All IP Technology

What is the technical background of IP technology?

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On December 31, 2017, 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 concerning IP technology:


  • IP is the acronym for “Internet protocol.” It is a technical directive for the exchange of data over the Internet. With All IP, the connection between the call participants is only fixed and physical at the end points, meaning from the caller to the provider's first transmission point. The connection between the providers' transmission points, however, is no longer a fixed connection. Data is transmitted over the best available path in the network. To ensure that data “reunites” at the end, rules – such as the “Internet protocol” – are needed. The Internet protocol itself, on the other hand, encompasses around 500 different network protocols. These are often also referred to as TCP/IP protocols and are the foundation of network communications.
  • No, because Sunrise networks are not the public Internet. Instead, they are private data networks that are not available to the public.
  • Simply put: The spoken words are continuously bundled into data packets. The Internet protocol assigns “delivery instructions” to these data packets and sends them into the network through the connection line. There, a packet independently makes its way to the recipient (server) – always taking the best route. This makes data transmission via IP much more reliable than traditional transmission through fixed connections. If a data path to a certain destination fails – which could happen for many technical reasons –, the packet will automatically seek out an alternate route through the network.
  • There is really nothing new. The technology has been around for more than 30 years and is mature today. For years, Sunrise has been transmitting voice exclusively over private data networks, using IP. Most voice connections newly activated over the past few years already use this technology. Only old services based on Swisscom connections will have to be converted over. The technical infrastructure (wiring, router, etc.) in use today offers voice transmission quality equal to or even better than that of the current landline network.
  • Literally, it means “Voice over Internet protocol.” Put simply, it's making calls via the Internet protocol, VoIP for short. Once Swisscom deactivates the traditional landline network in Switzerland, voice transmissions will be done exclusively over VoIP.
  • That is the technical abbreviation for the old-generation landline network: Time-division multiplexing refers to the process that always keeps several direct connections or lines between two participants open. This ensures that several calls can be made simultaneously.
  • It stands for “session initiation protocol” which works in the background – before you hear the dial tone – and manages the connection set-up between two terminals or the telephone software of two participants in a call. Customers dial a phone number as usual.
  • This is a technical rule for the continuous transport of audio and video data. It ensures that the voice is transmitted interference-free and in good quality when you make a phone call.
  • That is the classic telephone network that will be deactivated in Switzerland at the end of 2017. When it was first developed, a call would be cut off when a connection between two phones became disconnected. Later, there were telephone switchboards where an “operator” would establish connections manually by pulling and plugging cords. At the end of the 19th century, automatic switchboards became widespread in the telephone network.
  • The telecommunications networks that have been in use, especially through traditional telecom providers, work on the basis of a fixed connection between two call participants. This approach is changing with the Next-Generation Network (NGN). The NGN is the new, standardized network infrastructure for all telecommunications providers in Switzerland. It is the All-IP network. It will standardize the entire infrastructure on the basis of IP technology with packetized transmissions and is no longer dependent on a fixed connection or line. Data packets independently find their way through the network using their address information. Sunrise has been using this modern technology for several years now.
  • It goes without saying that the integrated services digital network (ISDN) is indeed a digital network. In principle, however, it works just like the traditional analog network, meaning a direct connection between call participants always has to be established. The difference is that voice signals are transmitted digitally. With the deactivation of the traditional landline network, ISDN is just as outdated as analog calling.
  • All VoIP solutions offered by Sunrise are based on the phone number principle. Unlike with traditional calling, however, these phone numbers are no longer tied to a physical location. They can be used with any Internet-capable terminal with VoIP software. This means that you can be reached anywhere in Switzerland and can make phone calls from this number no matter where you are.
  • In general, you will need a microphone, speaker, or headset. And the appropriate software. And a phone number.
  • We anticipate a bandwidth of 100 kbit/s for uploading and downloading per simultaneously placed phone call. This means that if 500 calls were made simultaneously from the same network to external numbers, the bandwidth necessary would be about 5.0 Mbit/s (symmetrical). Therefore, bandwidth is not a problem when it comes to most Internet connections; what's more important is the quality of service. To visualize this, just imagine that voice data packets need the “right of way” on the network – from the caller to the recipient.
  • Unlike traditional phone systems (often also called PBX), cloud phone systems do not consist of hardware that is installed on-site. Business cloud PBXs are servers located at our Sunrise computer centers. Your own telephone system is set up virtually for you on these servers with all of your phone numbers and features. The Business cloud PBX from Sunrise is comprised of three parts: The virtual phone system itself with its phone numbers and rate plan, the connection of the customer's location over an Internet connection (whenever possible with quality of service), and the integration of the Business cloud PBX itself into the customer network.
  • You don't have to invest in any expensive systems. IP systems are scalable and flexible, business processes can be accelerated with software and multiple communication channels can be linked. During a video conference, for example, you can work on a document together with a colleague. Your phone number is no longer tied to a specific terminal at a location or network. Instead, it is associated with you. Consult with our IP and business process specialists at Sunrise to get the greatest benefit from full-scale IP communications.
  • Get rid of your old telecommunications infrastructure. With IP you can simplify your infrastructure and reduce costs. All-IP will also allow you to improve productivity, for example by reducing the number of ghost calls or by integrating calling and video conferencing into workflows. Our Sunrise specialists will be glad to assist you.