Cisco Cisco Unified Contact Center Enterprise 9.0(2) インストールガイド

Similarly, if you want to upgrade to use IPCC Gateway with IPCC Express, you would need
the same applications, but when installing Cisco CRS, you would choose IPCC Express as the
product instead of IP IVR, and you need Cisco Agent Desktop 6.1. (See 

Cisco IPCC Gateway Deployment Guide ICM/IPCC Enterprise Edition Release 7.0(0), IPCC Express Release 4.0(0) Releases 7.0(0) and 4.0(0)