SS7 Network Architecture

The SS7 network is used to switch information messages to set up, manage, and release telephone calls as well as to maintain the signaling network. SS7 network nodes are equipped with SS7 functionality and features to become SS7 signaling points or elements. SS7 is a common-channel signaling network, in that all signaling information is carried on a common signaling plane. The signaling planes and the voice circuit planes are logically separated.

SS7 networks consist of three signaling elements—Service Switching Point (SSP), Signal Transfer Point (STP), and Service Control Point (SCP)—and several link types, as illustrated in Figure 4-1. This section covers the signaling elements and signaling links in more detail.

Figure 4-1. SS7 Network Architecture

Figure 4-1. SS7 Network Architecture

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