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PSTN and Internet Internetworking (pint)
(concluded WG)

Note: The data for concluded WGs is occasionally incorrect.
Name: PSTN and Internet Internetworking
Area:Transport Area (tsv)
State: Concluded
Charter: charter-ietf-pint-01 (Approved)
More info: Pint Page
Chairs: Igor Faynberg <>
Steven Bellovin <>
Mailing List

Charter for Working Group

The PSTN/Internet Interfaces (PINT) WG addresses connection
arrangements through which Internet applications can request and enrich
PSTN (Public Switched Telephone Network) telephony services. An
example of such services is a Web-based Yellow Pages service with the
ability to initiate PSTN calls between customers and suppliers.

This working group has six main objectives:

* Study architecture and protocols needed to support services in which a
user of the Internet requests initiation of a telephone (i.e., PSTN-
carried) call to a PSTN terminal (i.e., telephone, FAX machine).
The protocols are not to support any form of third-party call control
for that matter, any type of call control; their role is rather to
securely carry call requests to the PSTN. Specific services to be
considered initially are Click-to-Dial, Click-to-Fax,
and Web access to voice content delivered over the PSTN.

* Produce an informational RFC that describes current practices for
supporting the services in question.

* Based on the existing practice and agreed on improvements, develop a
standards track RFC that specifies a Service Support Transfer Protocol
(SSTP) between Internet applications or servers and PSTN Intelligent
Network Service Nodes (or any other node that implement the Service
Control Function). SSTP is an application-specific transport protocol
operating over TCP.

* Consider security issues relating to prividing functions of this
type. In particular understand any threats posed by this technology
and resolve them, and any other security issues in the proposed

* Based on the existing practice and agreed on improvements, develop a
standards track RFC for a relevant MIB (SSTP MIB) to support the
management protocol between Internet applications and the PSTN Service
Management System. The SSTP MIB is to conform to SNMP standards.

* Consider extensions of the above architecture and protocols to support
wider range of PSTN Intelligent Network (IN) based services.


First WG meeting at Munich to discuss 2 submitted drafts and begin work on the informational rfc and on SSTP
Issue first draft of Internet-Draft intended for Informational.
Issue first draft of SSTP Internet-Draft
Meet at Washington IETF to gain WG consensus on informational draft
Submit Toward the PSTN/Internet Inter-Networking--Pre-PINT Implementations to IESG for publication as an Informational RFC.
Submit PINT Protocol Internet-Draft
Gain WG consensus on PINT Protocol draft
Submit PINT Protocol Draft to IESG to be considered as proposed standard
Produce first draft of PINT MIB Internet-Draft
Reach consensus on PINT MIB i-d
Submit PINT MIB ID to IESG for considratgion as a Proposed Standard.
Submit any proposals for future work, to be done by a new WG if
Jun 2000
Determine if WG is to continue or conclude.