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Telephone Systems / Cisco

Cisco Unified Communications Manager (CUCM / CallManager)

Cisco Unified Communications Manager (CUCM), also known as CallManager, is Cisco’s flagship platform for IP telephony and unified communications management. It enables centralized administration of thousands of users, devices, and services for voice, video, and messaging. It is ideal for organizations that require maximum scalability, security, and availability.

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Cisco Unified Communications Manager (CUCM / CallManager)

Main features

  • Scalability from fewer than 100 to 80,000 users per cluster.
  • Supports multiple protocols: SIP, SCCP, H.323, MGCP.
  • Integration with Cisco Webex, Microsoft Teams (via gateways), and enterprise CRMs.
  • Centralized management with high availability and redundancy.
  • Compatible with Cisco IP Phones (7800, 8800, DX), softphones, and video endpoints.

Technical specifications

Users

Up to 80,000 per cluster

Protocols

SIP, SCCP, H.323, MGCP

Integrations

Webex, Microsoft Teams, CRM

Deployment

Physical servers, virtual (VMware), or hybrid cloud

High Availability

Redundant clusters and load balancing

About the brand

Cisco Systems is a global leader in networking and telecommunications. CUCM is the foundation of its collaboration ecosystem, trusted by corporations, governments, and large organizations worldwide.

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