ABSTRACT: This release in the Notes on...series, Telcordia Notes on SS7 and CCS Network Evolution, discusses the ongoing evolution of the Signaling System 7 (SS7) protocol and wireline Common Channel Signaling (CCS) network architectures. This document provides high-level information on the currently deployed and evolving SS7 protocol and carrier CCS networks, recent developments, and future directions.

With Telcordia Notes on SS7 and CCS Network Evolution, you will learn about:

• The history of the SS7 protocol and CCS, the network architectures, and deployments
• The status of recent SS7 standards related to protocol and network capabilities, and activities related to deployments of such capabilities, with an emphasis on Local Exchange Carrier (LEC) CCS networks in North America
• Current industry directions for the ongoing evolution of SS7-based signaling and control as carrier networks begin to evolve beyond conventional circuit-switching and dedicated Time-Division Multiplexed (TDM) link and circuit facilities toward distributed Voice Over Packet (VoP) architectures based on Asynchronous Transfer Mode (ATM) and/or Internet Protocol (IP) data transport technologies.
• The interworking capabilities of the evolving SS7 protocols with the new IP-centric protocols, such as the Session Initiation Protocol (SIP).