|WikiProject Telecommunications||(Rated Start-class)|
The discussion on "gatekeeper" is poorly written. The H.323 Gatekeeper should be the main reference there.
- Yeah, "gatekeeper" typically refers to the H.323 gatekeeper, and is different from the MGC as mentioned here.
I suggest a redirection from the term All-IP, which appears often in several pages, to this one. Anyone can do it? 22-Feb-07
The complete picture of NGN
Which next 5-10 years?
The articles talks about application of the NGN in next 5-10 years (first paragraph), it should be specified along with a reference time, because the article started in May 2005, and today in 2009, four years are already over if that reference point is meant. -Hemant wikikosh (talk) 07:06, 20 October 2009 (UTC)
The content of this article is rather obsolete and needs a complete rewrite. It doesn't specify when this was factual, but it reads like it reflects the state of perhaps 10 years ago. No NGN today talks about implementing things like H.323. It states that NGNs will be packet-switched, which is rather inaccurate, in fact the most recent and prominent NGNs implement circuit-switching specifically to guarantee high availability and bandwidth, see dynamic circuit network and Internet2. Kbrose (talk) 14:19, 27 October 2009 (UTC)
NEXT GENERATION NETWORKS
In recent years, the telecom network has been developing rapidly, and the integrated communication ability has been enhanced greatly. However, the network faces more and more pressure from the gradual integration of telephone network, computer network and cable television network. Because the network load is increasing and service demands become diversified, the carriers have to provide more new services to attract users, which are hardly provided by the PSTN (Public Switched Telephone Network) or PLMN (Public Land Mobile Network). Meanwhile, the rapid-developing data networks are taking over some services from the PSTN and PLMN and play an important role in bearing voice service. Whereas, the Voice over IP (VoIP) based on the H.323 protocol can only meet the basic requirement for packet voice service, and cannot provide abundant service functions. PSTN was designed for Plain Old Telephone Service (POTS). This is the basic copper wire line service that allows point-to-point communications between telephones or low-speed modems. Switching in this system accommodates temporary communications such as phone calls. The calls are established through the switches and the whole circuit is reserved till the duration of the call. PSTN was designed for the provision of real time voice services as it provides a dedicated and uninterrupted communication channel. However, it is not suitable for the provision of data which is bursty in nature. Since the network provides a dedicated channel, the bandwidth is wasted for the duration of time in which the user is not sending any data. In such conditions, the Next Generation Network (NGN), which is based on the soft switch technology, comes into being. NGN is a milestone in the telecom field. It indicates the arrival of the new generation telecom network. In terms of the development, NGN is a step from the traditional circuit switched PSTN to the packet-based IP network. NGN bears all the services of the PSTN, offloads large amount of data transmission to the IP network to reduce the load over PSTN, and supports new services and enhances traditional services by taking full advantage of IP technology. In this meaning, NGN is the integration of TDM (Time Division Multiplex)-based voice network and IP/ATM (Asynchronous Transfer Mode)-based packet network. It enables the bearing of voice, video, data, etc. services over the new generation network. What is NGN? NGN is an integrated and open network. It integrates all the existing network environments, ambient access devices and terminal products. NGN is a service driven network. By separating service from call control, and call control from bearer, it can realize a relatively independent service system and thus enables service independent from network. Such open service architecture can satisfy the users’ demands for services, strengthen the comprehensive competition ability of the network and realize the sustainable development.
The next-generation network seamlessly blends the public switched telephone network (PSTN) and the public switched data network (PSDN), creating a single multiservice network. Rather than large, centralized, proprietary switch infrastructures, this next-generation architecture pushes central-office (CO) functionality to the edge of the network. The result is a distributed network infrastructure that leverages new, open technologies to reduce the cost of market entry dramatically, increase flexibility, and accommodate both circuit-switched voice and packet-switched data.
Features Of NGN: NGN has the following features:
Openness: NGN can be divided into several functional modules according to different networks interworked and different functions provided. These modules can not only be developed independently, but also act as a whole. Meanwhile, such openness also enables the carriers to choose the best products in the market as per their own requirements, without worrying about the interworking among different devices.
High efficiency: Since NGN can separate service from call control, it provides good conditions for the real independence of service from the network and effective minimization of the development period for a new service. Accompanying with the interworking of multiple networks, many new services are emerging. Diversified access: NGN integrates the advantages of PSTN, PLMN and IP network, which enables the communication among analog user, digital user, mobile user, ADSL (Asymmetric Digital Subscriber Line) user, ISDN (Integrated Services Digital Network) user, IP narrowband network user, IP broadband network user and even the user accessing via satellite. Multimedia: Real-time transmission of voice, video and other multimedia streams is another outstanding advantage of NGN.
Low cost: Compared with current PSTN, the adoption of relative cheaper networks such as IP network as the transmission bearer in NGN greatly reduces the communication cost. This advantage is more obvious in toll calls and international calls. Why NGN?
1. Today’s Circuit switched Network do not support a variety of sophisticated services and applications, like multimedia. 2. Today’s Circuit switched Network is engineered to handle voice traffic with short holding times. One can imagine the impact of the increase in dial-up Internet traffic with its much longer holding times causing bottle-necks in Circuit-switched Networks. 3. Circuit switches are highly reliable elements within the PSTN infrastructure. However, they were never optimized for data. 4. Packet-based transport allows flexible bandwidth dimensioning, eliminating the need for fixed size trunk groups for voice, thus making it easier to manage network structures. 5. NGN will be service-driven, providing all means needed to offer new services and customize existing ones in order to generate future revenue. —Preceding unsigned comment added by Hamid lal (talk • contribs) 18:04, 11 November 2009 (UTC)
In other words
In other words, in a simple and single word: IPv6.
IPv6 started in 1998. I started using it in 2001. Computing technologies usually spread in 6 months and have 2y life time. IPv6 should have spread by 1999, and be outdated before 2002. We are now in 2013, and nobody using it yet.
The most amasing thing is that this article describes, and tells all advantages of IPv6 without even mentioning it !!!