service Queue (CSQ) is a logical grouping of agents that share similar skills and can handle similar types of contacts. A CSQ is defined by three main fields: the Resource Selection Criteria, the Service Level, and the Overflow CSQ. The Resource Selection Criteria determines how the system selects the most appropriate agent for each contact based on the agent's competency level and availability. The Service Level defines the percentage of contacts that should be answered within a specified time threshold. The Overflow CSQ specifies another CSQ to which the contacts are redirected when the current CSQ reaches its maximum capacity or when the contacts wait in the queue for too long. These three fields are essential for defining a CSQ in Cisco Unified Contact Center Express Enhanced. The other fields, such as Agent Name, Automatic Work, and CCX Application, are not used in defining a CSQ, but rather in configuring other aspects of the system, such as agent settings, workflow groups, and scripts. References: Cisco Unified Contact Center Express Design Guide, Release 11.0 (1), [Cisco Unified Contact Center Express Administration Guide, Release 11.0 (1)]
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/crs/express_11_0/configurat