PSTN and Internet Internetworking (pint) 




Charter



Status: Concluded February, 2001 







Chair(s):







 Steve Bellovin 



 Igor Faynberg 







Description of 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 



or,



  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, 



Click-to-Fax-Back,



  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 



standard.







* Based on the existing practice and agreed on improvements, develop a



  standards track RFC for a relevant MIB (SSTP MIB) to support the 



service



  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 



a



  wider range of PSTN Intelligent Network (IN) based services.

Request for Comments:

  • RFC2458 Toward the PSTN/Internet Inter-Networking --Pre-PINT Implementations (Informational)
  • RFC2848 The PINT Service Protocol:Extensions to SIP and SDP for IP Access to Telephone Call Services (Proposed Standard)
  • RFC3055 Management Information Base for the PINT Services Architecture (Proposed Standard)