![](/assets/images/picto-drapeau-france-3a76576a5d60a512053b4612ab58dae5.png)
2. Voice over IP and the move to NGNs
The advent of the Internet as a backbone network for transporting multimedia flows rendered the circuit-switching technology used in conventional telephony unsuitable. This led manufacturers to focus on recovering the "intelligence" of the telephone network (notably call processing functions and service platforms) and placing it on servers. The switching units (or switching matrices) of the old telephone switches were replaced by IP routers, in the case of all-IP communications, or by "transcoding" gateways, in the case of communications between the Internet and the PSTN. These transcoding gateways, which can be remotely controlled from a call server via a protocol such as MGCP or MEGACO/H.248, are one of the techniques known as NGN (Next Generation Networks). In these approaches, call control is placed at the level of functions called Media Gateway Controler (MGC). Transcoding functions...
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference
This article is included in
Networks and Telecommunications
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Voice over IP and the move to NGNs
Bibliography
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference