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SS7 & Intelligent Network Fundamentals

SS7 is a critical component of modern telecommunications systems. SS7 is a communications protocol that provides signaling and control for various network services and capabilities. Being a layered protocol, SS7 provides various protocol levels for connection oriented and connectionless (database) signaling in fixed and mobile networks.

While the Internet, wireless data, and related technologies have captured the attention of millions, many forget or do not realize the importance of SS7.Every call in every Public Switched Telecommunications Network (PSTN) system is dependent on SS7. Likewise, every mobile phone user is dependent on SS7 to allow inter-network roaming. SS7 is also the “glue” that sticks together circuit switched (traditional) networks with packet-switched (IP based) networks.

The term “Intelligent Network” (IN) pertains to a framework for intelligence in support of Time Division Multiplex (TDM) circuit-switched networks. As opposed to IP-based networks, typified by intelligence at the edge and very flat, democratized communications, IN provides support for carrier-controlled networks with intelligence residing in centralized databases.

Duration: 1 – 2 days

Prerequisites: Understanding of basic telecommunications network functions and operation


At the conclusion of the workshop the student will be able to:

  • Understand principles of signaling in fixed and wireless networks
  • Understand the architecture, protocol and function of SS7
  • Understand the requirements for planning and engineering signaling networks
  • Identify the challenges of operating signaling networks
  • Understand principles of intelligent network function and operation in fixed and wireless networks
  • Identify the major intelligent network standards and their respective capabilities and functions
  • Understand the role and importance of SS7 in support of number portability
  • Review and evaluate various applications which rely on SS7 and/or intelligent network capabilities
  • Identify the future direction of signaling and intelligent networks

Course Outline:

  1. Course introduction
  2. Signaling
    • Trunk signaling
    • Database signaling
  3. Signaling in wireless networks
    • Call set-up
    • Roaming
    • Feature control
    • Applications signaling
  4. Details of SS7
    • Link types
      • A-links
      • B-links
      • C-links
      • D-links
      • E-links
      • F-links
    • SS7 protocol and function
      • MTP
      • ISUP
      • SCCP
      • TCAP
      • MAP
    • SS7 translations
      • Addressing
      • Routing
  1. SS7 network planning and engineering
    • Planning for availability and survivability
    • Traffic engineering principles
  2. SS7 operational issues
    • Signaling network management
    • Synchronization
    • Security
  3. Intelligent networks
    • What is network intelligence
    • Fixed networks
      • IN
      • AIN
      • INAP
    • Wireless networks
      • Proprietary solutions
        • Infrastructure provider proprietary
        • ISUP loop-back
      • Standards-based solutions
        • CAMEL
        • WIN
  1. Number portability
    • Geographic portability
    • Services portability
    • Local number portability
      • Fixed networks
      • Wireless networks
  1. Applications
    • Toll-free calling
    • Prepay wireless
    • SMS
      • Introduction
      • ANSI vs. GSM
      • Inter-carrier SMS
    • CNAP
    • Stand-alone HLR
    • Emergency and commercial location services
  2. Future of network intelligence
    • Advances in intelligent networks
      • Intelligent servers
      • Intelligence distributed in mobile devices
    • PSTN-to-IP convergence
      • SS7 in IP networks
      • Applications using IP as bearer


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