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Home » Glossary » Grade of Service (GoS)

Grade of Service (GoS)


What is the grade of service?

The grade of service (GoS) is one facet of a consumer’s quality while making a phone call. The Grade of Service is also the proportion of needs lost owing to congestion during the busiest hour.

The grade of service is not always identical in each direction or between different source-destination pairs. Therefore, it can be regarded separately from the perspective of incoming versus outgoing calls. 

Grade of service can refer to a measurement of inbound call center traffic to ensure that conditions are satisfied and to assess the success of consumers served.

What is the grade of service

How to calculate the grade of service?

In the telephony system, both Erlang and GoS (Grade of Service) criteria assess how well telephone traffic performs. Erlang and Grade of Service calculators use the following equation or formula.

Erlang C Calculator will tell you how many resources you’ll need to reach a specific Grade of Service level.

The Grade of Service (GoS) is a metric for determining how congested a telephone network is. A lost call situation occurs when the network is congested.

Traffic congestion in the phone network is referred to as grade of service. A lost call situation occurs when the network is congested. As a result, total traffic offered minus total traffic lost equals traffic transported.

How to keep a good grade of service?

The telecom provider usually knows the required Grade of Service for a particular product. The operator must ensure that the appropriate telecom circuits or routes are available to meet a specific level of demand to achieve and maintain a given Grade of Service.

It’s also worth remembering that having too many circuits means the operator is supplying surplus capacity that may never be used, or at the absolute least, will be significantly underutilized. It increases the costs that other sections of the network must bear. 

Telecommunications service providers utilize Traffic Tables to identify the correct number of circuits necessary.

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