Classes of Service
The system of Classes of Service (COS) helps defining rights for one or another extension in the PBX or Centrex systems. For example, few groups require more space for storing voice messages, while other need the redirection of calls to cell phones, the third does not have to make calls outside of the office network. With the help of this system one can change and configure settings.
The configuration of call queue is set in a way that the agent should pick up and answer the call, because of the forced connection the called party and the caller will be connected automatically. This function is mostly used in call service centers.
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