ISDN Shut Down

What does the shutdown of ISDN mean for your company?


In 2018 the traditional landline network (analog, ISDN) will be deactivated across Switzerland. It will be replaced by All IP, a standardized next-generation network for every type of communication and data exchange.

We answer the most common questions about the ISDN shutdown her:

  • Swisscom is in the process of phasing out the old analog and ISDN phone lines. This was planned and announced for the end of 2017. Since February 1, 2018, some exchanges have also been completely removed from the network. This means the corresponding regions are no longer supplied with ISDN. Full shutdown is expected to occur during the course of the year 2018. Existing analog and ISDN connections must be switched to IP.
  • For years, Sunrise has been transmitting voice exclusively over private data networks, using IP. Most of the voice connections activated in the past few years already use this technology, even if the telephone system is connected to an ISDN interface. Only older services relying on Swisscom connections (preselection, access rebilling) will have to be switched over.
  • Nothing really. All changes will be made “behind the scenes.” As a result of these changes, you will connect your phone system to an Internet router or a VoIP gateway instead of plugging it into a traditional phone socket.
  • Yes, with the exception of rotary dial phones. Sunrise is already using connection products with VoIP today – without the conventional landline network. This means that there is already a VoIP connection on-site that can be connected to existing devices or via a cloud-based phone solution. Existing ISDN phone systems are connected to the IP network through a VoIP gateway. State-of-the-art IP phone systems are directly connected to the IP network.
  • This is a technology that allows an IP-based phone system to manage multiple phone numbers with just one access account. With the traditional process, each terminal requires an account with user name and password for each phone number. This technology was developed to make it easier to connect phone systems to the All-IP network.
  • No, you will have to exchange them for IP phones or for a plain software-based solution to make calls from your PC.
  • Yes, you can continue to use your ISDN phone system on a Business voice direct connection until it reaches the end of its service life. The Business voice direct connection is a state-of-the-art VoIP connection. To connect your ISDN phone system, we will use a VoIP gateway with corresponding ISDN interface.
  • No, you will have to replace old, analog phone systems, ideally with a Business cloud PBX managed by Sunrise.
  • No, phone numbers will remain and will continue to be assigned to new connections and expansions. When you switch providers, you can port your existing phone numbers to Sunrise. This will ensure that your customers can reach you as usual.
  • No, modem applications were designed for traditional phone networks and work with acoustic signals, not with IP data. Sunrise recommends that you promptly get in contact with your application's supplier.
  • You can continue to operate your traditional fax machine through an IP analog converter. This will, however, reduce the reliability of your fax service. Sunrise recommends that you turn off the “error correction mode” on your fax machine and reduce the transmission speed to a maximum of 9600 bps.
  • No, today's elevator phones rely only on conventional, analog connections. We recommend that you switch to a mobile communications-based system offered by all leading elevator manufacturers. Such connections can be configured redundantly through several mobile base stations. In-house coverage can be optimized with the help of Sunrise GSM repeaters.
  • If your system transmits alarms over analog or ISDN connections, you will have to find another solution. Alarm system manufacturers have several options in their portfolios. Alarm systems that combine landline network IP and mobile communications in their transmission path are even more secure and better than the old solutions. We do not recommend analog IP converters, since they do not work reliably.
  • Yes, if a cash register supports an internet connection (WLAN, LAN). Systems that are only based on ISDN should be replaced now.
  • That's correct. It served a purpose. However, the demands placed on a telecommunications network have changed considerably since phone communication was invented at the end of the 19th century. It is no longer enough to set up a voice connection. The network has to offer a variety of different functions at a good price. Users want to speed up processes, optimize procedures and link information without having to worry about their source: An audio recording with a Word file, a video conference with an Excel file, or an e-mail with voice mail. They want to be able to work everywhere, be available, and take their own personal switchboard with them on their smartphones. All-IP combines all these demands into one – one that advances companies, employees, and all people. And, lastly, business as well: All-IP is a prerequisite for the digitalization of the Swiss economy and for Industry 4.0.