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SPIRITS (Service in the PSTN/IN Requesting InTernet Service)
Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.
The IETF called "Working Group" Service in the PSTN/IN Requesting InTernet Service (spirits) Working Group is addressing how services supported by IP network entities can be started from IN (Intelligent Network) requests, as well as the protocol arrangements through which PSTN (Public-Switched Telephone Network) can request actions to be carried out in the IP network-in other words, how PSTN can execute telephony services on IP networks.
Some examples covered by SPIRITS include Internet call waiting, Internet caller-ID delivery, and Internet call forwarding. RFC 2995 (Pre-SPIRITS Implementations of PSTN-Initiated Services, November 2000) describes an Internet call-waiting service that allows subscribers to use their telephone lines for Internet access and also be notified of incoming voice calls.
Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.