Cucm Hardware Requirements __link__ Jun 2026

Historically, CUCM was deployed on dedicated Cisco Media Convergence Servers (MCS), proprietary hardware appliances that combined Cisco software with specific server configurations. Today, the standard deployment model is virtualized, running on VMware ESXi hypervisors. This shift has fundamentally changed how hardware requirements are defined. Cisco provides Open Virtual Appliance (OVA) templates, which act as blueprints for the virtual machine (VM) hardware allocation.

| Deployment Size | vCPU | RAM (GB) | Disk (GB) | Max Devices | |----------------|------|----------|-----------|--------------| | 1000 users | 2 | 8 | 110 | 1,000 | | 2500 users | 4 | 8 | 110 | 2,500 | | 7500 users | 6 | 12 | 110 | 7,500 | | 10k+ users | 8 | 16+ | 110+ | 10,000+ | cucm hardware requirements

Cisco Systems, a leader in networking and communications, recognized the potential of IP telephony. In 2000, they released the Cisco Unified Communications Manager (CUCM), a software-based call processing system that integrated voice, video, and data communications. CUCM was designed to provide a comprehensive, enterprise-level communication solution that could handle the complex needs of large organizations. Historically, CUCM was deployed on dedicated Cisco Media