Another name for multiservice communication networks is NGN, which, in English, sounds like New Generation Networks or Next GenerationNetwork. Multiservice communication networks are networks of the newest generation. The core is IP networks that support a partial or complete list of much needed voice, multimedia and data services. Multiservice communication networks operate on the principle of convergence of telecommunication services.
What were the prerequisites for the emergence of NGN?
Previously, various information was transmitted whenthe help of departmental communication networks, such as data transmission network, telegraph, telephone and so on. Soon there was an idea to unite all departmental communications in one, named as follows: ISDN. However, she soon failed. And there were quite a few reasons for that: the high cost of ISDN equipment, the emergence of new demanded services, the development of IP networks. Therefore, there was a new network - NGN, which was built on the basis of the IP protocol.
What are the principles of multiservice communication networks?
Information transmitted through the network of a newgeneration, is divided by its type into signal and user. The first provides certain services and ensures uninterrupted subscriber switching. The user also contains useful information for the subscriber (video, voice, data, and so on).
NGN is based on MPLS technology, as well as the Internet. Today, the following approaches to NGN construction are distinguished:
1. H.323 is the first of the currently available types. It is presented as data overlays through ISDN networks.
2. SIP is independent of transport technologies. H.323 replaced H.323 when a number of problems were identified. SIP provides VoIP services.
3.MGCP performs decomposition of gateways, breaking them into three blocks. This Signaling Gateway - transmits signaling information, Media Gateway - transmits user data, Call Agent - contains the intelligence of the gateway.
These approaches can be used both jointly and separately.
The Softswitch device manages VoIP sessions,provides communication of existing networks with modern PSTN. The Gatekeeper function performed by the H323-based Softswitch and the Call Agent function make the device more modern.
The MGCF softswitch performs the function of channel and packet switching.
What is NGN at the moment?
Increasingly, communication operators switch to switchingpackages. New technologies allow seamless transition from networks of the early generation to modern ones, ensuring continuous operation in any telephone network. Thus, in order to not fundamentally change the whole structure of the network, we need to use this principle of point transition. Requirements for transfers to NGN:
Who is the manufacturer of the equipment?
NGN manufacturers are the following companies: Cisco Systems, Siemens, Alcatel-Lucent, Huawei, Avaya, etc. In Russia - MFI Soft.
There are also multiservice cable networks.
Multiservice network gives an opportunitymultichannel cable television, video surveillance channels, high-speed Internet, data transmission Ethernet, data collection and management of metering devices for utilities.
Multiservice cable networks allow broadcasting channels in any part of the country, district or city. Therefore, it is used by many cable operators.
New transitions from old technologies to modern onesprovide an opportunity to create something more perfect, innovative without losing existing services and equipment. At the same time, old functions are retained, which is important for communication operators.
Multiservice communication networks more than once uswill please with something new, because they have much to develop. Well, to date, NGN provides all the services that the most advanced telephone or cable network can provide.