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Cisco ip phone need an IP address to run and a Voice gateway router to route the call
it acts as the control and signalling provider (like Comm Central)
Cisco CallManager is one of Cisco System's many enterprise-level communications solutions. CallManager is a telephony system for enterprise operations that require a feature-rich phone service with minimal additional equipment and simplified scalability. CallManager also features a number of optional configurations to fit your business's needs.
As the core of the Cisco Collaboration portfolio infrastructure, Cisco Unified Communications Manager is a unified communications call control platform that can deliver the right experience to the right endpoint.
Cisco Unified Communications Manager provides services such as session management, voice, video, messaging, mobility, and web conferencing.
Features and Capabilities
Reliability
Lower cost of ownership
Interoperability and standards support
Scalability for up to 40,000 users, extensible to 80,000 users
This powerful solution can help:
Extend video capabilities to your employees through a single, unified communications infrastructure from the desktop to telepresence rooms
Simplify voice systems with unified communications to cut costs and dramatically simplify provisioning and maintenance
Build productivity with comprehensive unified communications to help workers communicate and work more effectively
Enable mobility with embedded unified mobility software capabilities to keep workers productive wherever they are, with any content type, on any device
Improve collaboration -simply click to begin an IM session, initiate a phone call, or easily start a video-conferencing call
Cisco Unified Communications Manager is available in a choice of deployment models: public cloud, private cloud, on-premises, remote, or hybrid.
Communications Applications for Every Need
Cisco offers a variety of call-processing applications and phones that can help:
Enhance mobility: Cisco Unified Mobility keeps you in touch no matter where you work.
Keep communications at your fingertips: Explore the inviting, simple-to-use, fully featured Cisco Unified IP Phones. (PDF - 2.41 MB)
Manage communications with a single server: Cisco Business Edition provides medium-sized organizations everything they need for voice, video, mobility, and messaging.
