Optical fibre availability at your address 

Unsure if your Internet is working properly? Check how to measure your Internet speed: 

My Swisscom app:
The My Swisscom app shows you the current performance speed and gives you practical tips for increasing it. 
Measure Internet speed

Web portal of the Internet-Box 
Internet-Box web portal: you can also measure the speed between the Internet-Box and the Internet in your Internet-Box web portal. To do this, enter 192.168.1.1 in the browser field or http://internetbox.swisscom.ch and perform a speed test. Please note that you only have access to the Web portal when your home network is connected to your Internet-Box.

Note that with a browser-based speed test such as Speedtest.net, the values measured are heavily dependent on the browser. Swisscom therefore recommends testing via the My Swisscom app or the web portal of the Internet-Box. If you would still like to use one of these speed tests, do the following to maximise accuracy:

1. Install the latest version of your browser.
   
2. Close all other programs.
   
3. Connect your computer to the router with the network cable. 
4. Switch off your TV-Box (if present).

The speed that can be achieved when using a service on your smartphone, PC, tablet etc. depends on two factors:

• The connection between your device and the Internet-Box.
  The performance of this connection can be improved by optimising your home network (for example, by using the latest CAT 6 cables, faster switches and WLAN boxes). In the end, however, the device will be limited by the maximum speed it is able to achieve – many older laptops, for example, will only be able to achieve speeds of 100 Mbit/s over the Ethernet interface.
  
• The connection between your Internet-Box and the Internet destination
  As well as your Internet subscription, your Internet performance also depends on other factors, such as network congestion. If you want to download a file from the servers of an online storage service provider, for example, and that service provider only provides 10 Mbit/s bandwidth for the download, the perceived performance is only 10 Mbit/s, although your line could reach much higher speeds.
  
  

Also note that some of the data (approximately 15%) is there to ensure transmission quality. This reserved bandwidth cannot be used to transmit content (such as photos, movies or music). 8 Gbit/s is the maximum usable speed for all devices in the home network together (including WLAN). 

The maximum achievable speed for one device over the fastest Ethernet connection (Internet-Box 4) is 8 Gbit/s. When uploading and downloading simultaneously, the speed may be limited to 6 Gbit/s.

Even with the fastest Internet subscription, the speed will always be limited by the capacity of the home network and the device on which the measurement is made.

For example, an older computer that is connected correctly to the Internet-Box by an Ethernet cable and is included in the 10 Gbit/s subscription will only be able to achieve the data transfer speeds that its Ethernet port supports.

Note: The cnlab Speedtest for measuring speeds > 1 Gbit/s will be available from Q2/2020. The maximum speed that can be measured by an external speed test is 2.3 Gbit/s with an Internet-Box 3 connected to the 2.5 Gbit/s port with an Ethernet cable. When uploading and downloading simultaneously, the speed may be limited to 6 Gbit/s.