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Concluded WG PSTN and Internet Internetworking (pint)

Note: The data for concluded WGs is occasionally incorrect.

WG Name PSTN and Internet Internetworking
Acronym pint
Area Transport Area (tsv)
State Concluded
Charter charter-ietf-pint-01 Approved
Document dependencies
Additional resources Pint Page
Personnel Chairs Igor Faynberg, Steven M. Bellovin
Mailing list Address
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Final 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.


Date Milestone Associated documents
Jun 2000 Determine if WG is to continue or conclude.

Done milestones

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