Call conversion method and call forward system based on SIP protocol

Abstract

The method is used for switching over the calls based on IP phone attendant console system and the core network controller. The IP phone attendant console comprises an attendant console server, an attendant console client side and a media server. The three above are connected via IP connection; the communication protocol uses SIP protocol; the core network controller is used to control the accessof all user ends and cooperates with the IP attendant console system to provide calling and switching functions, and is connected to the attendant console server via IP connection, and uses SIP protocol to exchange signaling with the attendant console server. Wherein, when the calling user makes call with the attendant console client side, the attendant console client side calls the called user; the attendant console server indicates the core network control to establish the call connection between the calling user and called user. The invention leads all switching services in PSTN network into the NGN network.

Description

technical field [0001] The present invention relates to a call transfer (Call Transfer) method and a call transfer system in the communication field, in particular to a call transfer method based on the SIP protocol (Session Initiation Protocol: Session Initiation Protocol) applicable to an IP console system and call forwarding systems. Background technique [0002] NGN (Next Generation Network) is an IP (Internet Protocol, Internet Protocol) packet network system based on a unified protocol. This service effectively reduces network investment and operation and maintenance costs, and is the main technology to promote future service integration. [0003] In the NGN environment, the attendant console has been widely used in large customers such as hotels, companies, and institutions, and has become an important source of business income for operators. [0004] As a call control signaling based on IP network, SIP protocol borrows ideas from other Internet standards and protoc...

AI Technical Summary

Problems solved by technology

However, the above-mentioned method for implementing call transfer in the softswitch network is implemented on the application server in conjunction with the softswitch controller, and cannot be realized through an independent set of IP console system. Moreover, this method is applied to the softswitch The ringing state transfer of the AG and IAD users under the exchange cannot be applied to the transfer of the IP console client, and it includes the transfer of the talking state and the ringing state

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