RFC 3601 (rfc3601) - Page 1 of 10

Text String Notation for Dial Sequences and Global Switched Telephone Network (GSTN) / E

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Network Working Group                                       C. Allocchio
Request for Comments: 3601                                    GARR-Italy
Category: Standards Track                                 September 2003


              Text String Notation for Dial Sequences and
       Global Switched Telephone Network (GSTN) / E.164 Addresses

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2003).  All Rights Reserved.

Abstract

   This memo describes the full set of notations needed to represent a
   text string in a Dial Sequence.  A Dial Sequence is normally composed
   of Dual Tone Multi Frequency (DTMF) elements, plus separators and
   additional "actions" (such as "wait for dialtone", "pause for N
   secs", etc.) which could be needed to successfully establish the
   connection with the target service:  this includes the cases where
   subaddresses or DTMF menu navigation apply.

1.  Introduction

   Since the very first devices interacting with GSTN services appeared,
   a need for a unique text string representation of commonly called
   telephone numbers, and more generally DTMF sequences and actions, was
   foreseen.

   This memo describes the full text string representation method.  This
   specification was explicitly created to provide an easy, unique and
   complete reference which MUST be used by all other specifications
   needing a text string representation for a Dial Sequence.

   The specification was collected directly from Dial Sequence
   definitions which are already described in existing Standard Track
   specifications (such as [6] [7] [8] [9]), and is fully synchronized
   with them.  Full compatibility is thus assured, and as a consequence,
   this specification results in a compendium of existing definitions.




Allocchio                   Standards Track
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