Intelligent Network Application Part

What Does Intelligent Network Application Part Mean?

An intelligent network application part or protocol (INAP), part of Signaling System 7 (SS7) protocol suite, is the signaling protocol used in intelligent networking. SS7 is typically on a layer right on top of the Transaction Capabilities Application Part (TCAP).


INAP can be considered as the logic which controls telecommunication services which have been migrated from traditional service switching points (SSP) toward newer computer-based service platforms.

Techopedia Explains Intelligent Network Application Part

The intelligent network application part serves as the signaling protocol between service switching points, service control point (SCP) and intelligent peripherals or network media resources.

The service control unit consists of logic programs and data from third-party derived services or operators.

INAP is the protocol in use for intelligent network communication in most places outside of North America. It is based on published International Telecommunications Union capability sets (CS).

Applications use INAP protocol in order to perform remote operations between network nodes, for example between SSP and SCP.

INAP then deliver these remote operations encapsulated within the TCAP component sublayer towards peer application processes in a remote node.

Services defined by INAP:

  • VPN short digit extension dialing service

  • Single number service

  • Do not disturb service (call forward)

  • Personal access service (user management of calls)

  • Disaster recovery service (backup call destinations)


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Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…