DPNSS - Digital Private Network Signalling System

An open standard signalling system developed by British Telecom in order that PABX (Private Automatic Branch Exchange) made by different manufacturers could be integrated. The standard came about as a requirement, when 2Mbps digital links first became available in the early 1980’s.


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

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