The ornamental design for a telephone, substantially as shown and described.
FIG. 1 is a top plan view of a telephone showing my new design;
FIG. 2 is a side view of my new design;
FIG. 3 is an end view of my new design; and
FIG. 4 is a perspective view of my new design showing the hidden sides and
end in FIGS. 2 and 3, and showing the telephone handset removed from its
base.