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SS7 mediation for data network call setup and services interworking

  • US 6,084,956 A
  • Filed: 09/19/1997
  • Issued: 07/04/2000
  • Est. Priority Date: 09/19/1997
  • Status: Expired due to Term
First Claim
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1. A method of interworking Common Channel Signalling System Number 7 (CCS7) call control messages in a virtual CCS7 data node and setting up appropriate resources to initiate incoming calls into a data network, comprising the steps of:

  • predefining a subset of CCS7 Integrated Services Digital Network (ISDN) User Part (ISUP) messages required for controlling setup of a data network call;

    translating CCS7 call control messages into a set of primitives used by a network access server (NAS) and checking said set of primitives to authorize call origination;

    predefining a set of primitives to exchange with the NAS;

    exchanging primitives with the NAS for controlling setup of data network side transport resources; and

    establishing NAS control of transport links between a public switched telephone network (PSTN) and said data network.

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