sigtran

technology. International organizations engaged in softswitch standards are mainly IETF and ITU-T. starting from the standpoint of the computer and telecom respectively, it has contributed to the softswitch protocol ｡ Protocols between media gateways and vswitches The protocols between media gateways and vswitches except SG are MGCP and MEGACO/H.248. MGCP is a version earlier than MEGACO/H.248, its flexibility and scalability are not comparable to MEGACO/H.248, and its support for multiple carr

, routing, authentication, billing, and other functions. It also provides users with all the services available to existing circuit switches, it also provides third-party programmable capabilities." As the core of NGN, Softswitch is the coordination center between the Circuit Switching Network and the IP network. It controls various media gateways to achieve service layer fusion between different networks. In the communication system, the control is solved through negotiation, and a protocol is

between SCN and IP addresses. Signaling Gateway SG is responsible for signaling conversion, only the underlying conversion of SCN signaling is performed, that is, the TDM circuit is switched to the IP network transmission mode without changing the application layer message. The Softswitch is responsible for controlling the establishment and release of the Media Gateway connection based on the received signaling. Softswitch is used to analyze and process signaling messages and implement intercom

controls and manages the bearer control resources of media gateway, including MGCP and H.248/MEGACO. 2) interface protocol between MGC and the signaling gateway (SG): used to transmit the signaling information between MGC and the signaling gateway. This interface protocol can use the SIGTRAN protocol. The lower layer of SIGTRAN uses the SCTP protocol to provide reliable connections for TCP/IP network trans

protocol RSTP. The IETF signaling transmission Working Group (sigtran) is defining and improving another mechanism for transmitting signaling messages, which is just becoming the ietfrfc stream control transmission protocol (sctp ). This Protocol enables the exchange of signaling messages on an IP-based public group switching network. Traffic Control and error control are implemented end-to-end, to improve the effectiveness, you can use a cluster of

, and so on. 1. Integrated business Control Point (ISCP) The integrated service Control point has the function of business controlling (SCF), as the core equipment of the integrated intelligent network, it can connect to ISSP directly or through signaling network and Sigtran, and control ISSP for call continuation. 2. Integrated Business Exchange Point (ISSP) The integrated service Exchange point is the connection point between the existing commun

handling and interconnection protocols, such as MGCP, H.323, and SIP. In the future, communication protocols such as H.248 and SIGTRAN will also be supported. The WCS can also be combined with a variety of VoIP user equipment, whether it is USB Phone, IP Phone, Gateway, IP-PBX, etc., can be perfectly combined with the WCS. In addition, the WCS provides various solutions for VoIP NAT. In most IP network environments, user devices can use the VoIP func

functions Softswitch is an open, multi-protocol entity. Therefore, various standard protocols must be used to communicate with various media gateways, application servers, terminals, and networks, protects user investment to the maximum extent and gives full play to the role of existing communication networks. These protocols include H.323, SIP, H.248, MGCP, SIGTRAN, RTP, and INAP. Vi. resource management functions Softswitch should provide resource

software is to use H.323 for communication, has easy to manage the network architecture and high value; MGCP (Media Gateway Control Protocol) is developed by IETF (Internet Engineering Task Force), which is easier than H.323 in software and communication Protocol design. In addition, the next-generation network telephone communication protocols and architectures include MEGACO, SIP, and SIGTRAN. The traditional Telephone Network (PSTN-Public Switch T

integration of the business, any user can be anywhere, using any access means, any time to obtain the basic same business, "a bit to provide, full network sharing" to support the third party business, support user business customization, business personalization. (Computer science) Because the 3G test network is required by the R99 format, therefore softswitch in this 3G test network does not have a significant application, the external interface of each manufacturer's equipment is the standar

entity. Therefore, various standard protocols must be used to communicate with various media gateways, application servers, terminals, and networks, protects user investment to the maximum extent and gives full play to the role of existing communication networks. These protocols include H.323, SIP, H.248, MGCP, SIGTRAN, RTP, and INAP. Vi. resource management functions Softswitch should provide resource management functions to centrally manage various

relay gateway and the signaling gateway are the devices for intercommunication between NGN and PSTN. The so-called relay gateway is to complete the conversion of the 64 K link of the circuit relay based on PCM code) and the media stream on the group network. The so-called signaling gateway, it is to complete the conversion of the SIGTRAN Signaling System Based on circuit relay's no. 7 signaling system and based on the packet network IP bearer.Media R

protocols must be used to communicate with various media gateways, application servers, terminals, and networks, protects user investment to the maximum extent and gives full play to the role of existing communication networks. These protocols include H.323, SIP, H.248, MGCP, SIGTRAN, RTP, and INAP. Resource management Softswitch should provide resource management functions to centrally manage various resources in the system, such as resource allocat

functions.2) Service Platform (business Platform) is used to generate and provide new services, including SCP and application servers.(3) Signaling Gateway) currently, it mainly refers to the No. 7 Signaling Gateway device. The traditional No. 7 signaling system is based on circuit switching. All applications are carried by MTP, and IP addresses are required for the softswitch system.(4) Media Gateway) converts a Media stream. According to their location and the different processing media strea

From: http://wiki.dzsc.com/info/4248.html Sctp is regarded as a Transport Layer Protocol. Its upper layer is sctp user applications, and the lower layer is used as a group network. In the application of the sigtran protocol, the upper-layer sctp user is the adaptation module of SCN signaling (such as m2ua and m3ua), and the lower layer is the IP network.Directory Sctp terminology Sctp Functions Sctp basic signaling process 添加新目录>>--> Sctp term