VoIP: Training providers, information, questions and answers

There are several VoIP providers in Switzerland. These include, for example, the following VoIP providers:

• iWay
• phonestar
• Green
• It factory
• sipcall
• Telephoenix
• Skype
• VoiPBuster

Of course, this also includes the usual telephone providers such as VoIP Swisscom.

VoIP telephony is a technology that enables telephone calls to be made via the Internet. Voice communication via the Internet is made possible by the network protocol. In VoIP architecture, IP (Internet Protocol) is the basis for the connection to the Internet via the IP address of Internet-enabled devices. This is used to send data back and forth between end devices.

With VoIP you save on telephone costs and benefit from many other functions such as video conferencing or instant messaging. VoIP works free of charge from VoIP to VoIP. However, if you make calls in the normal telephone network, there are low costs. You don't need a telephone for VoIP, but you do need an Internet-capable end device and a good Internet connection. Use is therefore possible with:

• PC (e.g. with VoIP software telephone - also called softphone, to connect normal telephone functions to the computer)
• Laptop
• IP telephone (telephone with data transmission via the Internet, connection via LAN port to router)
• Analog telephone with analog telephone adapter (ATA) or ISDN telephone adapter (ITA) for connection to the DSL modem
• Smartphone (via VoIP app)

All you need to set up VoIP is a router and Internet access.

The connection with VoIP technology is the connection via the DSL router or a VoIP-capable cable modem with the broadband connection of the Internet. To establish the connection, the SIP (Session Initiation Protocol) is required with a SIP address, which is used for identification. With VoIP Switzerland, the VoIP application also digitizes the audio signal recorded with a microphone. The telephone call data is sent in the form of data packets via an Internet line. The coding (codec) used is decisive for the voice quality. After transmission, the data is decoded and converted back into speech. Here, delay fluctuations (jitter) are also decisive for the voice quality of the telephone.

VoIP is the abbreviation for Voice over IP. According to VoIP Wiki, this refers to Internet telephony (IP telephony or Internet Protocol telephony). With this technology, the system is linked to the broadband with IP connections - traditionally this was done with ISDN variants.

VoIP Meaning is telephony over the Internet via VoIP telephone. This means that the conventional telephone network is dispensed with and the Internet is used instead. The voice is converted and the VoIP application digitizes the audio signal, sends it in data packets and translates the data back into voice at the destination.