Session Initiation Protocol (SIP) Public Switched Telephone Network (PSTN) Call Flows

@article{Johnston2003SessionIP,
  title={Session Initiation Protocol (SIP) Public Switched Telephone Network (PSTN) Call Flows},
  author={Alan B. Johnston and Steve Donovan and Robert Sparks and Chris Cunningham and Kevin Summers},
  journal={RFC},
  year={2003},
  volume={3666},
  pages={1-118}
}
This document contains best current practice examples of Session Initiation Protocol (SIP) call flows showing interworking with the Public Switched Telephone Network (PSTN). Elements in these call flows include SIP User Agents, SIP Proxy Servers, and PSTN Gateways. Scenarios include SIP to PSTN, PSTN to SIP, and PSTN to PSTN via SIP. PSTN telephony protocols are illustrated using ISDN (Integrated Services Digital Network), ISUP (ISDN User Part), and FGB (Feature Group B) circuit associated… CONTINUE READING
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References

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Best Current Practice [Page 103] SIP PSTN Call Flows

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