pages did not scroll, but could effectively be extended by the use of frames, which required alphanumeric suffixes to be appended to the numeric page numbers. thus keying page *7471# actually resulted in the display of frame 7471a which could be extended by use of follow-on frames 7471b, 7471c etc. each of which was accessed by repeated use of the "#" key. because the prestel system was originally designed to be operated solely by means of a simple numeric keypad it was not possible to access frames other than the top level frame directly (i.e., in this case pages other than "7471a").