"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."