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Consists of a group of extensions to SIP that allow events on the Internet to initiate events on the PSTN. The most famous application this supports is called “click-to-call”. Here is an example of how it might work:
Let’s say Lina is browsing a web page about vacuum cleaners. The web page doesn’t say whether the vacuum cleaners have attachments that are interchangeable with the one she already owns. It does have a button that says, “Click here if you want to talk to a customer representative.” When she clicks the button, a message comes up that says that if she has a modem and only one phone line in the house that she should log off on her modem in three minutes so that a customer representative can call her. When the call comes in, the call center knows what the call is going to be about, has a copy of the web page she was looking at, and even has her account information (if she has stored it into cookies on her computer) so that she can order right away if she decides to. PINT defines the process for the exchange between the web and the phone system.
The PINT server acts as a proxy server. It requests one session from the Call Center to the PINT Server. It uses Subscribe so that the MGC can send a Notify when the Call Center is ready. Once the call center is ready, it does the same thing for a session to Lina’s phone. When both have sent their Notify messages, the Pint Server completes the connection.
References:
IETF.org, RFC 2848
Posted by yogendra
The study of IN/Internet interworking occurred initially in the PSTN/Internet interworking (PINT) working group of the IETF.
The relationship between PSTN and Internet Interworking basically provides PSTN services which will be accessible from the Internet via the PINT protocols. It defines these services in
terms of a simple set of architectural elements and atomic services. It gives some concrete examples of these services, and indicates how to build the examples out of the presented atomic services.
We use the term "PSTN/Internet Interworking (PINT) Service" to denote such a complete transaction, starting with the sending of a request from an IP client and including the telephone call itself. PINT services are distinguished by the fact that they always involve two separate networks.
Posted by sagitraz
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