Services in PSTN/IN Requesting Internet Service Protocol (SPIRITS PROTOCOL)

Services in PSTN/IN Requesting Internet Service Protocol (SPIRITS PROTOCOL)

ABSTRACT:

SPIRITS stands for Services in PSTN/IN Requesting InTernet Service. SPIRITS services are those originating in the PSTN (Public Switched Telephone Network) and necessitating the interactions between the PSTN and the Internet. Examples of SPIRIT services are Internet Call Waiting, Internet Caller-ID Delivery, and Internet Call Forwarding.

SPIRITS is concerned with how services supported by IP network entities can be started from IN (Intelligent Network) requests, as well as the protocol arrangements through which PSTN can request actions to be carried out in the IP network in response to events (IN Triggers) occurring within the PSTN/IN. SPIRITS concerns architecture and protocols for secure transport of IN trigger information (requests for actions, as well as plain event notifications, including parameters) from PSTN/IN to the IP network, and optional responses from the IP network back to the PSTN/IN.

The SPIRITS events package, named "spirits," has two sub-packages- INDPs,"for
the events that correspond to IN Detection points and "user-prof", for the events related to the user profile information.

SIP has been chosen as the signaling base protocol. Minimum support for SPIRITS requires a basic notification mechanism. Also operability with PINT(the protocol that does the reverse of SPIRITS)is necessary.


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