Servers in the PSTN Initiating Requests to Internet Servers (SPIRITS)

SPIRITS protocol [RFC 3910 ] - implementing a family of IN services via internet server (rather than in the PSTN)

For example, internet call waiting (ICW) - calling a busy phone in the PSTN network could pop up a call waiting panel on the client that is using this telephone line, this replaces earlier solutions such as:

for example, Ericsson’s PhoneDoubler, Ericsson Review, No. 04, 1997 http://www.ericsson.com/about/publications/review/1997_04/article55.shtm
PDF of the entire article: http://www.ericsson.com/about/publications/review/1997_04/files/1997041.pdf Links to an external site.

SPIRITS unlike PINT allows two way interaction between Internet and PSTN.

Slide Notes

V. Gurbani (Editor), A. Brusilovsky, I. Faynberg, J. Gato, H. Lu, and Unmehopa, “The SPIRITS (Services in PSTN requesting Internet Services) Protocol”, IETF RFC 3910 , October 2004 http://www.ietf.org/rfc/rfc3910.txt Links to an external site.

G. Camarillo, A. B. Roach, J. Peterson, and L. Ong, “Integrated Services Digital Network (ISDN) User Part (ISUP) to Session Initiation Protocol (SIP) Mapping”, IETF RFC 3398, December 2002 ftp://ftp.rfc-editor.org/in-notes/rfc3398.txt Links to an external site.

Transcript

[slide456] SPIRITS. I mentioned yesterday the idea of phone doubler, that we could essentially do internet call waiting, delivering the call simultaneously as you were using the telephone line for your data communications. And it could allow two-way interaction between the internet and the PSTN.