Cisco Unified Communication Components

1) Call Manager Express & Cisco Unified Communication Manager

--> Responsible for Call Processing

--> Registering IP Phones

--> Advanced Voice Features

2) End Points

--> End Points are IP Phones or device the user will have for communication.

---> Ex: Cisco IP Phones, Cisco IP soft phone

3)  Voice Gateway

--> Gateways are responsible for processing external calls.

---> Gateways are responsible for connecting PSTN or Service Provider

---> Ex: Cisco ISR 1800,2800,3800, Cisco UCS 520