FIG. 1 is a top plan view showing the cordless telephone handset housing of our new ornamental design;

FIG. 2 is a bottom view of thereof;

FIG. 3 is a right side elevation thereof;

FIG. 4 is a left side elevation thereof;

FIG. 5 is a rear elevation thereof; and,

FIG. 6 is a front elevation of thereof.

The antenna illustrated by means of broken lines in the figures is provided for illustrative purposes only and forms no part of the claimed design. Further the buttons and keys illustrated in the figures are provided for illustrative purposes only and form no part of the claimed design.