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How to Understand the Speed of the Internet Connection?

Commonly available speed does not mean the same as the advertised speed.
What is considered as deviations?
BCO has prepared a clear scheme of what the individual terms mean according to the CTO methodology.

List of territorial coordinators:

Map of visited municipalities:

Interactive coverage map

Specification of the Internet Access Service at a Fixed Location

In August, the CTO issued an amended version of the general authorisation VO-S/1/08.2020-9,

effective from 1 January 2021, according to which the speed parameters of Internet connection services must be derived from the advertised speed. This will give users a better idea of what they can actually expect from the service offered. This will not only lead to a better understanding of the offers by users, but above all to the fact that the services actually provided will better correspond to the advertised offers.

Example: If the provider offers an Internet access service at a fixed location with an advertised speed of 100 Mb/s, the value of the commonly available speed will have to be set in the contract at a specific value higher than or equal to 60 Mb/s, and the minimum speed at a higher value or equal to 30 Mbit/s.

As an example, suppose that in a specific contract (for a service with an advertised speed of 100 Mbit/s), the commonly available speed is set at 80 Mbit/s and the minimum speed at 50 Mbit/s. A large lasting deviation, establishing the possibility to complain about insufficient quality of service, would then be defined as a decrease in the actually achieved speed below 80 Mbit/s continuously for more than 70 minutes. A large recurring deviation would be defined as a decrease in the actually achieved speed below 80 Mbit/s three times, each time for at least 3.5 minutes, in a time period of 90 minutes. Any decrease in the actually achieved speed below 50 Mbit/s (i.e. below the set value of the minimum speed) would then be defined as a service failure.

(Source: CTU, 23/09/2020 – https://www.ctu.cz/en/print-report-monitoring-report-92020)

For easier reference regarding the issue, the following illustrative explanatory picture has been prepared by BCO (available in Czech only):

We thank the Academy of Fibre Optics and Optical Communications for consultations

Document VO-S/1/08.2020-9 is also available at this link in .pdf format

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Brobadband Competence Offices
European Commission website on the BCO initiative

Ministry of Industry and Trade

Public consultation
MIT web portal for public consultations concerning the programme of support for the coverage of the Czech Republic by high-speed Internet connection networks within the OP EIC (Operational Programme Enterprise and Innovations for Competitiveness) programme