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.
Business Telecom Advisors, Inc
As a comprehensive resource for all your telecommunications solutions, Business Telecom Advisors (BTA) acts as your advocate for telecom-related issues and challenges. As experts in the telecommunications industry, our goal is to address and solve the voi
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