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 ?
This double Class of Service bonus offer is part of a year-long celebration of events and promotions for SkyMiles members and Delta employees, all in recognition of Delta's frequent flyer program turning 20 this year.
With MPLS class of service over DSL, businesses can hold down their monthly communications costs while optimizing use of high-speed, low-cost DSL access commonly used for wide area networks.
Instead, they should be looking for interim services that are cost effective, demonstrate reliable and predictable performance, and offer Class of Service.
To profit from this market uptake, providers need tools that enable the automation of service activation and delivery, seamless management of multiple protocols and differentiation of services with enhanced functionality such as customer self-service, class of service and advanced security.
The support for Gigabit throughput provides carriers and service providers with a competitive edge and rapid ROI by allowing deployment in central hub locations and enabling an array of new revenue-generating services such as tiered services, class of service and usage-based billing.