Transmission of voice and data on private connections (PSTN / ISDN or VoIP) / Number and duration of calls

Fixed telephony traffic has been is steadily declining since liberalisation in 1998. The phenomenon of substitution between "fixed networks" and "mobile networks" continues and explains, in large part, this decline. The number of calls, their duration and their average duration broken down into different categories is shown below.

Transmission of voice and data on private connections (PSTN / ISDN or VoIP) (Table SF3A)
  2017 2018 2019 2020 prov. Var. 19-20
2'095 1'793 1'651 1'511 -8.4%
National (urban and long-distance zone) 1'236 1'064 954 778 -18.4%
International 158 97 89 72 -19.3%
From fixed network to mobile network 655 567 542 599 10.5%
From fixed network to indeterminate network (fixed or mobile) 46 65 66 63 -5.0%
9'015 7'379 6'653 7'274 9.3%
National (urban and long-distance zone) 5'770 4'775 4'231 4'479 5.9%
International 960 697 596 544 -8.6%

From fixed network to mobile network

2'134 1'764 1'678 2'109 25.7%

From fixed network to indeterminate network (fixed or mobile)

152 143 148 142 -4.5%
4.30 4.12 4.03 4.81 19.4%
National (urban and long-distance zone) 4.67 4.49 4.44 5.76 29.8%

International

6.08 7.21 6.72 7.61 13.2%
From fixed network to mobile network 3.26 3.11 3.10 3.52 13.7%
From fixed network to indeterminate network (fixed or mobile) 3.28 2.21 2.23 2.25 0.5%
Note:
- In this table the sums do not always correspond exactly with their constituent elements. These small differences are due to rounding up or down.

Duration of calls (in millions of minutes)

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Transmission of voice and data on private connections (PSTN / ISDN or VoIP) / Distribution as a function of the use or non-use of preselection and access by "Voice over Internet Protocol" (VoIP) (Table SF3B)
  2017 2018 2019 2020 prov. Var. 19-20
2'095 1'793 1'651 1'511 -8.4%
Calls established directly (without prefix) 549 232 118 204 72.8%
Calls established indirectly (with prefix) 99 12 24 13 -46.9%
Calls established via a VoIP access 1'401 1'484 1'442 1'232 -14.6%
Other 46 65 66 63 -5.0%
9'015 7'379 6'653 7'274 9.3%
Calls established directly (without prefix) 3'066 1'612 1'007 1'075 6.7%
Calls established indirectly (with prefix) 344 29 40 35 -13.0%
Calls established via a VoIP access 5'453 5'594 5'457  6'023 10.4%
Other 152 143 148 142 -4.5%
4.30 4.12 4.03 4.81 19.4%
Calls established directly (without prefix) 5.59 6.94 8.54 5.27 -38.3%
Calls established indirectly (with prefix) 3.49 2.41 1.68 2.76 63.9%
Calls established via a VoIP access 3.89 3.77 3.78 4.89 29.3%
Other 3.28 2.21 2.23 2.25 0.5%
Notes:
- In this table, the sums do not always correspond exactly with their constituent elements. These small differences are due to rounding up or down.
- Voice over Internet Protocol (VoIP) is a generic name defining the transportation of voice traffic using packets on the Internet Protocol (IP). VoIP traffic can be routed on a controlled private network or the public internet or a combination of the two.

Our statistics collect information (contracts, number and duration of calls) on customers accessing a telephony service via VoIP access provided by a telecommunications service provider. Other forms of VoIP cannot be collected by our statistics, e.g. PC to PC (Peer to Peer) where it is sufficient to download the appropriate program on the internet and make contact with a peer who has installed the same program.

Number of calls established (in millions of calls)

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Specialist staff
Last modification 08.11.2021

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