Text String Notation for Dial Sequences and Global Switched Telephone Network (GSTN) / E.164 Addresses
Claudio Allocchio · 2003
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.