Explanation
The invalid deployment option for Cisco Unified Contact Center Express is two Cisco Unified Contact Center Express clusters, each with two nodes, connected to the same Cisco Unified Cisco Unified Communications Manager cluster. This option is not supported because Cisco Unified Contact Center Express does not allow multiple clusters to share the same Cisco Unified Communications Manager cluster. Each Cisco Unified Contact Center Express cluster must have its own dedicated Cisco Unified Communications Manager cluster1.
The other options are valid deployment options for Cisco Unified Contact Center Express:
A two-node Cisco Unified Contact Center Express cluster connected to a Cisco Unified Communications Manager cluster. This option is supported and provides high availability and redundancy for both Cisco Unified Contact Center Express and Cisco Unified Communications Manager. A two-node Cisco Unified Contact Center Express cluster consists of a primaryand a secondary node that can synchronize data and take over the call processing in case of a failure2.
A one-node Cisco Unified Contact Center Express cluster connected to two Cisco Unified Communications Manager clusters. This option is supported and provides redundancy for Cisco Unified Communications Manager. A one-node Cisco Unified Contact Center Express cluster consists of a single node that handles all the call processing and administration functions. A one-node Cisco Unified Contact Center Express cluster can connect to two Cisco Unified Communications Manager clusters using the Intercluster Lookup Service (ILS) feature3.
A one-node Cisco Unified Contact Center Express cluster connected to a Cisco Unified Communications Manager Express router. This option is supported and provides a cost-effective and simplified solution for small and medium-sized businesses. A one-node Cisco Unified Contact Center Express cluster can connect to a Cisco Unified Communications Manager Express router using the Skinny Client Control Protocol (SCCP) or the Session Initiation Protocol (SIP)4.
References: 1: Cisco Unified Contact Center Express Solution Reference Network Design, Release 12.5(1) - Unified CCX Deployment Models [Cisco Unified Contact Center Express] - Cisco 2: Cisco Unified Contact Center Express Solution Reference Network Design, Release 12.5(1) - Unified CCX Deployment Models
[Cisco Unified Contact Center Express] - Cisco 3: Cisco Unified Contact Center Express Solution Reference Network Design, Release 12.5(1) - Unified CCX Deployment Models [Cisco Unified Contact Center Express]
- Cisco 4: Cisco Unified Contact Center Express Solution Reference Network Design, Release 12.5(1) - Unified CCX Deployment Models [Cisco Unified Contact Center Express] - Cisco