SDL - Specification and Description Language

Specification and Description Language is an object-oriented, formal language defined by the ITU-T (International Telecommunications Union-Telecommunications Standardization Sector).The language is intended for the specification of complex, event driven, real time, and interactive applications involving many concurrent activities that communicate using discrete signals.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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