A signaling agent that receives/sends switched circuit network (SCN) native signaling at the edge of the Internet protocol (IP) network. In particular the signaling system number 7 (SS7) SG function translates variants ISUP and TCAP in an SS7-Internet Gateway to a common version of ISUP and TCAP.
a device that enables connectivity between different networks by resolving signaling differences present in legacy switches and new network equipment (such as VoIP Gateways
A signaling gateway (SG) is an IETF and ISC concept. It is a device or computer that interfaces a softswitch with a signaling system such as SS7.
Gateway that supports only signaling traffic (no bearer traffic.) For example, a gateway that terminates SS7 A-links is a signaling gateway.
A telephone company switch transmits SS7 signals to a signaling gateway. The gateway, in turn, converts the signals into SIGTRAN packets for transmission over IP to either the next signaling gateway or, if the packet destination is not another PSTN, to a softswitch.
A Signaling Gateway is a network component solely responsible for translating signaling messages (i. e. information about call establishment and teardown) between one medium (usually IP) and another (PSTN). For example, a signaling gateway might translate between ISUP and SIP. A signaling gateway is often part of a softswitch in modern Vo IP deployments.