Synopsis:

       SMplaytone(vox_chan,toneid,duration_ms)

Arguments:

       vox_chan – The voice channel

       toneid        - One of the predefined toneIDs to play

       durations_ms – The duration of the tone in milliseconds

Description:    This function allows one of the Aculab  predefined simple output tones to be played on the given vox_chan.   (See Prosody document  for the list of predefine output tones)

Returns:  Returns 0 on success or negative error code