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The SI3000 Signaling and Media Gateway (SMG) is an excellent platform for building telecommunications and data networks, it brings highly scalable and flexible PSTN-to-IP transport and signaling functionality to a VoIP network.
Using Iskratel’s SI3000 SMG, service providers can upgrade their infrastructure to a next-generation IP network, while still keeping their existing equipment in place, to offer voice services with an optimal user experience. The signaling and media gateway incorporates a media server that supports a variety of media processing functions, including announcement generation, DTMF detection and generation, message playing and recording, conferences, and other advanced capabilities.
The SI3000 SMG network elements are centrally supervised and managed.
The SI3000 SMG includes three main voice functionalities: the media gateway, the signaling gateway and the media server.
The Media Gateway functionality ensures that the PSTN channel content is converted into a stream of data packets by using various VoIP codecs (G.711, G.722, G.722.1, iLBC, G723.1, G.726, G729, AMR-WB, AMR-NB, GSM-EFR and Clear Channel) and vice versa. Additional roles in the network:
The Signaling Gateway provides the transformation of legacy TDM signaling (SSN7, DSS1 and V5.2) into IP-based session-control protocols (M2UA, M3UA, M2PA, IUA and V5UA) for communication with the call server. In particular, the CAS (1VSK, 2VSK, E&M and R2) signaling conversion to the IP network brings the carrier all the existing, well-known capabilities.
The Media Server bundles the offer for the carrier with the following services:
The MGCP and H.248 protocols are used for control protocol between a media server and a call server. The media server performs the indicated functionalities independently of the mode of coding for the voice signal in a call.