Core Network

A core network, or network core, is the central part of a telecommunication network that provides various services to customers who are connected by the access network. One of the main functions is to route telephone calls across the PSTN.

Typically the term refers to the high capacity communication facilities that connect primary nodes. Core/backbone network provides paths for the exchange of information between different sub-networks. For enterprise private networks serving one organization, the term backbone is more used, while for service providers, the term core network is more used.

In the United States, local exchange core networks are linked by several competing interexchange networks; in the rest of the world, the core network has been extended to national boundaries.

Core/backbone network usually has a mesh topology that provides any-to-any connections among devices on the network. Many main service providers would have their own core/backbone networks, that are interconnected. Some large enterprises have their own core/backbone network, which are typically connected to the public networks.

The devices and facilities in the core / backbone networks are switches and routers. The trend is to push the intelligence and decision making into access and edge devices and keep the core devices dumb and fast. As a result, switches are more and more often used in the core/backbone network facilities. Technologies used in the core and backbone facilities are data link layer and network layer technologies such as SONET, DWDM, ATM, IP, etc. For enterprise backbone network, Gigabit Ethernet or 10 Gigabit Ethernet technologies are also often used.

Read more about Core NetworkPrimary Functions, Other Functions, Mobile

Other articles related to "network, core network, networks, core networks":

Bandwidth Cap - Standard Cap
... In many situations, each user of a network is expected to use high speed transmission for only a short time, for example to download a megabyte web page in less than a second ... is more relevant in cable internet where both the core network and the access network are shared, than in DSL where the core network is shared but the access network is not ... It is most relevant in wireless internet, particularly satellite internet, where both the core network and the access network are shared and total ...
GPRS Core Network - GPRS Tunnelling Protocol (GTP)
... GPRS Tunnelling Protocol is the defining IP-based protocol of the GPRS core network ... Primarily it is the protocol which allows end users of a GSM or WCDMA network to move from place to place while continuing to connect to the Internet as if from one ... Three forms of GTP are used by the GPRS core network ...
GPRS Tunnelling Protocol
... used to carry general packet radio service (GPRS) within GSM, UMTS and LTE networks ... GTP-C is used within the GPRS core network for signaling between gateway GPRS support nodes (GGSN) and serving GPRS support nodes (SGSN) ... GTP-U is used for carrying user data within the GPRS core network and between the radio access network and the core network ...
Core Network - Mobile
... There exist basically two core network types for mobile telephony The Mobile Application Part (MAP) used for GSM and UMTS The IS-41 core network used for D-AMPS (TDMA), cdmaOne and CDMA2000 ...
GEO-Mobile Radio Interface
... terrestrial digital cellular standards and supports access to GSM/UMTS core networks ... more or less corresponding to what plain old GSM Phase 2 is, and using exactly the same core network infrastructure ... Still connected to a 'Gb' style core network ...

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