Intelligent network

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The intelligent network (IN) is not a separate physical network, but a service-oriented central system that is based on an existing telephone network (e.g. ISDN ). An IN extends a telephone network with intelligent network components and additional performance features. The focus is on value-added services for landline telephony , mobile communications and fax . It is not necessary for IN operators to be network operators at the same time; they can implement their offer via existing networks.

Classic IN technology

Numbers that lead to an IN service are entered in special switching centers that are equipped with a function called a service switching point . If such a number is called, the exchange addresses the service control point of an IN system via the INAP protocol (a protocol from the Signaling System 7 family ) . In this, the data of the call can then be linked with various parameters (such as origin of the call, time, day of the week) and services that can be flexibly designed and influenced can be offered.

The classic architecture of the IN networks is in the ITU -T Q.1200ff standards. Are defined. Variants for mobile communications can be found in the specifications of the 3rd Generation Partnership Project .

Examples

Well-known value-added services of the IN are

  • the MABEZ Service 0137 ( Ma ssenverkehr to be voted Z hank, better known as televoting from radio and TV programs),
  • the service and special numbers ( 0180 , 0700 , 0800 , 0900 ),
  • VPN (Virtual Private Network) services for closed user groups.

In addition, a large part of the prepaid services in mobile communications is implemented as an IN service.

Recent developments

With the introduction of IP-based voice services and signaling protocols, IN services are increasingly being used in the IP network, i. H. realized without connection to the Signaling System 7 (see also SIGTRAN ).

See also