Interaction of communication networks by protocols of signal networks ACS №7

The concept of NGN implies convergence of IP-telephony networks with PSTN, digital network with integration of services (ISDN), intelligent networks (IN), mobile networks and the Internet. The basic types of signaling include signaling for connection management (protocols -SIP, SIP-T, ACS number 7, H.323), signaling for interaction between different software switches (protocols -SIP, SIP-T) and signaling for gateway management (SG - signaling gateway, MG - media gateway, AG - access gateway, protocols -Sigtran, MGCP, Megaco / H.248). The modified SIP-T protocol (SIP for Telephony) allows the integration of the SS7 protocol with the SIP protocol. The SIP network interaction node with the SS7 signaling network encapsulates ISUP messages into SIP messages and translates a portion of the information from the ISUP messages into the SIP message headers to ensure their transport in the packet IP network.