The IESG has approved the Internet-Draft 'Text string notation for Dial Sequences and GSTN / E.164 addresses' <draft-allocchio-gstn-05.txt> as a Proposed Standard. This document has been reviewed in the IETF but is not the product of an IETF Working Group. The IESG contact persons are Ned Freed and Ted Hardie. Technical Summary The document describes the full set of notations needed to represent in a text string a Dial Sequence. A Dial Sequence is normally composed by Dual Tone Multi Frequency (DTMF) elements plus separators and the 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. Global Switched Telephone Numbers (GSTN) / E.164 addresses (commonly called "telephone numbers") are a subset of a Dial Sequence, and thus use the same set of notations. Working Group Summary This is not the product of any working group in the IETF, but it has been reviewed in the working groups which deal with E.164 numbers of any kind. In version 03 (which was last called), there were some misunderstandings what this document specified, and this is cleared up in version 04. This document is a compilation of syntaxes used in email, fax and URL definitions, and is not supposed to replace any of those specifications, but instead be a clear definition using ABNF on the syntax used. Protocol Quality The spec was reviewed for the IESG by Patrik Faltstrom.
