class of service


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Related to class of service: Quality of service

class of service

(1) A classification assigned to users of a telephony network that gives them particular rights and privileges. In an internal telephone system, it can include the ability to make international calls or dial 900 numbers. In the public telephone network, it is used for tariffs and differentiates between categories such as residential or commercial, flat rate or message units, private line or party line.

(2) In an enterprise network, class of service (CoS) differentiates high-priority traffic from lower-priority traffic. Tags may be added to the packets to identify such classes, but they do not guarantee delivery as do quality of service (QoS) functions, which are implemented in the network devices. See QoS.
References in periodicals archive ?
New Edge also is extending its service level guarantees for class of service on T1 MPLS lines to DSL.
The AMCC PRS 5G and PRS 20G solutions will, for the first time, bring greater granularity and Internet class of service to smaller-capacity systems like remote access devices, enterprise networking equipment, smaller-capacity SAN systems and increasingly popular Advanced Telecom Computing Architecture (ATCA) platforms.
Specifically engineered with a Cisco Powered Network certified video Class of Service (CoS), IP Video VPN is uniquely designed to successfully operate videoconferencing as a real-time application on a global scale.