What are two specifications for UC on UCS Tested Reference Configuration (TRC)?

= UC on UCS Tested Reference Configuration (TRC) is a type of deployment option for Cisco Unified Communications applications on Cisco Unified Computing System (UCS) servers. TRC is defined as Configuration Based, which means that it specifies the exact hardware configuration, including server model, CPU, memory, disk, RAID settings, BIOS settings, and network adapters. TRC also requires VMware vSphere as the virtualization software, and does not support any other hypervisor. VMware vCenter is not required for TRC, but it is recommended for managing multiple ESXi hosts. TRC is different from Specs-based, which is defined as Rule Based, and allows more flexibility in choosing the hardware components, as long as they meet the minimum requirements and follow the rules defined by Cisco. Specs-based also supports other hypervisors besides VMware vSphere, such as Microsoft Hyper-V and KVM. References :=

Troubleshoot UC on UCS TRC, UC on UCS Specs-based, and 3rd-party Specs-based Deployments1

Collaboration Virtualization Sizing2

Unified Computing System Hardware3

What to select - Cisco BE6000 or UC-on-UCS45