/mcp© 2026 Cisco and/or its affiliates. All rights reserved. Page 5 of 34 Cisco NFVIS-for-UC (Network Function Virtualization Infrastructure Software) Cisco NFVIS (Network Function Virtualization Infrastructure Software) is a hypervisor product from Cisco's Enterprise Network Function Virtualization (Enterprise NFV)) portfolio. It is a special-purpose Linux/KVM- based virtualization layer for deploying select application workloads on select Cisco hardware. Cisco NFVIS-for-UC is a special edition of NFVIS, a new commercial offering with a separate product ID, distinct pricing, new licensing, and a slightly different admin User Interface. Cisco NFVIS-for-UC supports only select On-premises Calling Applications. Cisco NFVIS-for-UC supports only select Cisco Calling Appliances. For more information on the base Cisco NFVIS from Cisco Enterprise NFV, see the following: ● Optimize the virtualization layer ● Cisco Enterprise NFV Infrastructure Software For more information on Cisco on-premises calling applications support on Cisco NFVIS-for-UC, see Virtualization Requirements for Cisco NFVIS-for-UC. Applicable Applications and Versions This document applies to the following: ● Version 15SU4 of UCM, SME, IMP, CUC, CER ● Version X15.4 of Cisco Expressway Series ● The Enhanced Survivability Node of Webex Calling dedicated instance (“DI ESN”) is also supported; its virtualization requirements are described here: Link Sections of this document may use the following categories of applications: ● Core Cisco Calling (UCM, SME, DI ESN, IMP, CUC, CER, Expressway). Broader “Cisco Calling” may also include PCD, CUACA, and CPS. ● Other Cisco (applications that are Cisco but not part of Cisco Calling, for example, meetings/contact center applications, virtual network functions (VNF’s) like Catalyst 8000V or security workloads like Cisco Identity Services Engine ISE). ● 3rd party (customer-provided non-Cisco applications) ● Customer-homegrown (customer-produced/-provided applications). Physical Hardware Categories Cisco on-premises Calling applications use the following categorizations of compute and storage hardware in this guide: Cisco Calling Appliances ● Cisco Business Edition 6000 (BE6000 or BE6K) ● Cisco Business Edition 7000 (BE7000 or BE7K)