Da Voismart Knowledge Base.
Waits for an extension to be entered

  WaitExten([seconds][|options]): This application waits for the user to enter
a new extension for a specified number of seconds.
  Note that the seconds can be passed with fractions of a second. For example,
'1.5' will ask the application to wait for 1.5 seconds.
    m[(x)] - Provide music on hold to the caller while waiting for an extension.
               Optionally, specify the class for music on hold within parenthesis.