In this article we will discuss SS7, will make brief discussion on SS7, last article we discuss about LLDP.

Signaling System No.7 (SS7) is a telecommunications signaling architecture traditionally used for the set up and tear down of telephone calls. It has a robust protocol stack that uses out-of-band signaling to communicate between elements of the public switched telephone network (PSTN).

They generally originate, terminate, or switch calls. signal transfer points (STPs)—STPs are the packet switches of the SS7 network. They receive and route incoming signaling messages towards the proper destination. They also perform specialized routing functions.

STP – is a network packet switches SS7. Their task is to receive and distribution of signaling messages that arrive at the appointed place. They receive and distribute. incoming signaling messages to the destination.

Although the need for SS7 STPs (SS7 Signaling Transfer Point) to support 2G/3G networks will continue for decades, advanced DSCs provide the essential functions of centralized core and edge routing for the Diameter and SS7 protocol elements that are widely used in 2G/3G networks including all-IP.

SS7 or C7 signalling is the core signalling/control protocol used within fixed and mobile networks. The SS7 network is both a high speed and high availability network providing the backbone of all telephony networks worldwide.


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