Originally created for circuit-switched telephony, the Signaling System No. 7 has faced a substantial shift with the arrival of LTE networks. Due to packet-switched architectures demand a new method to signaling, SIGTRAN, a family of specifications, was established to convey SS7 messages over IP

Historically, SS7 served as the core protocol for voice communication , reliably handling sessions across the public switched telephone network . As infrastructure progressed , SIGTRAN emerged to bridge this established SS7 domain with IP technologies, enabling data to move over improved data net