Principles of Operation for the TPC.INT Subdomain: General Principles and Policy
RFC 1530

Document Type RFC - Informational (October 1993; No errata)
Last updated 2013-03-02
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Network Working Group                                         C. Malamud
Request for Comments: 1530                 Internet Multicasting Service
Category: Informational                                          M. Rose
                                            Dover Beach Consulting, Inc.
                                                            October 1993

           Principles of Operation for the TPC.INT Subdomain:
                     General Principles and Policy

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard.  Distribution of this memo is
   unlimited.

Abstract

   This document defines the initial principles of operation for the
   tpc.int subdomain, a collection of service listings accessible over
   the Internet infrastructure through an administered namespace
   contained within the Domain Name System [1,2].

   This document is informational and applies only to those Internet
   sites that choose to register themselves within the tpc.int
   subdomain.  The tpc.int subdomain is organized as a cooperative of
   the sites that provide access within the context of the subdomain.
   Policy for the subdomain is set by a board responsible to the
   cooperative.

   The primary purpose of the tpc.int subdomain is to provide
   transparent mapping between general-purpose computers on the Internet
   and special-purpose devices directly connected to the telephone
   network.  Initially, a remote printing service is defined [3,4] which
   ties together G3-compatible facsimile devices on the telephone
   network with users of electronic mail in the Internet and associated
   message-handling domains connected to the Internet by application-
   layer gateways.

   It should be noted that remote printer gateways have long been
   technically feasible and have become an integral part of many
   individual networks.  The tpc.int subdomain integrates individual
   sites into a common namespace, transforming remote printing from a
   single-site, value-added service into an integral transparent service
   in the global Internet.

Malamud & Rose                                                  [Page 1]
RFC 1530             General Principles and Policy          October 1993

Overview of Services in the TPC.INT Subdomain

   The tpc.int subdomain is organized as a cooperative, an association
   organized for the purpose, without gain to itself, of rendering
   service as defined in this document and as further defined by the
   membership of the cooperative.  Members of the tpc.int subdomain
   cooperative are defined as those Internet sites who provide access to
   services as defined in this document and as periodically amended by
   the membership as represented by the Board of Arbitration and
   Conciliation for the tpc.int subdomain.

   The primary purpose of the tpc.int subdomain is to provide
   transparent mappings between users of general-purpose computers on
   the Internet and special-purpose devices directly connected to the
   telephone network.  This mapping extends the population reachable
   from the Internet by providing a communications path to devices not
   otherwise directly addressable.

   The initial remote printing facility is built on top of the
   electronic mail protocols of the Internet, including RFC 822 [5] and
   MIME [6].  Because the remote printing service uses the message-
   handling facilities of the Internet, this service is also available
   to message-handling domains that are connected to the Internet
   through application-layer gateways (e.g., X.400-compatible systems
   [7], UUCP-based message-handling environments [8], and commercial
   services such as AT&T Mail), MCI Mail), SprintMail), and CompuServe)
   [9]).

Operation of Name Service in the TPC.INT Subdomain

   Services in the Internet are identified with a service target name as
   listed in the Domain Name System (DNS).  These target names are
   looked up in the DNS and the appropriate resource records associated
   with the name are returned.  After the name lookup has been
   completed, the initiator exchanges a series of IP packets with an
   Internet site which provides access to a service accessible through
   the tpc.int subdomain.

   In the case of remote printing, the DNS MX resource record is used to
   register those Internet sites that provide access to the remote
   printing facility.  Specifically, an Internet site running a remote
   printer server registers itself in the DNS as being willing to
   provide access to some portion of the telephone system numbering plan
   as registered by one or more MX records within the tpc.int subdomain.

   For example, if the host hewes.radio.com is willing to provide remote
   printing to devices with telephone numbers beginning with the prefix
   +1-415-336, the host would be listed in the Domain Name System with

Malamud & Rose                                                  [Page 2]
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