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Telephony Signaling & Service Control

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Abstractions about switched transport, call control, private-network signaling, charging policy, telephone extensions, service interfaces, and telecommunications protocols.

9 abstractions in this family — domain-specific abstractions that sit near one another in structural-signature space (k-means over structural-signature embeddings). Each is shown with its short description.

  • Automatic switched-transport network — A transport-network control-plane architecture that automatically discovers resources and establishes, modifies and releases end-to-end connections on request.
  • Bearer-Independent Call Control — A telecommunications signaling protocol that separates narrowband call-service control from the technology used to establish the bearer path across a broadband core.
  • Digital Private Network Signalling System — A channel-associated signaling protocol for interconnecting private branch exchanges over digital leased trunks and exposing networked telephony features.
  • Extension (telephone) — A terminal or internal address sharing or branching from a primary telephone service within a residence or private exchange.
  • Policy and charging rules function — A mobile-network core control function that makes real-time policy, service-data-flow and charging decisions from subscriber, service and network context.
  • Stimulus protocol — A centralized-control protocol that carries low-level endpoint events and presentation commands without embedding the application’s call state in the peripheral.
  • Telephony Server Application Programming Interface — A historical Novell–AT&T server-centered computer-telephony interface exposing call control, switching, messaging and logging services to network clients.
  • VT1.5 — A SONET virtual tributary format that allocates a sub-STS-1 payload channel sized to transport a DS1 signal through synchronous multiplexing.
  • X.75 — An ITU-T protocol standard for interconnecting packet-switched X.25 networks across a network-to-network signaling interface.