IP telephony network
Any IP-telephony network uses a data network, most often than a computer network. Voice in such networks is transmitted digitally via RTP packets, otherwise, it is called packet data transmission. Often the competitor’s companies Samsung, Panasonic, LG and others, sell telephone exchanges under the guise of digital PBX. Is it the same?
No, the only system that is digital at these stations is control system (switching), the lines and channels are basically analogs. Here it is worth mentioning that the latest versions of IP-PBX Panasonic can work with IP-telephony (though for this you will have to purchase a license package for the required number of users).
How does IP telephony work?
A voice from the handset is digitized and packed into data packets. Then each packet follows through a data network (for example, the Internet) and at the end point they merge. On the accepted side, the reverse process takes place, converting the data into a voice.
What are the differences between IP telephony and analog telephony?
Conventional telephone communications use analog communication channels. Therefore, the voice in which is transmitted by means of electrical oscillations at a certain carrier frequency. In the case of IP telephony, each packet follows its own unique route, while the losses and interference in the communication channel are not as critical and noticeable as in conventional telephony.
What do I need to use IP-telephony?
Finally, for IP-telephony, you need a set of specific network devices and methods for their interaction. The network of this telephony is based on a qualitative and properly constructed data transmission network. Gateways like in everyday life are the point of interaction of different environments (the point of crossing), that is, the transformation of different protocols and voice interfaces (GSM, E1, FXO, PRI, etc.) into IP-telephony. One should install the Softswitch in the heart of the IP network. The most popular and functional Softswitch for this is considered to be Asterisk.
Advantages of IP-telephony:
- Cheaper calls
- High-quality voice, the ability to use HD codecs
- No necessity to be bind to the workplace
- Multichannel, always free line
- Flexibility, it is possible to connect various terminal devices
- Security, voice cryptography and hiding network topology
- Global roaming, availability from anywhere in the world
To date, the voice communication protocol has become the standard for the whole world.