Cisco’s Call Manager system is the call-processing software component of the Cisco IP telephony solution.
Designed for big business, it is a scalable, distributable, highly available IP call processing system.
It can group multiple servers and manage them as a single entity.
The solution can include:

Advantages:
- Provides a scalable and highly available system (over a million users on an 100-site system)
- IP phones and gateways offer advanced services such as call waiting, call forwarding or transfer, teleconference, speed dialing and much more.
- Web interface with the configuration data base allows for remote configuration of installations and systems with a easy-to-use browser