Definitions for "Signaling Gateway"
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.